Bug 136740 Error exporting data from a grouped report.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ExprManagerUtil.java
/*******************************************************************************
 * Copyright (c) 2004, 2005 Actuate Corporation.
 * 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:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.data.engine.impl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import org.eclipse.birt.core.exception.BirtException;
import org.eclipse.birt.data.engine.api.IBaseExpression;
import org.eclipse.birt.data.engine.api.IConditionalExpression;
import org.eclipse.birt.data.engine.api.IScriptExpression;
import org.eclipse.birt.data.engine.core.DataException;
import org.eclipse.birt.data.engine.expression.ExpressionCompilerUtil;
import org.eclipse.birt.data.engine.expression.ExpressionParserUtil;
import org.eclipse.birt.data.engine.i18n.ResourceConstants;
/**
 * This is a utility class which is used to validate the colum bindings defined 
 * in ExprManager instance.
 */
public class ExprManagerUtil