org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/lookup/CaptureBinding.java - aspectj/org.aspectj.shadows - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2009 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.internal.compiler.lookup;

 import org.eclipse.jdt.core.compiler.CharOperation;
 import org.eclipse.jdt.internal.compiler.ast.Wildcard;
 import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;

 public class CaptureBinding extends TypeVariableBinding {

 	public TypeBinding lowerBound;
 	public WildcardBinding wildcard;
 	public int captureID;

 	/* information to compute unique binding key */
 	public ReferenceBinding sourceType;
 	public int position;

 	public CaptureBinding(WildcardBinding wildcard, ReferenceBinding sourceType, int position, int captureID) {
 		super(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX, null, 0, wildcard.environment);
 		this.wildcard = wildcard;
 		this.modifiers = ClassFileConstants.AccPublic | ExtraCompilerModifiers.AccGenericSignature; // treat capture as public
 		this.fPackage = wildcard.fPackage;
 		this.sourceType = sourceType;
 		this.position = position;
 		this.captureID = captureID;
 	}

 	/*
 	 * sourceTypeKey ! wildcardKey position semi-colon
 	 * p.X { capture of ? } --> !*123; (Lp/X; in declaring type except if leaf)
 	 * p.X { capture of ? extends p.Y } --> !+Lp/Y;123; (Lp/X; in declaring type except if leaf)
 	 */
 	public char[] computeUniqueKey(boolean isLeaf) {
 		StringBuffer buffer = new StringBuffer();
 		if (isLeaf) {
 			buffer.append(this.sourceType.computeUniqueKey(false/*not a leaf*/));
 			buffer.append('&');
 		}
 		buffer.append(TypeConstants.WILDCARD_CAPTURE);
 		buffer.append(this.wildcard.computeUniqueKey(false/*not a leaf*/));
 		buffer.append(this.position);
 		buffer.append(';');
 		int length = buffer.length();
 		char[] uniqueKey = new char[length];
 		buffer.getChars(0, length, uniqueKey, 0);
 		return uniqueKey;
 	}

 	public String debugName() {

 		if (this.wildcard != null) {
 			StringBuffer buffer = new StringBuffer(10);
 			buffer
 				.append(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX)
 				.append(this.captureID)
 				.append(TypeConstants.WILDCARD_CAPTURE_NAME_SUFFIX)
 				.append(this.wildcard.debugName());
 			return buffer.toString();
 		}
 		return super.debugName();
 	}

 	public char[] genericTypeSignature() {
 		if (this.genericTypeSignature == null) {
 			this.genericTypeSignature = CharOperation.concat(TypeConstants.WILDCARD_CAPTURE, this.wildcard.genericTypeSignature());
 		}
 		return this.genericTypeSignature;
 	}

 	/**
 	 * Initialize capture bounds using substituted supertypes
 	 * e.g. given X<U, V extends X<U, V>>,     capture(X<E,?>) = X<E,capture>, where capture extends X<E,capture>
 	 */
 	public void initializeBounds(Scope scope, ParameterizedTypeBinding capturedParameterizedType) {
 		TypeVariableBinding wildcardVariable = this.wildcard.typeVariable();
 		if (wildcardVariable == null) {
 			// error resilience when capturing Zork<?>
 			// no substitution for wildcard bound (only formal bounds from type variables are to be substituted: 104082)
 			TypeBinding originalWildcardBound = this.wildcard.bound;
 			switch (this.wildcard.boundKind) {
 				case Wildcard.EXTENDS :
 					// still need to capture bound supertype as well so as not to expose wildcards to the outside (111208)
 					TypeBinding capturedWildcardBound = originalWildcardBound.capture(scope, this.position);
 					if (originalWildcardBound.isInterface()) {
 						this.superclass = scope.getJavaLangObject();
 						this.superInterfaces = new ReferenceBinding[] { (ReferenceBinding) capturedWildcardBound };
 					} else {
 						// the wildcard bound should be a subtype of variable superclass
 						// it may occur that the bound is less specific, then consider glb (202404)
 						if (capturedWildcardBound.isArrayType() || capturedWildcardBound == this) {
 							this.superclass = scope.getJavaLangObject();
 						} else {
 							this.superclass = (ReferenceBinding) capturedWildcardBound;
 						}
 						this.superInterfaces = Binding.NO_SUPERINTERFACES;
 					}
 					this.firstBound =  capturedWildcardBound;
 					if ((capturedWildcardBound.tagBits & TagBits.HasTypeVariable) == 0)
 						this.tagBits &= ~TagBits.HasTypeVariable;
 					break;
 				case Wildcard.UNBOUND :
 					this.superclass = scope.getJavaLangObject();
 					this.superInterfaces = Binding.NO_SUPERINTERFACES;
 					this.tagBits &= ~TagBits.HasTypeVariable;
 					break;
 				case Wildcard.SUPER :
 					this.superclass = scope.getJavaLangObject();
 					this.superInterfaces = Binding.NO_SUPERINTERFACES;
 					this.lowerBound = this.wildcard.bound;
 					if ((originalWildcardBound.tagBits & TagBits.HasTypeVariable) == 0)
 						this.tagBits &= ~TagBits.HasTypeVariable;
 					break;
 			}
 			return;
 		}
 		ReferenceBinding originalVariableSuperclass = wildcardVariable.superclass;
 		ReferenceBinding substitutedVariableSuperclass = (ReferenceBinding) Scope.substitute(capturedParameterizedType, originalVariableSuperclass);
 		// prevent cyclic capture: given X<T>, capture(X<? extends T> could yield a circular type
 		if (substitutedVariableSuperclass == this) substitutedVariableSuperclass = originalVariableSuperclass;

 		ReferenceBinding[] originalVariableInterfaces = wildcardVariable.superInterfaces();
 		ReferenceBinding[] substitutedVariableInterfaces = Scope.substitute(capturedParameterizedType, originalVariableInterfaces);
 		if (substitutedVariableInterfaces != originalVariableInterfaces) {
 			// prevent cyclic capture: given X<T>, capture(X<? extends T> could yield a circular type
 			for (int i = 0, length = substitutedVariableInterfaces.length; i < length; i++) {
 				if (substitutedVariableInterfaces[i] == this) substitutedVariableInterfaces[i] = originalVariableInterfaces[i];
 			}
 		}
 		// no substitution for wildcard bound (only formal bounds from type variables are to be substituted: 104082)
 		TypeBinding originalWildcardBound = this.wildcard.bound;

 		switch (this.wildcard.boundKind) {
 			case Wildcard.EXTENDS :
 				// still need to capture bound supertype as well so as not to expose wildcards to the outside (111208)
 				TypeBinding capturedWildcardBound = originalWildcardBound.capture(scope, this.position);
 				if (originalWildcardBound.isInterface()) {
 					this.superclass = substitutedVariableSuperclass;
 					// merge wildcard bound into variable superinterfaces using glb
 					if (substitutedVariableInterfaces == Binding.NO_SUPERINTERFACES) {
 						this.superInterfaces = new ReferenceBinding[] { (ReferenceBinding) capturedWildcardBound };
 					} else {
 						int length = substitutedVariableInterfaces.length;
 						System.arraycopy(substitutedVariableInterfaces, 0, substitutedVariableInterfaces = new ReferenceBinding[length+1], 1, length);
 						substitutedVariableInterfaces[0] =  (ReferenceBinding) capturedWildcardBound;
 						this.superInterfaces = Scope.greaterLowerBound(substitutedVariableInterfaces);
 					}
 				} else {
 					// the wildcard bound should be a subtype of variable superclass
 					// it may occur that the bound is less specific, then consider glb (202404)
 					if (capturedWildcardBound.isArrayType() || capturedWildcardBound == this) {
 						this.superclass = substitutedVariableSuperclass;
 					} else {
 						this.superclass = (ReferenceBinding) capturedWildcardBound;
 						if (this.superclass.isSuperclassOf(substitutedVariableSuperclass)) {
 							this.superclass = substitutedVariableSuperclass;
 						}
 					}
 					this.superInterfaces = substitutedVariableInterfaces;
 				}
 				this.firstBound =  capturedWildcardBound;
 				if ((capturedWildcardBound.tagBits & TagBits.HasTypeVariable) == 0)
 					this.tagBits &= ~TagBits.HasTypeVariable;
 				break;
 			case Wildcard.UNBOUND :
 				this.superclass = substitutedVariableSuperclass;
 				this.superInterfaces = substitutedVariableInterfaces;
 				this.tagBits &= ~TagBits.HasTypeVariable;
 				break;
 			case Wildcard.SUPER :
 				this.superclass = substitutedVariableSuperclass;
 				if (wildcardVariable.firstBound == substitutedVariableSuperclass || originalWildcardBound == substitutedVariableSuperclass) {
 					this.firstBound = substitutedVariableSuperclass;
 				}
 				this.superInterfaces = substitutedVariableInterfaces;
 				this.lowerBound = originalWildcardBound;
 				if ((originalWildcardBound.tagBits & TagBits.HasTypeVariable) == 0)
 					this.tagBits &= ~TagBits.HasTypeVariable;
 				break;
 		}
 	}

 	/**
 	 * @see org.eclipse.jdt.internal.compiler.lookup.TypeBinding#isCapture()
 	 */
 	public boolean isCapture() {
 		return true;
 	}

 	/**
 	 * @see TypeBinding#isEquivalentTo(TypeBinding)
 	 */
 	public boolean isEquivalentTo(TypeBinding otherType) {
 	    if (this == otherType) return true;
 	    if (otherType == null) return false;
 		// capture of ? extends X[]
 		if (this.firstBound != null && this.firstBound.isArrayType()) {
 			if (this.firstBound.isCompatibleWith(otherType))
 				return true;
 		}
 		switch (otherType.kind()) {
 			case Binding.WILDCARD_TYPE :
 			case Binding.INTERSECTION_TYPE :
 				return ((WildcardBinding) otherType).boundCheck(this);
 		}
 		return false;
 	}

 	public char[] readableName() {
 		if (this.wildcard != null) {
 			StringBuffer buffer = new StringBuffer(10);
 			buffer
 				.append(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX)
 				.append(this.captureID)
 				.append(TypeConstants.WILDCARD_CAPTURE_NAME_SUFFIX)
 				.append(this.wildcard.readableName());
 			int length = buffer.length();
 			char[] name = new char[length];
 			buffer.getChars(0, length, name, 0);
 			return name;
 		}
 		return super.readableName();
 	}

 	public char[] shortReadableName() {
 		if (this.wildcard != null) {
 			StringBuffer buffer = new StringBuffer(10);
 			buffer
 				.append(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX)
 				.append(this.captureID)
 				.append(TypeConstants.WILDCARD_CAPTURE_NAME_SUFFIX)
 				.append(this.wildcard.shortReadableName());
 			int length = buffer.length();
 			char[] name = new char[length];
 			buffer.getChars(0, length, name, 0);
 			return name;
 		}
 		return super.shortReadableName();
 	}

 	public String toString() {
 		if (this.wildcard != null) {
 			StringBuffer buffer = new StringBuffer(10);
 			buffer
 				.append(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX)
 				.append(this.captureID)
 				.append(TypeConstants.WILDCARD_CAPTURE_NAME_SUFFIX)
 				.append(this.wildcard);
 			return buffer.toString();
 		}
 		return super.toString();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2009 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.internal.compiler.lookup;

	import org.eclipse.jdt.core.compiler.CharOperation;
	import org.eclipse.jdt.internal.compiler.ast.Wildcard;
	import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;

	public class CaptureBinding extends TypeVariableBinding {

	public TypeBinding lowerBound;
	public WildcardBinding wildcard;
	public int captureID;

	/* information to compute unique binding key */
	public ReferenceBinding sourceType;
	public int position;

	public CaptureBinding(WildcardBinding wildcard, ReferenceBinding sourceType, int position, int captureID) {
	super(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX, null, 0, wildcard.environment);
	this.wildcard = wildcard;
	this.modifiers = ClassFileConstants.AccPublic \| ExtraCompilerModifiers.AccGenericSignature; // treat capture as public
	this.fPackage = wildcard.fPackage;
	this.sourceType = sourceType;
	this.position = position;
	this.captureID = captureID;
	}

	/*
	* sourceTypeKey ! wildcardKey position semi-colon
	* p.X { capture of ? } --> !*123; (Lp/X; in declaring type except if leaf)
	* p.X { capture of ? extends p.Y } --> !+Lp/Y;123; (Lp/X; in declaring type except if leaf)
	*/
	public char[] computeUniqueKey(boolean isLeaf) {
	StringBuffer buffer = new StringBuffer();
	if (isLeaf) {
	buffer.append(this.sourceType.computeUniqueKey(false/not a leaf/));
	buffer.append('&');
	}
	buffer.append(TypeConstants.WILDCARD_CAPTURE);
	buffer.append(this.wildcard.computeUniqueKey(false/not a leaf/));
	buffer.append(this.position);
	buffer.append(';');
	int length = buffer.length();
	char[] uniqueKey = new char[length];
	buffer.getChars(0, length, uniqueKey, 0);
	return uniqueKey;
	}

	public String debugName() {

	if (this.wildcard != null) {
	StringBuffer buffer = new StringBuffer(10);
	buffer
	.append(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX)
	.append(this.captureID)
	.append(TypeConstants.WILDCARD_CAPTURE_NAME_SUFFIX)
	.append(this.wildcard.debugName());
	return buffer.toString();
	}
	return super.debugName();
	}

	public char[] genericTypeSignature() {
	if (this.genericTypeSignature == null) {
	this.genericTypeSignature = CharOperation.concat(TypeConstants.WILDCARD_CAPTURE, this.wildcard.genericTypeSignature());
	}
	return this.genericTypeSignature;
	}

	/**
	* Initialize capture bounds using substituted supertypes
	* e.g. given X<U, V extends X<U, V>>, capture(X<E,?>) = X<E,capture>, where capture extends X<E,capture>
	*/
	public void initializeBounds(Scope scope, ParameterizedTypeBinding capturedParameterizedType) {
	TypeVariableBinding wildcardVariable = this.wildcard.typeVariable();
	if (wildcardVariable == null) {
	// error resilience when capturing Zork<?>
	// no substitution for wildcard bound (only formal bounds from type variables are to be substituted: 104082)
	TypeBinding originalWildcardBound = this.wildcard.bound;
	switch (this.wildcard.boundKind) {
	case Wildcard.EXTENDS :
	// still need to capture bound supertype as well so as not to expose wildcards to the outside (111208)
	TypeBinding capturedWildcardBound = originalWildcardBound.capture(scope, this.position);
	if (originalWildcardBound.isInterface()) {
	this.superclass = scope.getJavaLangObject();
	this.superInterfaces = new ReferenceBinding[] { (ReferenceBinding) capturedWildcardBound };
	} else {
	// the wildcard bound should be a subtype of variable superclass
	// it may occur that the bound is less specific, then consider glb (202404)
	if (capturedWildcardBound.isArrayType() \|\| capturedWildcardBound == this) {
	this.superclass = scope.getJavaLangObject();
	} else {
	this.superclass = (ReferenceBinding) capturedWildcardBound;
	}
	this.superInterfaces = Binding.NO_SUPERINTERFACES;
	}
	this.firstBound = capturedWildcardBound;
	if ((capturedWildcardBound.tagBits & TagBits.HasTypeVariable) == 0)
	this.tagBits &= ~TagBits.HasTypeVariable;
	break;
	case Wildcard.UNBOUND :
	this.superclass = scope.getJavaLangObject();
	this.superInterfaces = Binding.NO_SUPERINTERFACES;
	this.tagBits &= ~TagBits.HasTypeVariable;
	break;
	case Wildcard.SUPER :
	this.superclass = scope.getJavaLangObject();
	this.superInterfaces = Binding.NO_SUPERINTERFACES;
	this.lowerBound = this.wildcard.bound;
	if ((originalWildcardBound.tagBits & TagBits.HasTypeVariable) == 0)
	this.tagBits &= ~TagBits.HasTypeVariable;
	break;
	}
	return;
	}
	ReferenceBinding originalVariableSuperclass = wildcardVariable.superclass;
	ReferenceBinding substitutedVariableSuperclass = (ReferenceBinding) Scope.substitute(capturedParameterizedType, originalVariableSuperclass);
	// prevent cyclic capture: given X<T>, capture(X<? extends T> could yield a circular type
	if (substitutedVariableSuperclass == this) substitutedVariableSuperclass = originalVariableSuperclass;

	ReferenceBinding[] originalVariableInterfaces = wildcardVariable.superInterfaces();
	ReferenceBinding[] substitutedVariableInterfaces = Scope.substitute(capturedParameterizedType, originalVariableInterfaces);
	if (substitutedVariableInterfaces != originalVariableInterfaces) {
	// prevent cyclic capture: given X<T>, capture(X<? extends T> could yield a circular type
	for (int i = 0, length = substitutedVariableInterfaces.length; i < length; i++) {
	if (substitutedVariableInterfaces[i] == this) substitutedVariableInterfaces[i] = originalVariableInterfaces[i];
	}
	}
	// no substitution for wildcard bound (only formal bounds from type variables are to be substituted: 104082)
	TypeBinding originalWildcardBound = this.wildcard.bound;

	switch (this.wildcard.boundKind) {
	case Wildcard.EXTENDS :
	// still need to capture bound supertype as well so as not to expose wildcards to the outside (111208)
	TypeBinding capturedWildcardBound = originalWildcardBound.capture(scope, this.position);
	if (originalWildcardBound.isInterface()) {
	this.superclass = substitutedVariableSuperclass;
	// merge wildcard bound into variable superinterfaces using glb
	if (substitutedVariableInterfaces == Binding.NO_SUPERINTERFACES) {
	this.superInterfaces = new ReferenceBinding[] { (ReferenceBinding) capturedWildcardBound };
	} else {
	int length = substitutedVariableInterfaces.length;
	System.arraycopy(substitutedVariableInterfaces, 0, substitutedVariableInterfaces = new ReferenceBinding[length+1], 1, length);
	substitutedVariableInterfaces[0] = (ReferenceBinding) capturedWildcardBound;
	this.superInterfaces = Scope.greaterLowerBound(substitutedVariableInterfaces);
	}
	} else {
	// the wildcard bound should be a subtype of variable superclass
	// it may occur that the bound is less specific, then consider glb (202404)
	if (capturedWildcardBound.isArrayType() \|\| capturedWildcardBound == this) {
	this.superclass = substitutedVariableSuperclass;
	} else {
	this.superclass = (ReferenceBinding) capturedWildcardBound;
	if (this.superclass.isSuperclassOf(substitutedVariableSuperclass)) {
	this.superclass = substitutedVariableSuperclass;
	}
	}
	this.superInterfaces = substitutedVariableInterfaces;
	}
	this.firstBound = capturedWildcardBound;
	if ((capturedWildcardBound.tagBits & TagBits.HasTypeVariable) == 0)
	this.tagBits &= ~TagBits.HasTypeVariable;
	break;
	case Wildcard.UNBOUND :
	this.superclass = substitutedVariableSuperclass;
	this.superInterfaces = substitutedVariableInterfaces;
	this.tagBits &= ~TagBits.HasTypeVariable;
	break;
	case Wildcard.SUPER :
	this.superclass = substitutedVariableSuperclass;
	if (wildcardVariable.firstBound == substitutedVariableSuperclass \|\| originalWildcardBound == substitutedVariableSuperclass) {
	this.firstBound = substitutedVariableSuperclass;
	}
	this.superInterfaces = substitutedVariableInterfaces;
	this.lowerBound = originalWildcardBound;
	if ((originalWildcardBound.tagBits & TagBits.HasTypeVariable) == 0)
	this.tagBits &= ~TagBits.HasTypeVariable;
	break;
	}
	}

	/**
	* @see org.eclipse.jdt.internal.compiler.lookup.TypeBinding#isCapture()
	*/
	public boolean isCapture() {
	return true;
	}

	/**
	* @see TypeBinding#isEquivalentTo(TypeBinding)
	*/
	public boolean isEquivalentTo(TypeBinding otherType) {
	if (this == otherType) return true;
	if (otherType == null) return false;
	// capture of ? extends X[]
	if (this.firstBound != null && this.firstBound.isArrayType()) {
	if (this.firstBound.isCompatibleWith(otherType))
	return true;
	}
	switch (otherType.kind()) {
	case Binding.WILDCARD_TYPE :
	case Binding.INTERSECTION_TYPE :
	return ((WildcardBinding) otherType).boundCheck(this);
	}
	return false;
	}

	public char[] readableName() {
	if (this.wildcard != null) {
	StringBuffer buffer = new StringBuffer(10);
	buffer
	.append(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX)
	.append(this.captureID)
	.append(TypeConstants.WILDCARD_CAPTURE_NAME_SUFFIX)
	.append(this.wildcard.readableName());
	int length = buffer.length();
	char[] name = new char[length];
	buffer.getChars(0, length, name, 0);
	return name;
	}
	return super.readableName();
	}

	public char[] shortReadableName() {
	if (this.wildcard != null) {
	StringBuffer buffer = new StringBuffer(10);
	buffer
	.append(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX)
	.append(this.captureID)
	.append(TypeConstants.WILDCARD_CAPTURE_NAME_SUFFIX)
	.append(this.wildcard.shortReadableName());
	int length = buffer.length();
	char[] name = new char[length];
	buffer.getChars(0, length, name, 0);
	return name;
	}
	return super.shortReadableName();
	}

	public String toString() {
	if (this.wildcard != null) {
	StringBuffer buffer = new StringBuffer(10);
	buffer
	.append(TypeConstants.WILDCARD_CAPTURE_NAME_PREFIX)
	.append(this.captureID)
	.append(TypeConstants.WILDCARD_CAPTURE_NAME_SUFFIX)
	.append(this.wildcard);
	return buffer.toString();
	}
	return super.toString();
	}
	}