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/*******************************************************************************
* Copyright (c) 2009 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.equinox.p2.repository.artifact;
import org.eclipse.equinox.p2.metadata.IArtifactKey;
import org.eclipse.equinox.p2.metadata.VersionRange;
import org.eclipse.equinox.p2.metadata.expression.*;
import org.eclipse.equinox.p2.metadata.query.ExpressionQuery;
/**
* An IArtifactQuery returning matching IArtifactKey objects.
* @since 2.0
*/
public class ArtifactKeyQuery extends ExpressionQuery<IArtifactKey> {
private static IMatchExpression<IArtifactKey> MATCH_ALL_KEYS = ExpressionUtil.getFactory().matchExpression(ExpressionUtil.TRUE_EXPRESSION);
private static final IExpression matchKey = ExpressionUtil.parse("this == $0"); //$NON-NLS-1$
private static final IExpression matchID = ExpressionUtil.parse("id == $0"); //$NON-NLS-1$
private static final IExpression matchIDClassifierRange = ExpressionUtil.parse("id == $0 && version ~= $2 && (null == $1 || classifier == $1)"); //$NON-NLS-1$
private static IMatchExpression<IArtifactKey> createMatchExpression(IArtifactKey key) {
return key == null ? MATCH_ALL_KEYS : ExpressionUtil.getFactory().<IArtifactKey> matchExpression(matchKey, key);
}
private static IMatchExpression<IArtifactKey> createMatchExpression(String classifier, String id, VersionRange range) {
if (range == null) {
if (classifier == null)
return id == null ? MATCH_ALL_KEYS : ExpressionUtil.getFactory().<IArtifactKey> matchExpression(matchID, id);
range = VersionRange.emptyRange;
}
return ExpressionUtil.getFactory().<IArtifactKey> matchExpression(matchIDClassifierRange, id, classifier, range);
}
public static final ArtifactKeyQuery ALL_KEYS = new ArtifactKeyQuery();
/**
* Pass the id and/or version range to match IArtifactKeys against.
* Passing null results in matching any id/version
* @param classifier The artifact key classifier, or <code>null</code>
* @param id The artifact key id, or <code>null</code>
* @param range A version range, or <code>null</code>
*/
public ArtifactKeyQuery(String classifier, String id, VersionRange range) {
super(IArtifactKey.class, createMatchExpression(classifier, id, range));
}
public ArtifactKeyQuery() {
super(IArtifactKey.class, MATCH_ALL_KEYS);
}
public ArtifactKeyQuery(IArtifactKey key) {
super(IArtifactKey.class, createMatchExpression(key));
}
}
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