1 files changed, 47 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.p2.ql/src/org/eclipse/equinox/internal/p2/ql/ItemExpression.java b/bundles/org.eclipse.equinox.p2.ql/src/org/eclipse/equinox/internal/p2/ql/ItemExpression.java
new file mode 100644
index 000000000..3df5dc1a8
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.ql/src/org/eclipse/equinox/internal/p2/ql/ItemExpression.java
@@ -0,0 +1,47 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Cloudsmith Inc. 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:
+ *     Cloudsmith Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.equinox.internal.p2.ql;
+
+/**
+ * The item expression is the top expression in item queries. It introduces the
+ * variable 'item' and initializes it with the item to match.
+ */
+public final class ItemExpression extends Binary {
+
+	public ItemExpression(Variable itemVariable, Expression expression) {
+		super(itemVariable, expression);
+	}
+
+	public Object evaluate(ExpressionContext context, VariableScope scope) {
+		return rhs.evaluate(context, scope);
+	}
+
+	public boolean isMatch(ExpressionContext context, VariableScope scope, Object value) {
+		scope.setItem(value);
+		return rhs.evaluate(context, scope) == Boolean.TRUE;
+	}
+
+	public void toString(StringBuffer bld) {
+		rhs.toString(bld);
+	}
+
+	protected int getPriority() {
+		return rhs.getPriority();
+	}
+
+	Object evaluate(Object lval, Object rval) {
+		throw new UnsupportedOperationException();
+	}
+
+	String getOperator() {
+		throw new UnsupportedOperationException();
+	}
+}