1 files changed, 106 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/InstallableUnitQuery.java b/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/InstallableUnitQuery.java
new file mode 100644
index 000000000..ac2110b03
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/InstallableUnitQuery.java
@@ -0,0 +1,106 @@
+/*******************************************************************************
+ *  Copyright (c) 2007, 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.metadata.query;
+
+import org.eclipse.equinox.p2.metadata.Version;
+import org.eclipse.equinox.p2.metadata.VersionRange;
+
+import org.eclipse.equinox.p2.metadata.IInstallableUnit;
+import org.eclipse.equinox.p2.metadata.IVersionedId;
+import org.eclipse.equinox.p2.query.MatchQuery;
+
+/**
+ * A query that matches on the id and version of an {@link IInstallableUnit}.
+ * @since 2.0
+ */
+public class InstallableUnitQuery extends MatchQuery<IInstallableUnit> {
+	/**
+	 * A convenience query that will match any {@link IInstallableUnit}
+	 * it encounters.
+	 */
+	public static final InstallableUnitQuery ANY = new InstallableUnitQuery((String) null);
+
+	private String id;
+	private final VersionRange range;
+
+	/**
+	 * Creates a query that will match any {@link IInstallableUnit} with the given
+	 * id, regardless of version.
+	 * 
+	 * @param id The installable unit id to match, or <code>null</code> to match any id
+	 */
+	public InstallableUnitQuery(String id) {
+		this.id = id;
+		this.range = null;
+	}
+
+	/**
+	 * Creates a query that will match any {@link IInstallableUnit} with the given
+	 * id, and whose version falls in the provided range.
+	 * 
+	 * @param id The installable unit id to match, or <code>null</code> to match any id
+	 * @param range The version range to match
+	 */
+	public InstallableUnitQuery(String id, VersionRange range) {
+		this.id = id;
+		this.range = range;
+	}
+
+	/**
+	 * Creates a query that will match any {@link IInstallableUnit} with the given
+	 * id and version.
+	 * 
+	 * @param id The installable unit id to match, or <code>null</code> to match any id
+	 * @param version The precise version that a matching unit must have
+	 */
+	public InstallableUnitQuery(String id, Version version) {
+		this.id = id;
+		this.range = (version == null || Version.emptyVersion.equals(version)) ? null : new VersionRange(version, true, version, true);
+	}
+
+	/**
+	 * Creates a query that will match any {@link IInstallableUnit} with the given
+	 * id and version.
+	 * 
+	 * @param versionedId The precise id/version combination that a matching unit must have
+	 */
+	public InstallableUnitQuery(IVersionedId versionedId) {
+		this(versionedId.getId(), versionedId.getVersion());
+	}
+
+	/**
+	 * Returns the id that this query will match against.
+	 * @return The installable unit it
+	 */
+	public String getId() {
+		return id;
+	}
+
+	/**
+	 * Returns the version range that this query will match against.
+	 * @return The installable unit version range.
+	 */
+	public VersionRange getRange() {
+		return range;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.equinox.p2.query2.Query#isMatch(java.lang.Object)
+	 */
+	public boolean isMatch(IInstallableUnit candidate) {
+		if (id != null && !id.equals(candidate.getId()))
+			return false;
+		if (range != null && !range.isIncluded(candidate.getVersion()))
+			return false;
+		return true;
+	}
+
+}