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Eclipse Compiler for Java(TM)
/*******************************************************************************
* Copyright (c) 2000, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Stephan Herrmann - Contributions for
* bug 186342 - [compiler][null] Using annotations for null checking
* bug 365662 - [compiler][null] warn on contradictory and redundant null annotations
* bug 331649 - [compiler][null] consider null annotations for fields
* Bug 392099 - [1.8][compiler][null] Apply null annotation on types for null analysis
* Bug 415043 - [1.8][null] Follow-up re null type annotations after bug 392099
* Bug 392238 - [1.8][compiler][null] Detect semantically invalid null type annotations
* Bug 415850 - [1.8] Ensure RunJDTCoreTests can cope with null annotations enabled
* Bug 417295 - [1.8[[null] Massage type annotated null analysis to gel well with deep encoded type bindings.
* Bug 424728 - [1.8][null] Unexpected error: The nullness annotation 'XXXX' is not applicable at this location
* Bug 392245 - [1.8][compiler][null] Define whether / how @NonNullByDefault applies to TYPE_USE locations
* Bug 429958 - [1.8][null] evaluate new DefaultLocation attribute of @NonNullByDefault
* Bug 435805 - [1.8][compiler][null] Java 8 compiler does not recognize declaration style null annotations
* Bug 457210 - [1.8][compiler][null] Wrong Nullness errors given on full build build but not on incremental build?
* Bug 469584 - ClassCastException in Annotation.detectStandardAnnotation (320)
* Andy Clement (GoPivotal, Inc) [email protected] - Contributions for
* Bug 383624 - [1.8][compiler] Revive code generation support for type annotations (from Olivier's work)
* Bug 409517 - [1.8][compiler] Type annotation problems on more elaborate array references
* Bug 415397 - [1.8][compiler] Type Annotations on wildcard type argument dropped
* Bug 414384 - [1.8] type annotation on abbreviated inner class is not marked as inner type
* Jesper S Moller - Contributions for
* Bug 412153 - [1.8][compiler] Check validity of annotations which may be repeatable
* Bug 412151 - [1.8][compiler] Check repeating annotation's collection type
* Bug 412149 - [1.8][compiler] Emit repeated annotations into the designated container
* Bug 419209 - [1.8] Repeating container annotations should be rejected in the presence of annotation it contains
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;
import java.util.Stack;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.env.EnumConstantSignature;
import org.eclipse.jdt.internal.compiler.impl.BooleanConstant;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.jdt.internal.compiler.impl.Constant;
import org.eclipse.jdt.internal.compiler.impl.IrritantSet;
import org.eclipse.jdt.internal.compiler.lookup.*;
/**
* Annotation
*/
@SuppressWarnings({"rawtypes", "unchecked"})
public abstract class Annotation extends Expression {
Annotation persistibleAnnotation = this; // Emit this into class file, unless this is a repeating annotation, in which case package this into the designated container.
/**
* Return the location for the corresponding annotation inside the type reference, null if none.
*/
public static int[] getLocations(
final Expression reference,
final Annotation annotation) {
class LocationCollector extends ASTVisitor {
Stack typePathEntries;
Annotation searchedAnnotation;
boolean continueSearch = true;
public LocationCollector(Annotation currentAnnotation) {
this.typePathEntries = new Stack();
this.searchedAnnotation = currentAnnotation;
}
private int[] computeNestingDepth(TypeReference typeReference) {
TypeBinding type = typeReference.resolvedType == null ? null : typeReference.resolvedType.leafComponentType();
int[] nestingDepths = new int[typeReference.getAnnotatableLevels()];
if (type != null && type.isNestedType()) {
int depth = 0;
TypeBinding currentType = type;
while (currentType != null) {
depth += (currentType.isStatic()) ? 0 : 1;
currentType = currentType.enclosingType();
}
// Work backwards computing whether a INNER_TYPE entry is required for each level
int counter = nestingDepths.length - 1;
while (type != null && counter >= 0) {
nestingDepths[counter--] = depth;
depth -= type.isStatic() ? 0 : 1;
type = type.enclosingType();
}
}
return nestingDepths;
}
private void inspectAnnotations(Annotation [] annotations) {
for (int i = 0, length = annotations == null ? 0 : annotations.length; this.continueSearch && i < length; i++) {
if (annotations[i] == this.searchedAnnotation)
this.continueSearch = false;
}
}
private void inspectArrayDimensions(Annotation [][] annotationsOnDimensions, int dimensions) {
for (int i = 0; this.continueSearch && i < dimensions; i++) {
Annotation[] annotations = annotationsOnDimensions == null ? null : annotationsOnDimensions[i];
inspectAnnotations(annotations);
if (!this.continueSearch) return;
this.typePathEntries.push(TYPE_PATH_ELEMENT_ARRAY);
}
}
private void inspectTypeArguments(TypeReference[] typeReferences) {
for (int i = 0, length = typeReferences == null ? 0 : typeReferences.length; this.continueSearch && i < length; i++) {
int size = this.typePathEntries.size();
this.typePathEntries.add(new int[]{3,i});
typeReferences[i].traverse(this, (BlockScope) null);
if (!this.continueSearch) return;
this.typePathEntries.setSize(size);
}
}
public boolean visit(TypeReference typeReference, BlockScope scope) {
if (this.continueSearch) {
inspectArrayDimensions(typeReference.getAnnotationsOnDimensions(), typeReference.dimensions());
if (this.continueSearch) {
int[] nestingDepths = computeNestingDepth(typeReference);
Annotation[][] annotations = typeReference.annotations;
TypeReference [][] typeArguments = typeReference.getTypeArguments();
int levels = typeReference.getAnnotatableLevels();
int size = this.typePathEntries.size();
for (int i = levels - 1; this.continueSearch && i >= 0; i--) { // traverse outwards, see comment below about type annotations from SE7 locations.
this.typePathEntries.setSize(size);
for (int j = 0, depth = nestingDepths[i]; j < depth; j++)
this.typePathEntries.add(TYPE_PATH_INNER_TYPE);
if (annotations != null)
inspectAnnotations(annotations[i]);
if (this.continueSearch && typeArguments != null) {
inspectTypeArguments(typeArguments[i]);
}
}
}
}
return false; // if annotation is not found in the type reference, it must be one from SE7 location, typePathEntries captures the proper path entries for them.
}
@Override
public boolean visit(SingleTypeReference typeReference, BlockScope scope) {
return visit((TypeReference) typeReference, scope);
}
@Override
public boolean visit(ArrayTypeReference typeReference, BlockScope scope) {
return visit((TypeReference) typeReference, scope);
}
@Override
public boolean visit(ParameterizedSingleTypeReference typeReference, BlockScope scope) {
return visit((TypeReference) typeReference, scope);
}
@Override
public boolean visit(QualifiedTypeReference typeReference, BlockScope scope) {
return visit((TypeReference) typeReference, scope);
}
@Override
public boolean visit(ArrayQualifiedTypeReference typeReference, BlockScope scope) {
return visit((TypeReference) typeReference, scope);
}
@Override
public boolean visit(ParameterizedQualifiedTypeReference typeReference, BlockScope scope) {
return visit((TypeReference) typeReference, scope);
}
@Override
public boolean visit(Wildcard typeReference, BlockScope scope) {
visit((TypeReference) typeReference, scope);
if (this.continueSearch) {
TypeReference bound = typeReference.bound;
if (bound != null) {
int size = this.typePathEntries.size();
this.typePathEntries.push(TYPE_PATH_ANNOTATION_ON_WILDCARD_BOUND);
bound.traverse(this, scope);
if (this.continueSearch)
this.typePathEntries.setSize(size);
}
}
return false;
}
@Override
public boolean visit(ArrayAllocationExpression allocationExpression, BlockScope scope) {
if (this.continueSearch) {
inspectArrayDimensions(allocationExpression.getAnnotationsOnDimensions(), allocationExpression.dimensions.length);
if (this.continueSearch) {
allocationExpression.type.traverse(this, scope);
}
if (this.continueSearch) throw new IllegalStateException();
}
return false;
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer
.append("search location for ") //$NON-NLS-1$
.append(this.searchedAnnotation)
.append("\ncurrent type_path entries : "); //$NON-NLS-1$
for (int i = 0, maxi = this.typePathEntries.size(); i < maxi; i++) {
int[] typePathEntry = (int[]) this.typePathEntries.get(i);
buffer
.append('(')
.append(typePathEntry[0])
.append(',')
.append(typePathEntry[1])
.append(')');
}
return String.valueOf(buffer);
}
}
if (reference == null) return null;
LocationCollector collector = new LocationCollector(annotation);
reference.traverse(collector, (BlockScope) null);
if (collector.typePathEntries.isEmpty()) {
return null;
}
int size = collector.typePathEntries.size();
int[] result = new int[size*2];
int offset=0;
for (int i = 0; i < size; i++) {
int[] pathElement = (int[])collector.typePathEntries.get(i);
result[offset++] = pathElement[0];
result[offset++] = pathElement[1];
}
return result;
}
final static MemberValuePair[] NoValuePairs = new MemberValuePair[0];
static final int[] TYPE_PATH_ELEMENT_ARRAY = new int[]{0,0};
static final int[] TYPE_PATH_INNER_TYPE = new int[]{1,0};
static final int[] TYPE_PATH_ANNOTATION_ON_WILDCARD_BOUND = new int[]{2,0};
public int declarationSourceEnd;
public Binding recipient;
public TypeReference type;
/**
* The representation of this annotation in the type system.
*/
protected AnnotationBinding compilerAnnotation = null;
public static long getRetentionPolicy(char[] policyName) {
if (policyName == null || policyName.length == 0)
return 0;
switch(policyName[0]) {
case 'C' :
if (CharOperation.equals(policyName, TypeConstants.UPPER_CLASS))
return TagBits.AnnotationClassRetention;
break;
case 'S' :
if (CharOperation.equals(policyName, TypeConstants.UPPER_SOURCE))
return TagBits.AnnotationSourceRetention;
break;
case 'R' :
if (CharOperation.equals(policyName, TypeConstants.UPPER_RUNTIME))
return TagBits.AnnotationRuntimeRetention;
break;
}
return 0; // unknown
}
public static long getTargetElementType(char[] elementName) {
if (elementName == null || elementName.length == 0)
return 0;
switch(elementName[0]) {
case 'A' :
if (CharOperation.equals(elementName, TypeConstants.UPPER_ANNOTATION_TYPE))
return TagBits.AnnotationForAnnotationType;
break;
case 'C' :
if (CharOperation.equals(elementName, TypeConstants.UPPER_CONSTRUCTOR))
return TagBits.AnnotationForConstructor;
break;
case 'F' :
if (CharOperation.equals(elementName, TypeConstants.UPPER_FIELD))
return TagBits.AnnotationForField;
break;
case 'L' :
if (CharOperation.equals(elementName, TypeConstants.UPPER_LOCAL_VARIABLE))
return TagBits.AnnotationForLocalVariable;
break;
case 'M' :
if (CharOperation.equals(elementName, TypeConstants.UPPER_METHOD))
return TagBits.AnnotationForMethod;
else if (CharOperation.equals(elementName, TypeConstants.UPPER_MODULE))
return TagBits.AnnotationForModule;
break;
case 'P' :
if (CharOperation.equals(elementName, TypeConstants.UPPER_PARAMETER))
return TagBits.AnnotationForParameter;
else if (CharOperation.equals(elementName, TypeConstants.UPPER_PACKAGE))
return TagBits.AnnotationForPackage;
break;
case 'T' :
if (CharOperation.equals(elementName, TypeConstants.TYPE))
return TagBits.AnnotationForType;
if (CharOperation.equals(elementName, TypeConstants.TYPE_USE_TARGET))
return TagBits.AnnotationForTypeUse;
if (CharOperation.equals(elementName, TypeConstants.TYPE_PARAMETER_TARGET))
return TagBits.AnnotationForTypeParameter;
break;
}
return 0; // unknown
}
public ElementValuePair[] computeElementValuePairs() {
return Binding.NO_ELEMENT_VALUE_PAIRS;
}
/**
* Compute the bit pattern for recognized standard annotations the compiler may need to act upon.
* The lower bits (Binding.NullnessDefaultMASK) do not belong in tagBits, but in defaultNullness.
*/
private long detectStandardAnnotation(Scope scope, ReferenceBinding annotationType, MemberValuePair valueAttribute) {
long tagBits = 0;
switch (annotationType.id) {
// retention annotation
case TypeIds.T_JavaLangAnnotationRetention :
if (valueAttribute != null) {
Expression expr = valueAttribute.value;
if ((expr.bits & Binding.VARIABLE) == Binding.FIELD && expr instanceof Reference) { // anything but Reference would be a type error anyway
FieldBinding field = ((Reference)expr).fieldBinding();
if (field != null && field.declaringClass.id == T_JavaLangAnnotationRetentionPolicy) {
tagBits |= getRetentionPolicy(field.name);
}
}
}
break;
// target annotation
case TypeIds.T_JavaLangAnnotationTarget :
tagBits |= TagBits.AnnotationTarget; // target specified (could be empty)
if (valueAttribute != null) {
Expression expr = valueAttribute.value;
if (expr instanceof ArrayInitializer) {
ArrayInitializer initializer = (ArrayInitializer) expr;
final Expression[] expressions = initializer.expressions;
if (expressions != null) {
for (int i = 0, length = expressions.length; i < length; i++) {
Expression initExpr = expressions[i];
if ((initExpr.bits & Binding.VARIABLE) == Binding.FIELD) {
FieldBinding field = ((Reference) initExpr).fieldBinding();
if (field != null && field.declaringClass.id == T_JavaLangAnnotationElementType) {
long element = getTargetElementType(field.name);
if ((tagBits & element) != 0) {
scope.problemReporter().duplicateTargetInTargetAnnotation(annotationType, (NameReference)initExpr);
} else {
tagBits |= element;
}
}
}
}
}
} else if ((expr.bits & Binding.VARIABLE) == Binding.FIELD) {
FieldBinding field = ((Reference) expr).fieldBinding();
if (field != null && field.declaringClass.id == T_JavaLangAnnotationElementType) {
tagBits |= getTargetElementType(field.name);
}
}
}
break;
// marker annotations
case TypeIds.T_JavaLangDeprecated :
tagBits |= TagBits.AnnotationDeprecated;
if (scope.compilerOptions().complianceLevel >= ClassFileConstants.JDK9) {
for (MemberValuePair memberValuePair : memberValuePairs()) {
if (CharOperation.equals(memberValuePair.name, TypeConstants.FOR_REMOVAL)) {
if (memberValuePair.value instanceof TrueLiteral)
tagBits |= TagBits.AnnotationTerminallyDeprecated;
break;
}
}
}
break;
case TypeIds.T_JavaLangAnnotationDocumented :
tagBits |= TagBits.AnnotationDocumented;
break;
case TypeIds.T_JavaLangAnnotationInherited :
tagBits |= TagBits.AnnotationInherited;
break;
case TypeIds.T_JavaLangOverride :
tagBits |= TagBits.AnnotationOverride;
break;
case TypeIds.T_JavaLangFunctionalInterface :
tagBits |= TagBits.AnnotationFunctionalInterface;
break;
case TypeIds.T_JavaLangAnnotationRepeatable:
tagBits |= TagBits.AnnotationRepeatable;
break;
case TypeIds.T_JavaLangSuppressWarnings :
tagBits |= TagBits.AnnotationSuppressWarnings;
break;
case TypeIds.T_JavaLangSafeVarargs :
tagBits |= TagBits.AnnotationSafeVarargs;
break;
case TypeIds.T_JavaLangInvokeMethodHandlePolymorphicSignature :
tagBits |= TagBits.AnnotationPolymorphicSignature;
break;
}
if (annotationType.hasNullBit(TypeIds.BitNullableAnnotation)) {
tagBits |= TagBits.AnnotationNullable;
} else if (annotationType.hasNullBit(TypeIds.BitNonNullAnnotation)) {
tagBits |= TagBits.AnnotationNonNull;
} else if (annotationType.hasNullBit(TypeIds.BitNonNullByDefaultAnnotation)) {
tagBits |= determineNonNullByDefaultTagBits(annotationType, valueAttribute);
}
return tagBits;
}
private long determineNonNullByDefaultTagBits(ReferenceBinding annotationType, MemberValuePair valueAttribute) {
long tagBits = 0;
Object value = null;
if (valueAttribute != null) {
if (valueAttribute.compilerElementPair != null)
value = valueAttribute.compilerElementPair.value;
} else { // fetch default value - TODO: cache it?
MethodBinding[] methods = annotationType.methods();
if (methods != null && methods.length == 1)
value = methods[0].getDefaultValue();
else
tagBits |= Binding.DefaultLocationsForTrueValue; // custom unconfigurable NNBD
}
if (value instanceof BooleanConstant) {
// boolean value is used for declaration annotations, signal using the annotation tag bit:
tagBits |= ((BooleanConstant)value).booleanValue() ? Binding.DefaultLocationsForTrueValue : Binding.NULL_UNSPECIFIED_BY_DEFAULT;
} else if (value != null) {
// non-boolean value signals type annotations, evaluate from DefaultLocation[] to bitvector a la Binding#NullnessDefaultMASK:
tagBits |= nullLocationBitsFromAnnotationValue(value);
} else {
int result = BinaryTypeBinding.evaluateTypeQualifierDefault(annotationType);
if(result != 0) {
return result;
}
}
return tagBits;
}
/**
* Convert the value() attribute of @NonNullByDefault into a bitvector a la {@link Binding#NullnessDefaultMASK}.
* This method understands value encodings from source and binary types.
*
* pre: null annotation analysis is enabled
*/
public static int nullLocationBitsFromAnnotationValue(Object value) {
if (value instanceof Object[]) {
if (((Object[]) value).length == 0) { // ({})
return Binding.NULL_UNSPECIFIED_BY_DEFAULT;
} else { // ({vals...})
int bits = 0;
for (Object single : (Object[])value)
bits |= evaluateDefaultNullnessLocation(single);
return bits;
}
} else { // (val)
return evaluateDefaultNullnessLocation(value);
}
}
private static int evaluateDefaultNullnessLocation(Object value) {
char[] name = null;
if (value instanceof FieldBinding) {
name = ((FieldBinding) value).name;
} else if (value instanceof EnumConstantSignature) {
name = ((EnumConstantSignature) value).getEnumConstantName();
} else if (value instanceof ElementValuePair.UnresolvedEnumConstant) {
name = ((ElementValuePair.UnresolvedEnumConstant) value).getEnumConstantName();
} else if (value instanceof BooleanConstant) {
return ((BooleanConstant)value).booleanValue() ? Binding.DefaultLocationsForTrueValue : Binding.NULL_UNSPECIFIED_BY_DEFAULT;
}
if (name != null) {
switch (name.length) {
case 5:
if (CharOperation.equals(name, TypeConstants.DEFAULT_LOCATION__FIELD))
return Binding.DefaultLocationField;
break;
case 9:
if (CharOperation.equals(name, TypeConstants.DEFAULT_LOCATION__PARAMETER))
return Binding.DefaultLocationParameter;
break;
case 10:
if (CharOperation.equals(name, TypeConstants.DEFAULT_LOCATION__TYPE_BOUND))
return Binding.DefaultLocationTypeBound;
break;
case 11:
if (CharOperation.equals(name, TypeConstants.DEFAULT_LOCATION__RETURN_TYPE))
return Binding.DefaultLocationReturnType;
break;
case 13 :
if (CharOperation.equals(name, TypeConstants.DEFAULT_LOCATION__TYPE_ARGUMENT))
return Binding.DefaultLocationTypeArgument;
break;
case 14 :
if (CharOperation.equals(name, TypeConstants.DEFAULT_LOCATION__TYPE_PARAMETER))
return Binding.DefaultLocationTypeParameter;
if (CharOperation.equals(name, TypeConstants.DEFAULT_LOCATION__ARRAY_CONTENTS))
return Binding.DefaultLocationArrayContents;
break;
}
}
return 0;
}
public static int nullLocationBitsFromElementTypeAnnotationValue(Object value) {
if (value instanceof Object[]) {
if (((Object[]) value).length == 0) { // ({})
return Binding.NULL_UNSPECIFIED_BY_DEFAULT;
} else { // ({vals...})
int bits = 0;
for (Object single : (Object[])value)
bits |= evaluateElementTypeNullnessLocation(single);
return bits;
}
} else { // (val)
return evaluateElementTypeNullnessLocation(value);
}
}
private static int evaluateElementTypeNullnessLocation(Object value) {
char[] name = null;
if (value instanceof FieldBinding) {
name = ((FieldBinding) value).name;
} else if (value instanceof EnumConstantSignature) {
name = ((EnumConstantSignature) value).getEnumConstantName();
} else if (value instanceof ElementValuePair.UnresolvedEnumConstant) {
name = ((ElementValuePair.UnresolvedEnumConstant) value).getEnumConstantName();
}
if (name != null) {
switch (name.length) {
case 5:
if (CharOperation.equals(name, TypeConstants.UPPER_FIELD))
return Binding.DefaultLocationField;
break;
case 6:
if (CharOperation.equals(name, TypeConstants.UPPER_METHOD))
return Binding.DefaultLocationReturnType;
break;
case 9:
if (CharOperation.equals(name, TypeConstants.UPPER_PARAMETER))
return Binding.DefaultLocationParameter;
break;
}
}
return 0;
}
static String getRetentionName(long tagBits) {
if ((tagBits & TagBits.AnnotationRuntimeRetention) == TagBits.AnnotationRuntimeRetention) {
// TagBits.AnnotationRuntimeRetention combines both TagBits.AnnotationClassRetention & TagBits.AnnotationSourceRetention
return new String(UPPER_RUNTIME);
} else if ((tagBits & TagBits.AnnotationSourceRetention) != 0) {
return new String(UPPER_SOURCE);
} else {
return new String(TypeConstants.UPPER_CLASS);
}
}
private static long getAnnotationRetention(ReferenceBinding binding) {
long retention = binding.getAnnotationTagBits() & TagBits.AnnotationRetentionMASK;
// Retention defaults to CLASS
return retention != 0 ? retention : TagBits.AnnotationClassRetention;
}
public void checkRepeatableMetaAnnotation(BlockScope scope) {
// `this' is the @Repeatable meta annotation, its recipient is the *repeatable* annotation type - we are at the declaration site, not the repeating use site.
ReferenceBinding repeatableAnnotationType = (ReferenceBinding) this.recipient; // know it to be an annotation type. On target miss we don't get here
MemberValuePair[] valuePairs = this.memberValuePairs();
if (valuePairs == null || valuePairs.length != 1)
return;
Object value = valuePairs[0].compilerElementPair.value;
if (!(value instanceof ReferenceBinding))
return; // Has deeper problems, will bark elsewhere.
ReferenceBinding containerAnnotationType = (ReferenceBinding) value;
if (!containerAnnotationType.isAnnotationType())
return; // Has deeper problems, will bark elsewhere.
repeatableAnnotationType.setContainerAnnotationType(containerAnnotationType); // For now. May be reset later to PRB in case of problems.
checkContainerAnnotationType(valuePairs[0], scope, containerAnnotationType, repeatableAnnotationType, false); // false => not use site, i.e declaration site error reporting requested.
}
public static void checkContainerAnnotationType(ASTNode culpritNode, BlockScope scope, ReferenceBinding containerAnnotationType, ReferenceBinding repeatableAnnotationType, boolean useSite) {
MethodBinding[] annotationMethods = containerAnnotationType.methods();
boolean sawValue = false;
for (int i = 0, length = annotationMethods.length; i < length; ++i) {
MethodBinding method = annotationMethods[i];
if (CharOperation.equals(method.selector, TypeConstants.VALUE)) {
sawValue = true;
if (method.returnType.isArrayType() && method.returnType.dimensions() == 1) {
ArrayBinding array = (ArrayBinding) method.returnType;
if (TypeBinding.equalsEquals(array.elementsType(), repeatableAnnotationType)) continue;
}
repeatableAnnotationType.tagAsHavingDefectiveContainerType();
scope.problemReporter().containerAnnotationTypeHasWrongValueType(culpritNode, containerAnnotationType, repeatableAnnotationType, method.returnType);
} else {
// Not the value() - must have default (or else isn't suitable as container)
if ((method.modifiers & ClassFileConstants.AccAnnotationDefault) == 0) {
repeatableAnnotationType.tagAsHavingDefectiveContainerType();
scope.problemReporter().containerAnnotationTypeHasNonDefaultMembers(culpritNode, containerAnnotationType, method.selector);
}
}
}
if (!sawValue) {
repeatableAnnotationType.tagAsHavingDefectiveContainerType();
scope.problemReporter().containerAnnotationTypeMustHaveValue(culpritNode, containerAnnotationType);
}
if (useSite)
checkContainingAnnotationTargetAtUse((Annotation) culpritNode, scope, containerAnnotationType, repeatableAnnotationType);
else
checkContainerAnnotationTypeTarget(culpritNode, scope, containerAnnotationType, repeatableAnnotationType);
long annotationTypeBits = getAnnotationRetention(repeatableAnnotationType);
long containerTypeBits = getAnnotationRetention(containerAnnotationType);
// Due to clever layout of the bits, we can compare the absolute value directly
if (containerTypeBits < annotationTypeBits) {
repeatableAnnotationType.tagAsHavingDefectiveContainerType();
scope.problemReporter().containerAnnotationTypeHasShorterRetention(culpritNode, repeatableAnnotationType, getRetentionName(annotationTypeBits), containerAnnotationType, getRetentionName(containerTypeBits));
}
if ((repeatableAnnotationType.getAnnotationTagBits() & TagBits.AnnotationDocumented) != 0 && (containerAnnotationType.getAnnotationTagBits() & TagBits.AnnotationDocumented) == 0) {
repeatableAnnotationType.tagAsHavingDefectiveContainerType();
scope.problemReporter().repeatableAnnotationTypeIsDocumented(culpritNode, repeatableAnnotationType, containerAnnotationType);
}
if ((repeatableAnnotationType.getAnnotationTagBits() & TagBits.AnnotationInherited) != 0 && (containerAnnotationType.getAnnotationTagBits() & TagBits.AnnotationInherited) == 0) {
repeatableAnnotationType.tagAsHavingDefectiveContainerType();
scope.problemReporter().repeatableAnnotationTypeIsInherited(culpritNode, repeatableAnnotationType, containerAnnotationType);
}
}
// This is for error reporting for bad targets at annotation type declaration site (as opposed to the repeat site)
private static void checkContainerAnnotationTypeTarget(ASTNode culpritNode, Scope scope, ReferenceBinding containerType, ReferenceBinding repeatableAnnotationType) {
long tagBits = repeatableAnnotationType.getAnnotationTagBits();
if ((tagBits & TagBits.AnnotationTargetMASK) == 0)
tagBits = TagBits.SE7AnnotationTargetMASK; // absence of @Target meta-annotation implies all SE7 targets not all targets.
long containerAnnotationTypeTypeTagBits = containerType.getAnnotationTagBits();
if ((containerAnnotationTypeTypeTagBits & TagBits.AnnotationTargetMASK) == 0)
containerAnnotationTypeTypeTagBits = TagBits.SE7AnnotationTargetMASK;
final long targets = tagBits & TagBits.AnnotationTargetMASK;
final long containerAnnotationTypeTargets = containerAnnotationTypeTypeTagBits & TagBits.AnnotationTargetMASK;
if ((containerAnnotationTypeTargets & ~targets) != 0) {
class MissingTargetBuilder {
StringBuffer targetBuffer = new StringBuffer();
void check(long targetMask, char[] targetName) {
if ((containerAnnotationTypeTargets & targetMask & ~targets) != 0) {
// if targetMask equals TagBits.AnnotationForType implies
// TagBits.AnnotationForType is part of containerAnnotationTypeTargets
if (targetMask == TagBits.AnnotationForType &&
(targets & TagBits.AnnotationForTypeUse) != 0) {
return;
}
add(targetName);
}
}
void checkAnnotationType(char[] targetName) {
if ((containerAnnotationTypeTargets & TagBits.AnnotationForAnnotationType) != 0 &&
((targets & (TagBits.AnnotationForAnnotationType | TagBits.AnnotationForType))) == 0) {
add(targetName);
}
}
private void add(char[] targetName) {
if (this.targetBuffer.length() != 0) {
this.targetBuffer.append(", "); //$NON-NLS-1$
}
this.targetBuffer.append(targetName);
}
@Override
public String toString() {
return this.targetBuffer.toString();
}
public boolean hasError() {
return this.targetBuffer.length() != 0;
}
}
MissingTargetBuilder builder = new MissingTargetBuilder();
builder.check(TagBits.AnnotationForType, TypeConstants.TYPE);
builder.check(TagBits.AnnotationForField, TypeConstants.UPPER_FIELD);
builder.check(TagBits.AnnotationForMethod, TypeConstants.UPPER_METHOD);
builder.check(TagBits.AnnotationForParameter, TypeConstants.UPPER_PARAMETER);
builder.check(TagBits.AnnotationForConstructor, TypeConstants.UPPER_CONSTRUCTOR);
builder.check(TagBits.AnnotationForLocalVariable, TypeConstants.UPPER_LOCAL_VARIABLE);
builder.checkAnnotationType(TypeConstants.UPPER_ANNOTATION_TYPE);
builder.check(TagBits.AnnotationForPackage, TypeConstants.UPPER_PACKAGE);
builder.check(TagBits.AnnotationForTypeParameter, TypeConstants.TYPE_PARAMETER_TARGET);
builder.check(TagBits.AnnotationForTypeUse, TypeConstants.TYPE_USE_TARGET);
builder.check(TagBits.AnnotationForModule, TypeConstants.UPPER_MODULE);
if (builder.hasError()) {
repeatableAnnotationType.tagAsHavingDefectiveContainerType();
scope.problemReporter().repeatableAnnotationTypeTargetMismatch(culpritNode, repeatableAnnotationType, containerType, builder.toString());
}
}
}
// This is for error reporting for bad targets at the repeated annotation use site (as opposed to repeatable annotation type declaration site) - Leads to better message.
public static void checkContainingAnnotationTargetAtUse(Annotation repeatingAnnotation, BlockScope scope, TypeBinding containerAnnotationType, TypeBinding repeatingAnnotationType) {
// check (meta)target compatibility
if (!repeatingAnnotationType.isValidBinding()) {
// no need to check annotation usage if missing
return;
}
if (isAnnotationTargetAllowed(repeatingAnnotation, scope, containerAnnotationType, repeatingAnnotation.recipient.kind()) != AnnotationTargetAllowed.YES) {
scope.problemReporter().disallowedTargetForContainerAnnotation(repeatingAnnotation, containerAnnotationType);
}
}
public AnnotationBinding getCompilerAnnotation() {
return this.compilerAnnotation;
}
public boolean isRuntimeInvisible() {
final TypeBinding annotationBinding = this.resolvedType;
if (annotationBinding == null) {
return false;
}
long metaTagBits = annotationBinding.getAnnotationTagBits(); // could be forward reference
// we need to filter out only "pure" type use and type parameter annotations, see https://bugs.eclipse.org/bugs/show_bug.cgi?id=392119
if ((metaTagBits & (TagBits.AnnotationForTypeParameter | TagBits.AnnotationForTypeUse)) != 0) {
if ((metaTagBits & TagBits.SE7AnnotationTargetMASK) == 0) { // not a hybrid target.
return false;
}
}
if ((metaTagBits & TagBits.AnnotationRetentionMASK) == 0)
return true; // by default the retention is CLASS
return (metaTagBits & TagBits.AnnotationRetentionMASK) == TagBits.AnnotationClassRetention;
}
public boolean isRuntimeTypeInvisible() {
final TypeBinding annotationBinding = this.resolvedType;
if (annotationBinding == null) {
return false;
}
long metaTagBits = annotationBinding.getAnnotationTagBits(); // could be forward reference
if ((metaTagBits & (TagBits.AnnotationTargetMASK)) == 0) { // explicit target required for JSR308 style annotations.
return false;
}
if ((metaTagBits & (TagBits.AnnotationForTypeParameter | TagBits.AnnotationForTypeUse)) == 0) {
return false;
}
if ((metaTagBits & TagBits.AnnotationRetentionMASK) == 0)
return true; // by default the retention is CLASS
return (metaTagBits & TagBits.AnnotationRetentionMASK) == TagBits.AnnotationClassRetention;
}
public boolean isRuntimeTypeVisible() {
final TypeBinding annotationBinding = this.resolvedType;
if (annotationBinding == null) {
return false;
}
long metaTagBits = annotationBinding.getAnnotationTagBits();
if ((metaTagBits & (TagBits.AnnotationTargetMASK)) == 0) { // explicit target required for JSR308 style annotations.
return false;
}
if ((metaTagBits & (TagBits.AnnotationForTypeParameter | TagBits.AnnotationForTypeUse)) == 0) {
return false;
}
if ((metaTagBits & TagBits.AnnotationRetentionMASK) == 0)
return false; // by default the retention is CLASS
return (metaTagBits & TagBits.AnnotationRetentionMASK) == TagBits.AnnotationRuntimeRetention;
}
public boolean isRuntimeVisible() {
final TypeBinding annotationBinding = this.resolvedType;
if (annotationBinding == null) {
return false;
}
long metaTagBits = annotationBinding.getAnnotationTagBits();
// we need to filter out only "pure" type use and type parameter annotations, see https://bugs.eclipse.org/bugs/show_bug.cgi?id=392119
if ((metaTagBits & (TagBits.AnnotationForTypeParameter | TagBits.AnnotationForTypeUse)) != 0) {
if ((metaTagBits & TagBits.SE7AnnotationTargetMASK) == 0) { // not a hybrid target.
return false;
}
}
if ((metaTagBits & TagBits.AnnotationRetentionMASK) == 0)
return false; // by default the retention is CLASS
return (metaTagBits & TagBits.AnnotationRetentionMASK) == TagBits.AnnotationRuntimeRetention;
}
public abstract MemberValuePair[] memberValuePairs();
@Override
public StringBuffer printExpression(int indent, StringBuffer output) {
output.append('@');
this.type.printExpression(0, output);
return output;
}
public void recordSuppressWarnings(Scope scope, int startSuppresss, int endSuppress, boolean isSuppressingWarnings) {
IrritantSet suppressWarningIrritants = null;
MemberValuePair[] pairs = memberValuePairs();
pairLoop: for (int i = 0, length = pairs.length; i < length; i++) {
MemberValuePair pair = pairs[i];
if (CharOperation.equals(pair.name, TypeConstants.VALUE)) {
Expression value = pair.value;
if (value instanceof ArrayInitializer) {
ArrayInitializer initializer = (ArrayInitializer) value;
Expression[] inits = initializer.expressions;
if (inits != null) {
for (int j = 0, initsLength = inits.length; j < initsLength; j++) {
Constant cst = inits[j].constant;
if (cst != Constant.NotAConstant && cst.typeID() == T_JavaLangString) {
IrritantSet irritants = CompilerOptions.warningTokenToIrritants(cst.stringValue());
if (irritants != null) {
if (suppressWarningIrritants == null) {
suppressWarningIrritants = new IrritantSet(irritants);
} else if (suppressWarningIrritants.set(irritants) == null) {
scope.problemReporter().unusedWarningToken(inits[j]);
}
} else {
scope.problemReporter().unhandledWarningToken(inits[j]);
}
}
}
}
} else {
Constant cst = value.constant;
if (cst != Constant.NotAConstant && cst.typeID() == T_JavaLangString) {
IrritantSet irritants = CompilerOptions.warningTokenToIrritants(cst.stringValue());
if (irritants != null) {
suppressWarningIrritants = new IrritantSet(irritants);
// TODO: should check for unused warning token against enclosing annotation as well ?
} else {
scope.problemReporter().unhandledWarningToken(value);
}
}
}
break pairLoop;
}
}
if (isSuppressingWarnings && suppressWarningIrritants != null) {
scope.referenceCompilationUnit().recordSuppressWarnings(suppressWarningIrritants, this, startSuppresss, endSuppress, scope.referenceContext());
}
}
@Override
public TypeBinding resolveType(BlockScope scope) {
if (this.compilerAnnotation != null)
return this.resolvedType;
this.constant = Constant.NotAConstant;
TypeBinding typeBinding;
if (this.resolvedType == null) {
typeBinding = this.type.resolveType(scope);
if (typeBinding == null) {
this.resolvedType = new ProblemReferenceBinding(this.type.getTypeName(), null, ProblemReasons.NotFound);
return null;
}
this.resolvedType = typeBinding;
} else {
typeBinding = this.resolvedType;
}
// ensure type refers to an annotation type
if (!typeBinding.isAnnotationType() && typeBinding.isValidBinding()) {
scope.problemReporter().notAnnotationType(typeBinding, this.type);
return null;
}
ReferenceBinding annotationType = (ReferenceBinding) this.resolvedType;
MethodBinding[] methods = annotationType.methods();
// clone valuePairs to keep track of unused ones
MemberValuePair[] originalValuePairs = memberValuePairs();
MemberValuePair valueAttribute = null; // remember the first 'value' pair
MemberValuePair[] pairs;
int pairsLength = originalValuePairs.length;
if (pairsLength > 0) {
System.arraycopy(originalValuePairs, 0, pairs = new MemberValuePair[pairsLength], 0, pairsLength);
} else {
pairs = originalValuePairs;
}
nextMember: for (int i = 0, requiredLength = methods.length; i < requiredLength; i++) {
MethodBinding method = methods[i];
char[] selector = method.selector;
boolean foundValue = false;
nextPair: for (int j = 0; j < pairsLength; j++) {
MemberValuePair pair = pairs[j];
if (pair == null) continue nextPair;
char[] name = pair.name;
if (CharOperation.equals(name, selector)) {
if (valueAttribute == null && CharOperation.equals(name, TypeConstants.VALUE)) {
valueAttribute = pair;
}
pair.binding = method;
pair.resolveTypeExpecting(scope, method.returnType);
pairs[j] = null; // consumed
foundValue = true;
// check duplicates
boolean foundDuplicate = false;
for (int k = j+1; k < pairsLength; k++) {
MemberValuePair otherPair = pairs[k];
if (otherPair == null) continue;
if (CharOperation.equals(otherPair.name, selector)) {
foundDuplicate = true;
scope.problemReporter().duplicateAnnotationValue(annotationType, otherPair);
otherPair.binding = method;
otherPair.resolveTypeExpecting(scope, method.returnType);
pairs[k] = null;
}
}
if (foundDuplicate) {
scope.problemReporter().duplicateAnnotationValue(annotationType, pair);
continue nextMember;
}
}
}
if (!foundValue
&& (method.modifiers & ClassFileConstants.AccAnnotationDefault) == 0
&& (this.bits & IsRecovered) == 0
&& annotationType.isValidBinding()) {
scope.problemReporter().missingValueForAnnotationMember(this, selector);
}
}
// check unused pairs
for (int i = 0; i < pairsLength; i++) {
if (pairs[i] != null) {
if (annotationType.isValidBinding()) {
scope.problemReporter().undefinedAnnotationValue(annotationType, pairs[i]);
}
pairs[i].resolveTypeExpecting(scope, null); // resilient
}
}
this.compilerAnnotation = scope.environment().createAnnotation((ReferenceBinding) this.resolvedType, computeElementValuePairs());
// recognize standard annotations ?
long tagBits = detectStandardAnnotation(scope, annotationType, valueAttribute);
int defaultNullness = (int)(tagBits & Binding.NullnessDefaultMASK);
tagBits &= ~Binding.NullnessDefaultMASK;
CompilerOptions compilerOptions = scope.compilerOptions();
if ((tagBits & TagBits.AnnotationDeprecated) != 0 && compilerOptions.complianceLevel >= ClassFileConstants.JDK9 && !compilerOptions.storeAnnotations) {
this.recipient.setAnnotations(new AnnotationBinding[] {this.compilerAnnotation}, true); // force storing enhanced deprecation
}
// record annotation positions in the compilation result
scope.referenceCompilationUnit().recordSuppressWarnings(IrritantSet.NLS, null, this.sourceStart, this.declarationSourceEnd, scope.referenceContext());
if (this.recipient != null) {
int kind = this.recipient.kind();
if (tagBits != 0 || defaultNullness != 0) {
// tag bits onto recipient
switch (kind) {
case Binding.MODULE :
SourceModuleBinding module = (SourceModuleBinding) this.recipient;
module.tagBits |= tagBits;
if ((tagBits & TagBits.AnnotationSuppressWarnings) != 0) {
ModuleDeclaration moduleDeclaration = module.scope.referenceContext.moduleDeclaration;
recordSuppressWarnings(scope, 0, moduleDeclaration.declarationSourceEnd, compilerOptions.suppressWarnings);
}
module.defaultNullness |= defaultNullness;
break;
case Binding.PACKAGE :
((PackageBinding)this.recipient).tagBits |= tagBits;
break;
case Binding.TYPE :
case Binding.GENERIC_TYPE :
SourceTypeBinding sourceType = (SourceTypeBinding) this.recipient;
if ((tagBits & TagBits.AnnotationRepeatable) == 0 || sourceType.isAnnotationType()) // don't set AnnotationRepeatable on non-annotation types.
sourceType.tagBits |= tagBits;
if ((tagBits & TagBits.AnnotationSuppressWarnings) != 0) {
TypeDeclaration typeDeclaration = sourceType.scope.referenceContext;
int start;
if (scope.referenceCompilationUnit().types[0] == typeDeclaration) {
start = 0;
} else {
start = typeDeclaration.declarationSourceStart;
}
recordSuppressWarnings(scope, start, typeDeclaration.declarationSourceEnd, compilerOptions.suppressWarnings);
}
sourceType.defaultNullness |= defaultNullness;
break;
case Binding.METHOD :
MethodBinding sourceMethod = (MethodBinding) this.recipient;
sourceMethod.tagBits |= tagBits;
if ((tagBits & TagBits.AnnotationSuppressWarnings) != 0) {
sourceType = (SourceTypeBinding) sourceMethod.declaringClass;
AbstractMethodDeclaration methodDeclaration = sourceType.scope.referenceContext.declarationOf(sourceMethod);
recordSuppressWarnings(scope, methodDeclaration.declarationSourceStart, methodDeclaration.declarationSourceEnd, compilerOptions.suppressWarnings);
}
long nullBits = sourceMethod.tagBits & TagBits.AnnotationNullMASK;
if (nullBits == TagBits.AnnotationNullMASK) {
scope.problemReporter().contradictoryNullAnnotations(this);
sourceMethod.tagBits &= ~TagBits.AnnotationNullMASK; // avoid secondary problems
}
if (nullBits != 0 && sourceMethod.isConstructor()) {
if (compilerOptions.sourceLevel >= ClassFileConstants.JDK1_8)
scope.problemReporter().nullAnnotationUnsupportedLocation(this);
// for declaration annotations the inapplicability will be reported below
sourceMethod.tagBits &= ~TagBits.AnnotationNullMASK;
}
sourceMethod.defaultNullness |= defaultNullness;
break;
case Binding.FIELD :
FieldBinding sourceField = (FieldBinding) this.recipient;
sourceField.tagBits |= tagBits;
if ((tagBits & TagBits.AnnotationSuppressWarnings) != 0) {
sourceType = (SourceTypeBinding) sourceField.declaringClass;
FieldDeclaration fieldDeclaration = sourceType.scope.referenceContext.declarationOf(sourceField);
recordSuppressWarnings(scope, fieldDeclaration.declarationSourceStart, fieldDeclaration.declarationSourceEnd, compilerOptions.suppressWarnings);
}
if (defaultNullness != 0) {
sourceType = (SourceTypeBinding) sourceField.declaringClass;
FieldDeclaration fieldDeclaration = sourceType.scope.referenceContext.declarationOf(sourceField);
// test merged value of defaultNullness contributed by this annotation and previous annotations on same target is redundant w.r.t. containing value
// (for targets other than fields the resulting value is tested only once after processing all annotations, but this is hard to do for fields)
Binding target = scope.parent.checkRedundantDefaultNullness(
defaultNullness | scope.localNonNullByDefaultValue(fieldDeclaration.sourceStart),
fieldDeclaration.sourceStart);
scope.recordNonNullByDefault(fieldDeclaration.binding, defaultNullness, this, fieldDeclaration.declarationSourceStart, fieldDeclaration.declarationSourceEnd);
if (target != null) {
scope.problemReporter().nullDefaultAnnotationIsRedundant(fieldDeclaration, new Annotation[]{this}, target);
}
}
// fields don't yet have their type resolved, in 1.8 null annotations
// will be transfered from the field to its type during STB.resolveTypeFor().
if ((sourceField.tagBits & TagBits.AnnotationNullMASK) == TagBits.AnnotationNullMASK) {
scope.problemReporter().contradictoryNullAnnotations(this);
sourceField.tagBits &= ~TagBits.AnnotationNullMASK; // avoid secondary problems
}
break;
case Binding.LOCAL :
LocalVariableBinding variable = (LocalVariableBinding) this.recipient;
variable.tagBits |= tagBits;
if ((variable.tagBits & TagBits.AnnotationNullMASK) == TagBits.AnnotationNullMASK) {
scope.problemReporter().contradictoryNullAnnotations(this);
variable.tagBits &= ~TagBits.AnnotationNullMASK; // avoid secondary problems
}
if ((tagBits & TagBits.AnnotationSuppressWarnings) != 0) {
LocalDeclaration localDeclaration = variable.declaration;
recordSuppressWarnings(scope, localDeclaration.declarationSourceStart, localDeclaration.declarationSourceEnd, compilerOptions.suppressWarnings);
}
// note: defaultNullness for local declarations has been already been handled earlier by handleNonNullByDefault()
break;
}
}
if (kind == Binding.TYPE) {
SourceTypeBinding sourceType = (SourceTypeBinding) this.recipient;
if (CharOperation.equals(sourceType.sourceName, TypeConstants.PACKAGE_INFO_NAME))
kind = Binding.PACKAGE;
}
checkAnnotationTarget(this, scope, annotationType, kind, this.recipient, tagBits & TagBits.AnnotationNullMASK);
}
return this.resolvedType;
}
public long handleNonNullByDefault(BlockScope scope) {
TypeBinding typeBinding = this.resolvedType;
if (typeBinding == null) {
typeBinding = this.type.resolveType(scope);
if (typeBinding == null) {
return 0;
}
this.resolvedType = typeBinding;
}
if (!typeBinding.isAnnotationType()) {
return 0;
}
ReferenceBinding annotationType = (ReferenceBinding) typeBinding;
if (!annotationType.hasNullBit(TypeIds.BitNonNullByDefaultAnnotation)) {
return 0;
}
MethodBinding[] methods = annotationType.methods();
// clone valuePairs to keep track of unused ones
MemberValuePair[] pairs = memberValuePairs();
MemberValuePair valueAttribute = null; // remember the first 'value' pair
int pairsLength = pairs.length;
for (int i = 0, requiredLength = methods.length; i < requiredLength; i++) {
MethodBinding method = methods[i];
char[] selector = method.selector;
nextPair: for (int j = 0; j < pairsLength; j++) {
MemberValuePair pair = pairs[j];
if (pair == null) continue nextPair;
char[] name = pair.name;
if (CharOperation.equals(name, selector)) {
if (valueAttribute == null && CharOperation.equals(name, TypeConstants.VALUE)) {
valueAttribute = pair;
pair.binding = method;
pair.resolveTypeExpecting(scope, method.returnType);
}
}
}
}
// recognize standard annotations ?
long tagBits = determineNonNullByDefaultTagBits(annotationType, valueAttribute);
return (int) (tagBits & Binding.NullnessDefaultMASK);
}
public enum AnnotationTargetAllowed {
YES, TYPE_ANNOTATION_ON_QUALIFIED_NAME, NO;
}
private static AnnotationTargetAllowed isAnnotationTargetAllowed(Binding recipient, BlockScope scope, TypeBinding annotationType, int kind, long metaTagBits) {
switch (kind) {
case Binding.PACKAGE :
if ((metaTagBits & TagBits.AnnotationForPackage) != 0)
return AnnotationTargetAllowed.YES;
else if (scope.compilerOptions().sourceLevel <= ClassFileConstants.JDK1_6) {
SourceTypeBinding sourceType = (SourceTypeBinding) recipient;
if (CharOperation.equals(sourceType.sourceName, TypeConstants.PACKAGE_INFO_NAME))
return AnnotationTargetAllowed.YES;
}
break;
case Binding.TYPE_USE :
if ((metaTagBits & TagBits.AnnotationForTypeUse) != 0) {
// jsr 308
return AnnotationTargetAllowed.YES;
}
if (scope.compilerOptions().sourceLevel < ClassFileConstants.JDK1_8) {
// already reported as syntax error; don't report secondary problems
return AnnotationTargetAllowed.YES;
}
break;
case Binding.TYPE :
case Binding.GENERIC_TYPE :
if (((ReferenceBinding)recipient).isAnnotationType()) {
if ((metaTagBits & (TagBits.AnnotationForAnnotationType | TagBits.AnnotationForType | TagBits.AnnotationForTypeUse)) != 0)
return AnnotationTargetAllowed.YES;
} else if ((metaTagBits & (TagBits.AnnotationForType | TagBits.AnnotationForTypeUse)) != 0) {
return AnnotationTargetAllowed.YES;
} else if ((metaTagBits & TagBits.AnnotationForPackage) != 0) {
if (CharOperation.equals(((ReferenceBinding) recipient).sourceName, TypeConstants.PACKAGE_INFO_NAME))
return AnnotationTargetAllowed.YES;
}
break;
case Binding.METHOD :
MethodBinding methodBinding = (MethodBinding) recipient;
if (methodBinding.isConstructor()) {
if ((metaTagBits & (TagBits.AnnotationForConstructor | TagBits.AnnotationForTypeUse)) != 0)
return AnnotationTargetAllowed.YES;
} else if ((metaTagBits & TagBits.AnnotationForMethod) != 0) {
return AnnotationTargetAllowed.YES;
} else if ((metaTagBits & TagBits.AnnotationForTypeUse) != 0) {
SourceTypeBinding sourceType = (SourceTypeBinding) methodBinding.declaringClass;
MethodDeclaration methodDecl = (MethodDeclaration) sourceType.scope.referenceContext.declarationOf(methodBinding);
if (isTypeUseCompatible(methodDecl.returnType, scope)) {
return AnnotationTargetAllowed.YES;
} else {
return AnnotationTargetAllowed.TYPE_ANNOTATION_ON_QUALIFIED_NAME;
}
}
break;
case Binding.FIELD :
if ((metaTagBits & TagBits.AnnotationForField) != 0) {
return AnnotationTargetAllowed.YES;
} else if ((metaTagBits & TagBits.AnnotationForTypeUse) != 0) {
FieldBinding sourceField = (FieldBinding) recipient;
SourceTypeBinding sourceType = (SourceTypeBinding) sourceField.declaringClass;
FieldDeclaration fieldDeclaration = sourceType.scope.referenceContext.declarationOf(sourceField);
if (isTypeUseCompatible(fieldDeclaration.type, scope)) {
return AnnotationTargetAllowed.YES;
} else {
return AnnotationTargetAllowed.TYPE_ANNOTATION_ON_QUALIFIED_NAME;
}
}
break;
case Binding.LOCAL :
LocalVariableBinding localVariableBinding = (LocalVariableBinding) recipient;
if ((localVariableBinding.tagBits & TagBits.IsArgument) != 0) {
if ((metaTagBits & TagBits.AnnotationForParameter) != 0) {
return AnnotationTargetAllowed.YES;
} else if ((metaTagBits & TagBits.AnnotationForTypeUse) != 0) {
if (isTypeUseCompatible(localVariableBinding.declaration.type, scope)) {
return AnnotationTargetAllowed.YES;
} else {
return AnnotationTargetAllowed.TYPE_ANNOTATION_ON_QUALIFIED_NAME;
}
}
} else if ((annotationType.tagBits & TagBits.AnnotationForLocalVariable) != 0) {
return AnnotationTargetAllowed.YES;
} else if ((metaTagBits & TagBits.AnnotationForTypeUse) != 0) {
if (localVariableBinding.declaration.isTypeNameVar(scope)) {
return AnnotationTargetAllowed.NO;
} else if (isTypeUseCompatible(localVariableBinding.declaration.type, scope)) {
return AnnotationTargetAllowed.YES;
} else {
return AnnotationTargetAllowed.TYPE_ANNOTATION_ON_QUALIFIED_NAME;
}
}
break;
case Binding.TYPE_PARAMETER : // jsr308
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=391196
if ((metaTagBits & (TagBits.AnnotationForTypeParameter | TagBits.AnnotationForTypeUse)) != 0) {
return AnnotationTargetAllowed.YES;
}
break;
case Binding.MODULE:
if ((metaTagBits & (TagBits.AnnotationForModule)) != 0) {
return AnnotationTargetAllowed.YES;
}
break;
}
return AnnotationTargetAllowed.NO;
}
public static boolean isAnnotationTargetAllowed(BlockScope scope, TypeBinding annotationType, Binding recipient) {
long metaTagBits = annotationType.getAnnotationTagBits(); // could be forward reference
if ((metaTagBits & TagBits.AnnotationTargetMASK) == 0) {
return true;
}
return isAnnotationTargetAllowed(recipient, scope, annotationType, recipient.kind(), metaTagBits)==AnnotationTargetAllowed.YES;
}
static AnnotationTargetAllowed isAnnotationTargetAllowed(Annotation annotation, BlockScope scope, TypeBinding annotationType, int kind) {
long metaTagBits = annotationType.getAnnotationTagBits(); // could be forward reference
if ((metaTagBits & TagBits.AnnotationTargetMASK) == 0) {
// does not specify any target restriction - all locations supported in Java 7 and before are possible
// TBD - revisit for modules - as per 9.6.4.1, annotation without target is applicable for module declaration
// which is listed as a declaration context, but javac does not allow this
if (kind == Binding.TYPE_PARAMETER || kind == Binding.TYPE_USE) {
scope.problemReporter().explitAnnotationTargetRequired(annotation);
}
return AnnotationTargetAllowed.YES;
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=391201
if ((metaTagBits & TagBits.SE7AnnotationTargetMASK) == 0
&& (metaTagBits & (TagBits.AnnotationForTypeUse | TagBits.AnnotationForTypeParameter)) != 0) {
if (scope.compilerOptions().sourceLevel < ClassFileConstants.JDK1_8) {
switch (kind) {
case Binding.PACKAGE :
case Binding.TYPE :
case Binding.GENERIC_TYPE :
case Binding.METHOD :
case Binding.FIELD :
case Binding.LOCAL :
scope.problemReporter().invalidUsageOfTypeAnnotations(annotation);
}
}
}
return isAnnotationTargetAllowed(annotation.recipient, scope, annotationType, kind, metaTagBits);
}
static void checkAnnotationTarget(Annotation annotation, BlockScope scope, ReferenceBinding annotationType, int kind, Binding recipient, long tagBitsToRevert) {
// check (meta)target compatibility
if (!annotationType.isValidBinding()) {
// no need to check annotation usage if missing
return;
}
AnnotationTargetAllowed annotationTargetAllowed = isAnnotationTargetAllowed(annotation, scope, annotationType, kind);
if (annotationTargetAllowed != AnnotationTargetAllowed.YES) {
if(annotationTargetAllowed == AnnotationTargetAllowed.TYPE_ANNOTATION_ON_QUALIFIED_NAME) {
scope.problemReporter().typeAnnotationAtQualifiedName(annotation);
} else {
scope.problemReporter().disallowedTargetForAnnotation(annotation);
}
if (recipient instanceof TypeBinding)
((TypeBinding)recipient).tagBits &= ~tagBitsToRevert;
}
}
/**
* Check to see if a repeating annotation is in fact of a container annotation type for an annotation which is also present at the same target.
* @param scope The scope (for error reporting)
* @param repeatedAnnotationType Type of annotation which has been repeated (to check for possibly being a container for a repeatable annotation)
* @param sourceAnnotations The annotations to check
*/
public static void checkForInstancesOfRepeatableWithRepeatingContainerAnnotation(BlockScope scope, ReferenceBinding repeatedAnnotationType, Annotation[] sourceAnnotations) {
// Fail fast if the repeating annotation type can't be a container, anyway
MethodBinding[] valueMethods = repeatedAnnotationType.getMethods(TypeConstants.VALUE);
if (valueMethods.length != 1) return; // No violations possible
TypeBinding methodReturnType = valueMethods[0].returnType;
// value must be an array
if (! methodReturnType.isArrayType() || methodReturnType.dimensions() != 1) return;
ArrayBinding array = (ArrayBinding) methodReturnType;
TypeBinding elementsType = array.elementsType();
if (! elementsType.isRepeatableAnnotationType()) return; // Can't be a problem, then
for (int i= 0; i < sourceAnnotations.length; ++i) {
Annotation annotation = sourceAnnotations[i];
if (TypeBinding.equalsEquals(elementsType, annotation.resolvedType)) {
scope.problemReporter().repeatableAnnotationWithRepeatingContainer(annotation, repeatedAnnotationType);
return; // One is enough for this annotation type
}
}
}
// Check and answer if an attempt to annotate a package is being made. Error should be reported by caller.
public static boolean isTypeUseCompatible(TypeReference reference, Scope scope) {
if (reference != null && !(reference instanceof SingleTypeReference)) {
Binding binding = scope.getPackage(reference.getTypeName());
// In case of ProblemReferenceBinding, don't report additional error
if (binding instanceof PackageBinding) {
return false;
}
}
return true;
}
// Complain if an attempt to annotate the enclosing type of a static member type is being made.
public static void isTypeUseCompatible(TypeReference reference, Scope scope, Annotation[] annotations) {
if (annotations == null || reference == null || reference.getAnnotatableLevels() == 1)
return;
if (scope.environment().globalOptions.sourceLevel < ClassFileConstants.JDK1_8)
return;
TypeBinding resolvedType = reference.resolvedType == null ? null : reference.resolvedType.leafComponentType();
if (resolvedType == null || !resolvedType.isNestedType())
return;
nextAnnotation:
for (int i = 0, annotationsLength = annotations.length; i < annotationsLength; i++) {
Annotation annotation = annotations[i];
long metaTagBits = annotation.resolvedType.getAnnotationTagBits();
if ((metaTagBits & TagBits.AnnotationForTypeUse) != 0 && (metaTagBits & TagBits.SE7AnnotationTargetMASK) == 0) {
ReferenceBinding currentType = (ReferenceBinding) resolvedType;
while (currentType.isNestedType()) {
if (currentType.isStatic()) {
QualifiedTypeReference.rejectAnnotationsOnStaticMemberQualififer(scope, currentType, new Annotation [] { annotation });
continue nextAnnotation;
} else {
if (annotation.hasNullBit(TypeIds.BitNonNullAnnotation|TypeIds.BitNullableAnnotation)) {
scope.problemReporter().nullAnnotationAtQualifyingType(annotation);
continue nextAnnotation;
}
}
currentType = currentType.enclosingType();
}
}
}
}
public boolean hasNullBit(int bit) {
return this.resolvedType instanceof ReferenceBinding && ((ReferenceBinding) this.resolvedType).hasNullBit(bit);
}
@Override
public abstract void traverse(ASTVisitor visitor, BlockScope scope);
@Override
public abstract void traverse(ASTVisitor visitor, ClassScope scope);
public Annotation getPersistibleAnnotation() {
return this.persistibleAnnotation; // will be this for non-repeating annotation, the container for the first of the repeating ones and null for the followers.
}
public void setPersistibleAnnotation(ContainerAnnotation container) {
this.persistibleAnnotation = container; // will be a legitimate container for the first of the repeating ones and null for the followers.
}
}