1 files changed, 44 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/PatchQuery.java b/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/PatchQuery.java
new file mode 100644
index 000000000..d066db376
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/PatchQuery.java
@@ -0,0 +1,44 @@
+/*******************************************************************************
+ *  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.metadata.query;
+
+import org.eclipse.equinox.internal.p2.metadata.query.IUPropertyQuery;
+import org.eclipse.equinox.p2.metadata.IInstallableUnit;
+import org.eclipse.equinox.p2.query.MatchQuery;
+
+/**
+ * A query matching every {@link IInstallableUnit} that is a patch. 
+ * @since 2.0
+ */
+public final class PatchQuery extends MatchQuery<IInstallableUnit> {
+	private static final String PROP_TYPE_PATCH = "org.eclipse.equinox.p2.type.patch"; //$NON-NLS-1$
+	private IUPropertyQuery query;
+
+	public PatchQuery() {
+		query = new IUPropertyQuery(PROP_TYPE_PATCH, Boolean.TRUE.toString());
+	}
+
+	public boolean isMatch(IInstallableUnit candidate) {
+		return query.isMatch(candidate);
+	}
+
+	/**
+	 * Test if the {@link IInstallableUnit} is a patch. 
+	 * @param iu the element being tested.
+	 * @return <tt>true</tt> if the parameter is a patch.
+	 */
+	public static boolean isPatch(IInstallableUnit iu) {
+		String value = iu.getProperty(PROP_TYPE_PATCH);
+		if (value != null && (value.equals(Boolean.TRUE.toString())))
+			return true;
+		return false;
+	}
+}