79 lines
1.9 KiB
Java
79 lines
1.9 KiB
Java
/*******************************************************************************
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* Copyright (c) 2007 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.ipa.callgraph;
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/**
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* A context that first checks with A, then defaults to B.
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*/
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public class DelegatingContext implements Context {
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private final Context A;
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private final Context B;
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public DelegatingContext(Context A, Context B) {
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this.A = A;
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this.B = B;
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if (A == null) {
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throw new IllegalArgumentException("null A");
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}
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if (B == null) {
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throw new IllegalArgumentException("null B");
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}
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}
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@Override
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public ContextItem get(ContextKey name) {
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ContextItem result = A.get(name);
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if (result == null) {
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result = B.get(name);
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}
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return result;
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}
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@Override
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public int hashCode() {
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final int prime = 31;
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int result = 1;
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result = prime * result + A.hashCode();
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result = prime * result + B.hashCode();
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return result;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj)
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return true;
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if (obj == null)
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return false;
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if (getClass() != obj.getClass())
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return false;
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DelegatingContext other = (DelegatingContext) obj;
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if (!A.equals(other.A))
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return false;
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if (!B.equals(other.B))
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return false;
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return true;
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}
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@Override
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public String toString() {
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return "DelegatingContext [A=" + A + ", B=" + B + "]";
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}
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@Override
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public boolean isA(Class<? extends Context> type) {
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return A.isA(type) || B.isA(type);
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}
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}
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