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/*******************************************************************************
* Copyright (c) 2009, 2010 THALES GLOBAL SERVICES.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.ui.tools.internal.dialogs;
import org.eclipse.gmf.runtime.common.core.util.StringMatcher;
import org.eclipse.sirius.diagram.DDiagramElement;
import org.eclipse.sirius.diagram.ui.business.api.provider.AbstractDDiagramElementLabelItemProvider;
import com.google.common.base.Predicate;
/**
* <p>
* A {@link StringMatcher} used to detect elements that match a regular
* expression.
* </p>
*
* This Matcher creates a MatchPredicate, that can be used to determine if a
* given Object matches a regular expression.
*
* @author <a href="mailto:alex.lagarde@obeo.fr">Alex Lagarde</a>
*/
public class DiagramElementsSelectionDialogPatternMatcher {
private Predicate<Object> matchPredicate;
private StringMatcher stringMatcher;
/**
* Creates a new PatternMatcher.
*
*
* @param expreg
* the regular expression (for example '?a?' or 'abc' or '*c') ;
* <code>null</code> or empty regular expression will be replaced
* by '*'
*
*/
public DiagramElementsSelectionDialogPatternMatcher(String expreg) {
String computedExpreg = expreg;
if (expreg == null) {
computedExpreg = ""; //$NON-NLS-1$
}
// If the regular expression ends with a space, we have to use the exact
// value of the given expreg
if (computedExpreg.endsWith(" ")) { //$NON-NLS-1$
computedExpreg = computedExpreg.substring(0, computedExpreg.lastIndexOf(' '));
} else {
// Otherwise, we add a star to make 'XYZ' recognized by the 'X'
// expreg (as in quick outline for example)
computedExpreg = computedExpreg + "*"; //$NON-NLS-1$
}
this.stringMatcher = new StringMatcher(computedExpreg, true, false);
}
/**
* Creates a {@link Predicate} that can be applied on any Object. This
* predicates will return true if the tested element is a
* {@link DDiagramElement} and that its name is matching the regular
* expression used to construct this Matcher.
*
* @return a {@link Predicate} that can be applied on any Object to
* determine if whether it's matching the regular expression used to
* construct this Matcher
*/
public Predicate<Object> getMatchPredicate() {
if (matchPredicate == null) {
matchPredicate = new Predicate<Object>() {
public boolean apply(Object input) {
String elementName = null;
if (input instanceof DDiagramElement) {
DDiagramElement element = (DDiagramElement) input;
elementName = element.getName();
} else if (input instanceof AbstractDDiagramElementLabelItemProvider) {
AbstractDDiagramElementLabelItemProvider element = (AbstractDDiagramElementLabelItemProvider) input;
elementName = element.getText(element.getTarget());
}
return elementName != null && stringMatcher.match(elementName);
}
};
}
return matchPredicate;
}
}
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