| /* |
| * Copyright (c) 2005, 2008 Sven Efftinge 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: |
| * Sven Efftinge - Initial API and implementation |
| * Artem Tikhomirov (Borland) - Migration to OCL expressions |
| */ |
| package org.eclipse.gmf.internal.xpand.ast; |
| |
| import org.eclipse.gmf.internal.xpand.eval.EvaluationListener; |
| import org.eclipse.gmf.internal.xpand.expression.ast.SyntaxElement; |
| import org.eclipse.gmf.internal.xpand.model.ExecutionContext; |
| import org.eclipse.gmf.internal.xpand.model.XpandAnalyzable; |
| import org.eclipse.gmf.internal.xpand.model.XpandEvaluatable; |
| |
| public abstract class Statement extends SyntaxElement implements XpandAnalyzable, XpandEvaluatable { |
| public Statement(final int start, final int end, final int line) { |
| super(start, end, line); |
| } |
| |
| public final void evaluate(final ExecutionContext ctx) { |
| try { |
| notifyEnter(ctx); |
| ctx.getScope().getOutput().enterStatement(this); |
| evaluateInternal(ctx); |
| ctx.getScope().getOutput().exitStatement(null); |
| } finally { |
| notifyLeave(ctx); |
| } |
| } |
| |
| protected abstract void evaluateInternal(ExecutionContext ctx); |
| |
| private void notifyEnter(ExecutionContext ctx) { |
| EvaluationListener l = ctx.getScope().getEvaluationListener(); |
| if (l != null) { |
| l.enter(this, ctx); |
| } |
| } |
| |
| private void notifyLeave(ExecutionContext ctx) { |
| EvaluationListener l = ctx.getScope().getEvaluationListener(); |
| if (l != null) { |
| l.leave(this, ctx); |
| } |
| } |
| } |