| /******************************************************************************* |
| * Copyright (c) 2000, 2016 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 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jdt.core.ITypeParameter; |
| import org.eclipse.jdt.core.dom.ITypeBinding; |
| |
| |
| |
| public final class TypeVariable extends AbstractTypeVariable { |
| |
| private ITypeParameter fJavaTypeParameter; |
| |
| protected TypeVariable(TypeEnvironment environment) { |
| super(environment); |
| } |
| |
| protected void initialize(ITypeBinding binding, ITypeParameter javaTypeParameter) { |
| Assert.isTrue(binding.isTypeVariable()); |
| Assert.isNotNull(javaTypeParameter); |
| fJavaTypeParameter= javaTypeParameter; |
| super.initialize(binding); |
| } |
| |
| @Override |
| public int getKind() { |
| return TYPE_VARIABLE; |
| } |
| |
| @Override |
| public boolean doEquals(TType type) { |
| return fJavaTypeParameter.equals(((TypeVariable)type).fJavaTypeParameter); |
| } |
| |
| @Override |
| public int hashCode() { |
| return fJavaTypeParameter.hashCode(); |
| } |
| |
| @Override |
| protected boolean doCanAssignTo(TType lhs) { |
| switch (lhs.getKind()) { |
| case NULL_TYPE: |
| case VOID_TYPE: return false; |
| case PRIMITIVE_TYPE: |
| |
| case ARRAY_TYPE: return false; |
| |
| 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 doExtends((TypeVariable)lhs); |
| case CAPTURE_TYPE: |
| return ((CaptureType)lhs).checkLowerBound(this); |
| } |
| return false; |
| } |
| |
| private boolean doExtends(TypeVariable other) { |
| for (int i= 0; i < fBounds.length; i++) { |
| TType bound= fBounds[i]; |
| if (other.equals(bound) || (bound.getKind() == TYPE_VARIABLE && ((TypeVariable)bound).doExtends(other))) |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public String getName() { |
| return fJavaTypeParameter.getElementName(); |
| } |
| |
| @Override |
| public String getPrettySignature() { |
| if (fBounds.length == 1 && fBounds[0].isJavaLangObject()) |
| return fJavaTypeParameter.getElementName(); // don't print the trivial bound |
| |
| StringBuilder result= new StringBuilder(fJavaTypeParameter.getElementName()); |
| if (fBounds.length > 0) { |
| result.append(" extends "); //$NON-NLS-1$ |
| result.append(fBounds[0].getPlainPrettySignature()); |
| for (int i= 1; i < fBounds.length; i++) { |
| result.append(" & "); //$NON-NLS-1$ |
| result.append(fBounds[i].getPlainPrettySignature()); |
| } |
| } |
| return result.toString(); |
| } |
| |
| @Override |
| protected String getPlainPrettySignature() { |
| return fJavaTypeParameter.getElementName(); |
| } |
| } |