| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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.corext.refactoring.typeconstraints.types; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.jdt.core.dom.ITypeBinding; |
| |
| |
| |
| public final class CaptureType extends AbstractTypeVariable { |
| |
| private WildcardType fWildcard; |
| private IJavaProject fJavaProject; |
| |
| protected CaptureType(TypeEnvironment environment) { |
| super(environment); |
| } |
| |
| protected void initialize(ITypeBinding binding, IJavaProject javaProject) { |
| Assert.isTrue(binding.isCapture()); |
| super.initialize(binding); |
| fWildcard= (WildcardType) getEnvironment().create(binding.getWildcard()); |
| fJavaProject= javaProject; |
| } |
| |
| public int getKind() { |
| return CAPTURE_TYPE; |
| } |
| |
| public WildcardType getWildcard() { |
| return fWildcard; |
| } |
| |
| public boolean doEquals(TType type) { |
| return getBindingKey().equals(((CaptureType)type).getBindingKey()) |
| && fJavaProject.equals(((CaptureType)type).fJavaProject); |
| } |
| |
| public int hashCode() { |
| return getBindingKey().hashCode(); |
| } |
| |
| protected boolean doCanAssignTo(TType lhs) { |
| switch (lhs.getKind()) { |
| case NULL_TYPE: |
| case VOID_TYPE: |
| case PRIMITIVE_TYPE: |
| return false; |
| |
| case ARRAY_TYPE: |
| return canAssignFirstBoundTo(lhs); |
| |
| case GENERIC_TYPE: |
| return false; |
| |
| case STANDARD_TYPE: |
| case PARAMETERIZED_TYPE: |
| case RAW_TYPE: |
| return canAssignOneBoundTo(lhs); |
| |
| case UNBOUND_WILDCARD_TYPE: |
| case EXTENDS_WILDCARD_TYPE: |
| case SUPER_WILDCARD_TYPE: |
| return ((WildcardType)lhs).checkAssignmentBound(this); |
| |
| case TYPE_VARIABLE: |
| return false; //fWildcard.doCanAssignTo(lhs); |
| |
| case CAPTURE_TYPE: |
| return ((CaptureType)lhs).checkLowerBound(this.getWildcard()); |
| |
| } |
| return false; |
| } |
| |
| protected boolean checkLowerBound(TType rhs) { |
| if (! getWildcard().isSuperWildcardType()) |
| return false; |
| |
| return rhs.canAssignTo(getWildcard().getBound()); |
| } |
| |
| private boolean canAssignFirstBoundTo(TType lhs) { |
| if (fBounds.length > 0 && fBounds[0].isArrayType()) { |
| // capture of ? extends X[] |
| return fBounds[0].canAssignTo(lhs); |
| } |
| return false; |
| } |
| |
| public String getName() { |
| return ""; //$NON-NLS-1$ |
| } |
| |
| protected String getPlainPrettySignature() { |
| return "capture-of " + fWildcard.getPrettySignature(); //$NON-NLS-1$ |
| } |
| } |