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/*******************************************************************************
* Copyright (c) 2008, 2016 Oracle. 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:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.jpa.ui.internal;
import org.eclipse.jpt.common.ui.JptCommonUiMessages;
import org.eclipse.jpt.common.utility.internal.transformer.TransformerAdapter;
import org.eclipse.osgi.util.NLS;
/**
* Transform a {@link Boolean} value into a UI string.
* If the value is non-<code>null</code>, bind it to the supplied string.
* If the value is <code>null</code>, convert it into the supplied null string,
* which can, itself, be <code>null</code>.
*
* @see TriStateCheckBoxLabelModelAdapter
*/
public class TriStateCheckBoxLabelModelStringTransformer
extends TransformerAdapter<Boolean, String>
{
private final String string;
private final String nullString;
public TriStateCheckBoxLabelModelStringTransformer(String string, String nullString) {
super();
if (string == null) {
throw new NullPointerException();
}
this.string = string;
this.nullString = nullString;
}
@Override
public String transform(Boolean b) {
return (b == null) ? this.nullString : this.transform(b.booleanValue());
}
private String transform(boolean b) {
String defaultStringValue = b ? JptCommonUiMessages.BOOLEAN_TRUE : JptCommonUiMessages.BOOLEAN_FALSE;
return NLS.bind(this.string, defaultStringValue);
}
}
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