Mercurial > projects > dwt2
diff org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/value/ValueDiff.d @ 95:6208d4f6a277
Added trees for databinding.beans and observable
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 21 Apr 2009 10:55:51 +0200 |
parents | |
children | b74ac5dfcc06 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/value/ValueDiff.d Tue Apr 21 10:55:51 2009 +0200 @@ -0,0 +1,73 @@ +/******************************************************************************* + * Copyright (c) 2006, 2007 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.core.databinding.observable.value; + +import org.eclipse.core.databinding.observable.Diffs; + +/** + * @since 1.0 + * + */ +public abstract class ValueDiff { + /** + * Creates a value diff. + */ + public this() { + } + + /** + * @return the old value + */ + public abstract Object getOldValue(); + + /** + * @return the new value + */ + public abstract Object getNewValue(); + + public override equals_t opEquals(Object obj) { + if ( null !is cast(ValueDiff)obj ) { + ValueDiff val = cast(ValueDiff) obj; + + return Diffs.equals(val.getNewValue(), getNewValue()) + && Diffs.equals(val.getOldValue(), getOldValue()); + + } + return false; + } + + public override hash_t toHash() { + final int prime = 31; + int result = 1; + Object nv = getNewValue(); + Object ov = getOldValue(); + result = prime * result + ((nv is null) ? 0 : nv.hashCode()); + result = prime * result + ((ov is null) ? 0 : ov.hashCode()); + return result; + } + + /** + * @see java.lang.Object#toString() + */ + public String toString() { + StringBuffer buffer = new StringBuffer(); + buffer + .append(getClass().getName()) + .append("{oldValue [") //$NON-NLS-1$ + .append(getOldValue() !is null ? getOldValue().toString() : "null") //$NON-NLS-1$ + .append("], newValue [") //$NON-NLS-1$ + .append(getNewValue() !is null ? getNewValue().toString() : "null") //$NON-NLS-1$ + .append("]}"); //$NON-NLS-1$ + + return buffer.toString(); + } +}