mirror of
https://github.com/spring-projects/spring-boot.git
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Resolve generic types in generated metadata
Closes gh-15850
This commit is contained in:
parent
51776af45d
commit
91a005f578
@ -1,5 +1,5 @@
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/*
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* Copyright 2012-2018 the original author or authors.
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* Copyright 2012-2019 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -292,7 +292,7 @@ public class ConfigurationMetadataAnnotationProcessor extends AbstractProcessor
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boolean isNested = isNested(returnTypeElement, field, element);
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boolean isCollection = this.typeUtils.isCollectionOrMap(returnType);
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if (!isExcluded && !isNested && (setter != null || isCollection)) {
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String dataType = this.typeUtils.getType(returnType);
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String dataType = this.typeUtils.getType(element, returnType);
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String sourceType = this.typeUtils.getQualifiedName(element);
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String description = this.typeUtils.getJavaDoc(field);
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Object defaultValue = fieldValues.get(name);
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@ -335,7 +335,7 @@ public class ConfigurationMetadataAnnotationProcessor extends AbstractProcessor
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boolean isCollection = this.typeUtils.isCollectionOrMap(returnType);
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boolean hasSetter = hasLombokSetter(field, element);
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if (!isExcluded && !isNested && (hasSetter || isCollection)) {
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String dataType = this.typeUtils.getType(returnType);
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String dataType = this.typeUtils.getType(element, returnType);
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String sourceType = this.typeUtils.getQualifiedName(element);
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String description = this.typeUtils.getJavaDoc(field);
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Object defaultValue = fieldValues.get(name);
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@ -1,5 +1,5 @@
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/*
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* Copyright 2012-2018 the original author or authors.
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* Copyright 2012-2019 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -21,7 +21,9 @@ import java.util.Collection;
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import java.util.Collections;
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import java.util.EnumMap;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.regex.Pattern;
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import java.util.stream.Collectors;
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@ -33,8 +35,10 @@ import javax.lang.model.type.DeclaredType;
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import javax.lang.model.type.PrimitiveType;
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import javax.lang.model.type.TypeKind;
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import javax.lang.model.type.TypeMirror;
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import javax.lang.model.type.TypeVariable;
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import javax.lang.model.util.SimpleTypeVisitor8;
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import javax.lang.model.util.Types;
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import javax.tools.Diagnostic.Kind;
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/**
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* Type Utilities.
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@ -73,18 +77,22 @@ class TypeUtils {
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private final ProcessingEnvironment env;
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private final Types types;
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private final TypeExtractor typeExtractor;
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private final TypeMirror collectionType;
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private final TypeMirror mapType;
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private final Map<TypeElement, TypeDescriptor> typeDescriptors = new HashMap<>();
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TypeUtils(ProcessingEnvironment env) {
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this.env = env;
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Types types = env.getTypeUtils();
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this.typeExtractor = new TypeExtractor(types);
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this.collectionType = getDeclaredType(types, Collection.class, 1);
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this.mapType = getDeclaredType(types, Map.class, 2);
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this.types = env.getTypeUtils();
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this.typeExtractor = new TypeExtractor(this.types);
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this.collectionType = getDeclaredType(this.types, Collection.class, 1);
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this.mapType = getDeclaredType(this.types, Map.class, 2);
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}
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private TypeMirror getDeclaredType(Types types, Class<?> typeClass,
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@ -115,14 +123,15 @@ class TypeUtils {
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/**
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* Return the type of the specified {@link TypeMirror} including all its generic
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* information.
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* @param element the {@link TypeElement} in which this {@code type} is declared
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* @param type the type to handle
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* @return a representation of the type including all its generic information
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*/
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public String getType(TypeMirror type) {
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public String getType(TypeElement element, TypeMirror type) {
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if (type == null) {
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return null;
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}
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return type.accept(this.typeExtractor, null);
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return type.accept(this.typeExtractor, createTypeDescriptor(element));
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}
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public boolean isCollectionOrMap(TypeMirror type) {
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@ -160,11 +169,49 @@ class TypeUtils {
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return WRAPPER_TO_PRIMITIVE.get(type.toString());
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}
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TypeDescriptor resolveTypeDescriptor(TypeElement element) {
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if (this.typeDescriptors.containsKey(element)) {
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return this.typeDescriptors.get(element);
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}
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return createTypeDescriptor(element);
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}
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private TypeDescriptor createTypeDescriptor(TypeElement element) {
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TypeDescriptor descriptor = new TypeDescriptor();
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process(descriptor, element.asType());
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this.typeDescriptors.put(element, descriptor);
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return descriptor;
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}
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private void process(TypeDescriptor descriptor, TypeMirror type) {
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try {
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if (type.getKind() == TypeKind.DECLARED) {
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DeclaredType declaredType = (DeclaredType) type;
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DeclaredType freshType = (DeclaredType) this.env.getElementUtils()
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.getTypeElement(this.types.asElement(type).toString()).asType();
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List<? extends TypeMirror> arguments = declaredType.getTypeArguments();
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for (int i = 0; i < arguments.size(); i++) {
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TypeMirror specificType = arguments.get(i);
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TypeMirror signatureType = freshType.getTypeArguments().get(i);
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descriptor.registerIfNecessary(signatureType, specificType);
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}
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TypeElement element = (TypeElement) this.types.asElement(type);
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process(descriptor, element.getSuperclass());
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}
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}
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catch (Exception ex) {
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this.env.getMessager().printMessage(Kind.WARNING,
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"Failed to generated type descriptor for " + type,
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this.types.asElement(type));
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}
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}
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/**
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* A visitor that extracts the fully qualified name of a type, including generic
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* information.
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*/
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private static class TypeExtractor extends SimpleTypeVisitor8<String, Void> {
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private static class TypeExtractor
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extends SimpleTypeVisitor8<String, TypeDescriptor> {
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private final Types types;
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@ -173,34 +220,60 @@ class TypeUtils {
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}
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@Override
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public String visitDeclared(DeclaredType type, Void none) {
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public String visitDeclared(DeclaredType type, TypeDescriptor descriptor) {
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TypeElement enclosingElement = getEnclosingTypeElement(type);
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if (enclosingElement != null) {
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return getQualifiedName(enclosingElement) + "$"
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+ type.asElement().getSimpleName();
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}
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String qualifiedName = getQualifiedName(type.asElement());
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String qualifiedName = determineQualifiedName(type, enclosingElement);
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if (type.getTypeArguments().isEmpty()) {
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return qualifiedName;
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}
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StringBuilder name = new StringBuilder();
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name.append(qualifiedName);
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name.append("<").append(type.getTypeArguments().stream()
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.map(TypeMirror::toString).collect(Collectors.joining(",")))
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.map((t) -> visit(t, descriptor)).collect(Collectors.joining(",")))
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.append(">");
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return name.toString();
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}
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@Override
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public String visitArray(ArrayType t, Void none) {
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return t.getComponentType().accept(this, none) + "[]";
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private String determineQualifiedName(DeclaredType type,
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TypeElement enclosingElement) {
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if (enclosingElement != null) {
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return getQualifiedName(enclosingElement) + "$"
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+ type.asElement().getSimpleName();
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}
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return getQualifiedName(type.asElement());
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}
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@Override
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public String visitPrimitive(PrimitiveType t, Void none) {
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public String visitTypeVariable(TypeVariable t, TypeDescriptor descriptor) {
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TypeMirror typeMirror = descriptor.resolveGeneric(t);
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if (typeMirror != null) {
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if (typeMirror instanceof TypeVariable) {
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// Still unresolved, let's use upper bound
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return visit(((TypeVariable) typeMirror).getUpperBound(), descriptor);
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}
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else {
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return visit(typeMirror, descriptor);
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}
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}
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// Unresolved generics, use upper bound
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return visit(t.getUpperBound(), descriptor);
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}
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@Override
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public String visitArray(ArrayType t, TypeDescriptor descriptor) {
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return t.getComponentType().accept(this, descriptor) + "[]";
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}
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@Override
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public String visitPrimitive(PrimitiveType t, TypeDescriptor descriptor) {
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return this.types.boxedClass(t).getQualifiedName().toString();
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}
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@Override
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protected String defaultAction(TypeMirror t, TypeDescriptor descriptor) {
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return t.toString();
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}
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public String getQualifiedName(Element element) {
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if (element == null) {
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return null;
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@ -230,4 +303,42 @@ class TypeUtils {
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}
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/**
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* Descriptor for a given type.
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*/
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static class TypeDescriptor {
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private final Map<TypeVariable, TypeMirror> generics = new HashMap<>();
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public Map<TypeVariable, TypeMirror> getGenerics() {
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return Collections.unmodifiableMap(this.generics);
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}
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public TypeMirror resolveGeneric(TypeVariable typeVariable) {
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return resolveGeneric(getParameterName(typeVariable));
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}
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public TypeMirror resolveGeneric(String parameterName) {
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return this.generics.entrySet().stream()
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.filter((e) -> getParameterName(e.getKey()).equals(parameterName))
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.findFirst().map(Entry::getValue).orElse(null);
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}
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private void registerIfNecessary(TypeMirror variable, TypeMirror resolution) {
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if (variable instanceof TypeVariable) {
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TypeVariable typeVariable = (TypeVariable) variable;
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if (this.generics.keySet().stream()
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.noneMatch((candidate) -> getParameterName(candidate)
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.equals(getParameterName(typeVariable)))) {
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this.generics.put(typeVariable, resolution);
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}
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}
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}
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private String getParameterName(TypeVariable typeVariable) {
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return typeVariable.asElement().getSimpleName().toString();
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}
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}
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}
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@ -1,5 +1,5 @@
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/*
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* Copyright 2012-2018 the original author or authors.
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* Copyright 2012-2019 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -45,6 +45,9 @@ import org.springframework.boot.configurationsample.endpoint.EnabledEndpoint;
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import org.springframework.boot.configurationsample.endpoint.SimpleEndpoint;
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import org.springframework.boot.configurationsample.endpoint.SpecificEndpoint;
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import org.springframework.boot.configurationsample.endpoint.incremental.IncrementalEndpoint;
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import org.springframework.boot.configurationsample.generic.AbstractGenericProperties;
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import org.springframework.boot.configurationsample.generic.SimpleGenericProperties;
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import org.springframework.boot.configurationsample.generic.UnresolvedGenericProperties;
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import org.springframework.boot.configurationsample.incremental.BarProperties;
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import org.springframework.boot.configurationsample.incremental.FooProperties;
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import org.springframework.boot.configurationsample.incremental.RenamedBarProperties;
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@ -292,7 +295,7 @@ public class ConfigurationMetadataAnnotationProcessorTests {
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assertThat(metadata).has(Metadata.withProperty("collection.doubles",
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"java.util.List<java.lang.Double>"));
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assertThat(metadata).has(Metadata.withProperty("collection.names-to-holders",
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"java.util.Map<java.lang.String,org.springframework.boot.configurationsample.simple.SimpleCollectionProperties.Holder<java.lang.String>>"));
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"java.util.Map<java.lang.String,org.springframework.boot.configurationsample.simple.SimpleCollectionProperties$Holder<java.lang.String>>"));
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}
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@Test
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@ -504,6 +507,40 @@ public class ConfigurationMetadataAnnotationProcessorTests {
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.withMessageContaining("Compilation failed");
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}
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@Test
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public void simpleGenericProperties() {
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ConfigurationMetadata metadata = compile(AbstractGenericProperties.class,
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SimpleGenericProperties.class);
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assertThat(metadata).has(
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Metadata.withGroup("generic").fromSource(SimpleGenericProperties.class));
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assertThat(metadata).has(Metadata.withProperty("generic.name", String.class)
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.fromSource(SimpleGenericProperties.class)
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.withDescription("Generic name.").withDefaultValue(null));
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assertThat(metadata).has(Metadata
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.withProperty("generic.mappings",
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"java.util.Map<java.lang.Integer,java.time.Duration>")
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.fromSource(SimpleGenericProperties.class)
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.withDescription("Generic mappings.").withDefaultValue(null));
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assertThat(metadata.getItems()).hasSize(3);
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}
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@Test
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public void unresolvedGenericProperties() {
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ConfigurationMetadata metadata = compile(AbstractGenericProperties.class,
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UnresolvedGenericProperties.class);
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assertThat(metadata).has(Metadata.withGroup("generic")
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.fromSource(UnresolvedGenericProperties.class));
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assertThat(metadata).has(Metadata.withProperty("generic.name", String.class)
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.fromSource(UnresolvedGenericProperties.class)
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.withDescription("Generic name.").withDefaultValue(null));
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assertThat(metadata).has(Metadata
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.withProperty("generic.mappings",
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"java.util.Map<java.lang.Number,java.lang.Object>")
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.fromSource(UnresolvedGenericProperties.class)
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.withDescription("Generic mappings.").withDefaultValue(null));
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assertThat(metadata.getItems()).hasSize(3);
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}
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@Test
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public void genericTypes() {
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ConfigurationMetadata metadata = compile(GenericConfig.class);
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@ -518,7 +555,7 @@ public class ConfigurationMetadataAnnotationProcessorTests {
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assertThat(metadata).has(Metadata.withProperty("generic.foo.name")
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.ofType(String.class).fromSource(GenericConfig.Foo.class));
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assertThat(metadata).has(Metadata.withProperty("generic.foo.string-to-bar")
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.ofType("java.util.Map<java.lang.String,org.springframework.boot.configurationsample.specific.GenericConfig.Bar<java.lang.Integer>>")
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.ofType("java.util.Map<java.lang.String,org.springframework.boot.configurationsample.specific.GenericConfig$Bar<java.lang.Integer>>")
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.fromSource(GenericConfig.Foo.class));
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assertThat(metadata).has(Metadata.withProperty("generic.foo.string-to-integer")
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.ofType("java.util.Map<java.lang.String,java.lang.Integer>")
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@ -0,0 +1,136 @@
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/*
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* Copyright 2012-2019 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.boot.configurationprocessor;
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import java.io.IOException;
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import java.time.Duration;
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import java.util.Set;
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import java.util.function.BiConsumer;
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import javax.annotation.processing.AbstractProcessor;
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import javax.annotation.processing.ProcessingEnvironment;
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import javax.annotation.processing.RoundEnvironment;
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import javax.annotation.processing.SupportedAnnotationTypes;
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import javax.annotation.processing.SupportedSourceVersion;
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import javax.lang.model.SourceVersion;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.TypeElement;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.rules.TemporaryFolder;
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import org.springframework.boot.configurationprocessor.TypeUtils.TypeDescriptor;
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import org.springframework.boot.configurationsample.generic.AbstractGenericProperties;
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import org.springframework.boot.configurationsample.generic.AbstractIntermediateGenericProperties;
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import org.springframework.boot.configurationsample.generic.SimpleGenericProperties;
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import org.springframework.boot.testsupport.compiler.TestCompiler;
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import static org.assertj.core.api.Assertions.assertThat;
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/**
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* Tests for {@link TypeUtils}.
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*
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* @author Stephane Nicoll
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*/
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public class TypeUtilsTests {
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@Rule
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public TemporaryFolder temporaryFolder = new TemporaryFolder();
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@Test
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public void resolveTypeDescriptorOnConcreteClass() throws IOException {
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process(SimpleGenericProperties.class, (roundEnv, typeUtils) -> {
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for (Element rootElement : roundEnv.getRootElements()) {
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TypeDescriptor typeDescriptor = typeUtils
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.resolveTypeDescriptor((TypeElement) rootElement);
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assertThat(typeDescriptor.getGenerics().keySet().stream()
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.map(Object::toString)).containsOnly("A", "B", "C");
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assertThat(typeDescriptor.resolveGeneric("A"))
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.hasToString(String.class.getName());
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assertThat(typeDescriptor.resolveGeneric("B"))
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.hasToString(Integer.class.getName());
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assertThat(typeDescriptor.resolveGeneric("C"))
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.hasToString(Duration.class.getName());
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}
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});
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}
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@Test
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public void resolveTypeDescriptorOnIntermediateClass() throws IOException {
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process(AbstractIntermediateGenericProperties.class, (roundEnv, typeUtils) -> {
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for (Element rootElement : roundEnv.getRootElements()) {
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TypeDescriptor typeDescriptor = typeUtils
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.resolveTypeDescriptor((TypeElement) rootElement);
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assertThat(typeDescriptor.getGenerics().keySet().stream()
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.map(Object::toString)).containsOnly("A", "B", "C");
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assertThat(typeDescriptor.resolveGeneric("A"))
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.hasToString(String.class.getName());
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assertThat(typeDescriptor.resolveGeneric("B"))
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.hasToString(Integer.class.getName());
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assertThat(typeDescriptor.resolveGeneric("C")).hasToString("C");
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}
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});
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}
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@Test
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public void resolveTypeDescriptorWithOnlyGenerics() throws IOException {
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process(AbstractGenericProperties.class, (roundEnv, typeUtils) -> {
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for (Element rootElement : roundEnv.getRootElements()) {
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TypeDescriptor typeDescriptor = typeUtils
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.resolveTypeDescriptor((TypeElement) rootElement);
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assertThat(typeDescriptor.getGenerics().keySet().stream()
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.map(Object::toString)).containsOnly("A", "B", "C");
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}
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});
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}
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private void process(Class<?> target,
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BiConsumer<RoundEnvironment, TypeUtils> consumer) throws IOException {
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TestProcessor processor = new TestProcessor(consumer);
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TestCompiler compiler = new TestCompiler(this.temporaryFolder);
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compiler.getTask(target).call(processor);
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}
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@SupportedAnnotationTypes("*")
|
||||
@SupportedSourceVersion(SourceVersion.RELEASE_8)
|
||||
private final class TestProcessor extends AbstractProcessor {
|
||||
|
||||
private final BiConsumer<RoundEnvironment, TypeUtils> typeUtilsConsumer;
|
||||
|
||||
private TypeUtils typeUtils;
|
||||
|
||||
private TestProcessor(BiConsumer<RoundEnvironment, TypeUtils> typeUtils) {
|
||||
this.typeUtilsConsumer = typeUtils;
|
||||
}
|
||||
|
||||
@Override
|
||||
public synchronized void init(ProcessingEnvironment env) {
|
||||
this.typeUtils = new TypeUtils(env);
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean process(Set<? extends TypeElement> annotations,
|
||||
RoundEnvironment roundEnv) {
|
||||
this.typeUtilsConsumer.accept(roundEnv, this.typeUtils);
|
||||
return false;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
@ -0,0 +1,51 @@
|
||||
/*
|
||||
* Copyright 2012-2019 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
package org.springframework.boot.configurationsample.generic;
|
||||
|
||||
import java.util.HashMap;
|
||||
import java.util.Map;
|
||||
|
||||
/**
|
||||
* A base properties class with generics.
|
||||
*
|
||||
* @author Stephane Nicoll
|
||||
*/
|
||||
public class AbstractGenericProperties<A, B, C> {
|
||||
|
||||
/**
|
||||
* Generic name.
|
||||
*/
|
||||
private A name;
|
||||
|
||||
/**
|
||||
* Generic mappings.
|
||||
*/
|
||||
private final Map<B, C> mappings = new HashMap<>();
|
||||
|
||||
public A getName() {
|
||||
return this.name;
|
||||
}
|
||||
|
||||
public void setName(A name) {
|
||||
this.name = name;
|
||||
}
|
||||
|
||||
public Map<B, C> getMappings() {
|
||||
return this.mappings;
|
||||
}
|
||||
|
||||
}
|
@ -0,0 +1,27 @@
|
||||
/*
|
||||
* Copyright 2012-2019 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
package org.springframework.boot.configurationsample.generic;
|
||||
|
||||
/**
|
||||
* An intermediate layer that resolves some of the generics from the parent but not all.
|
||||
*
|
||||
* @author Stephane Nicoll
|
||||
*/
|
||||
public abstract class AbstractIntermediateGenericProperties<C>
|
||||
extends AbstractGenericProperties<String, Integer, C> {
|
||||
|
||||
}
|
@ -0,0 +1,32 @@
|
||||
/*
|
||||
* Copyright 2012-2019 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
package org.springframework.boot.configurationsample.generic;
|
||||
|
||||
import java.time.Duration;
|
||||
|
||||
import org.springframework.boot.configurationsample.ConfigurationProperties;
|
||||
|
||||
/**
|
||||
* Simple properties with resolved generic information.
|
||||
*
|
||||
* @author Stephane Nicoll
|
||||
*/
|
||||
@ConfigurationProperties("generic")
|
||||
public class SimpleGenericProperties
|
||||
extends AbstractIntermediateGenericProperties<Duration> {
|
||||
|
||||
}
|
@ -0,0 +1,30 @@
|
||||
/*
|
||||
* Copyright 2012-2019 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
package org.springframework.boot.configurationsample.generic;
|
||||
|
||||
import org.springframework.boot.configurationsample.ConfigurationProperties;
|
||||
|
||||
/**
|
||||
* Properties with unresolved generic information.
|
||||
*
|
||||
* @author Stephane Nicoll
|
||||
*/
|
||||
@ConfigurationProperties("generic")
|
||||
public class UnresolvedGenericProperties<B extends Number, C>
|
||||
extends AbstractGenericProperties<String, B, C> {
|
||||
|
||||
}
|
Loading…
Reference in New Issue
Block a user