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/*******************************************************************************
* Copyright (c) 2019 Simeon Andreev 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:
* Simeon Andreev - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.lookup;
/**
* Defines a wrapper type for {@link ReferenceBinding} and provides proper hashCode() and equals() based on the wrapped
* {@link ReferenceBinding} object identity comparison.
* <p>
* Note: {@link ReferenceBinding} defines a hashCode() which is not consistent with the respective equals()
* implementation).
*/
final class ReferenceBindingSetWrapper {
final ReferenceBinding referenceBinding;
private int hashCode;
ReferenceBindingSetWrapper(ReferenceBinding referenceBinding) {
this.referenceBinding = referenceBinding;
this.hashCode = referenceBinding.identityHashCode();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj instanceof ReferenceBindingSetWrapper) {
ReferenceBindingSetWrapper other = (ReferenceBindingSetWrapper) obj;
return identityEqual(this.referenceBinding, other.referenceBinding);
}
return false;
}
private static boolean identityEqual(Object o1, Object o2) {
return o1 == o2;
}
@Override
public int hashCode() {
return this.hashCode;
}
@Override
public String toString() {
return this.referenceBinding.toString();
}
}
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