| /******************************************************************************* |
| * Copyright (c) 2013, 2014 GK Software AG 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: |
| * Stephan Herrmann - initial API and implementation |
| * IBM Corporation - bug fixes |
| *******************************************************************************/ |
| package org.aspectj.org.eclipse.jdt.internal.compiler.lookup; |
| |
| import org.aspectj.org.eclipse.jdt.core.compiler.CharOperation; |
| |
| /** |
| * Implementation of 18.1.3 in JLS8 |
| */ |
| public class TypeBound extends ReductionResult { |
| |
| InferenceVariable left; |
| |
| // this flag contributes to the workaround controlled by InferenceContext18.ARGUMENT_CONSTRAINTS_ARE_SOFT: |
| boolean isSoft; |
| |
| // here we accumulate null tagBits from any types that have been related to this type bound during incorporation: |
| long nullHints; |
| |
| static TypeBound createBoundOrDependency(InferenceContext18 context, TypeBinding type, InferenceVariable variable) { |
| // Part of JLS8 sect 18.1.3: |
| return new TypeBound(variable, context.substitute(type), SUBTYPE, true); |
| } |
| |
| /** Create a true type bound or a dependency. */ |
| TypeBound(InferenceVariable inferenceVariable, TypeBinding typeBinding, int relation) { |
| this.left = inferenceVariable; |
| this.right = safeType(typeBinding); |
| this.relation = relation; |
| } |
| |
| TypeBound(InferenceVariable inferenceVariable, TypeBinding typeBinding, int relation, boolean isSoft) { |
| this.left = inferenceVariable; |
| this.right = safeType(typeBinding); |
| this.relation = relation; |
| this.isSoft = isSoft; |
| } |
| |
| private TypeBinding safeType(TypeBinding type) { |
| if (type != null && type.isLocalType()) { |
| MethodBinding enclosingMethod = ((LocalTypeBinding) type).enclosingMethod; |
| if (enclosingMethod != null && CharOperation.prefixEquals(TypeConstants.ANONYMOUS_METHOD, enclosingMethod.selector)) |
| return type.superclass(); // don't use local class inside lambda: lambda is copied, type will be re-created and thus is unmatchable |
| } |
| return type; |
| } |
| |
| |
| /** distinguish bounds from dependencies. */ |
| boolean isBound() { |
| return this.right.isProperType(true); |
| } |
| public int hashCode() { |
| return this.left.hashCode() + this.right.hashCode() + this.relation; |
| } |
| public boolean equals(Object obj) { |
| if (obj instanceof TypeBound) { |
| TypeBound other = (TypeBound) obj; |
| return this.left == other.left && TypeBinding.equalsEquals(this.right, other.right) && this.relation == other.relation; //$IDENTITY-COMPARISON$ InferenceVariable |
| } |
| return false; |
| } |
| |
| // debugging: |
| public String toString() { |
| boolean isBound = this.right.isProperType(true); |
| StringBuffer buf = new StringBuffer(); |
| buf.append(isBound ? "TypeBound " : "Dependency "); //$NON-NLS-1$ //$NON-NLS-2$ |
| buf.append(this.left.sourceName); |
| buf.append(relationToString(this.relation)); |
| buf.append(this.right.readableName()); |
| return buf.toString(); |
| } |
| } |