| /******************************************************************************* |
| * 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.expression; |
| |
| import java.util.Iterator; |
| import org.eclipse.equinox.internal.p2.metadata.expression.*; |
| import org.eclipse.equinox.p2.metadata.expression.IEvaluationContext; |
| import org.eclipse.equinox.p2.ql.IQLExpression; |
| |
| /** |
| * An expression representing a variable stack in the current thread. |
| */ |
| class Assignment extends Binary implements IQLConstants, IQLExpression { |
| Assignment(Variable variable, Expression expression) { |
| super(variable, expression); |
| } |
| |
| public final Object evaluate(IEvaluationContext context) { |
| Object value = rhs.evaluate(context); |
| context.setValue(lhs, value); |
| return value; |
| } |
| |
| public int getExpressionType() { |
| return TYPE_ASSIGNMENT; |
| } |
| |
| public int getPriority() { |
| return IExpressionConstants.PRIORITY_ASSIGNMENT; |
| } |
| |
| public String getOperator() { |
| return OPERATOR_ASSIGN; |
| } |
| |
| public Iterator<?> evaluateAsIterator(IEvaluationContext context) { |
| Iterator<?> value = rhs.evaluateAsIterator(context); |
| context.setValue(lhs, value); |
| return value; |
| } |
| } |