/*******************************************************************************
 * 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
 *     Zend Technologies
 *******************************************************************************/
package org2.eclipse.php.internal.core.ast.nodes;


/**
 * base class for all the static access
 */
public abstract class StaticDispatch extends VariableBase {

	private Expression className;

	/**
	 * The structural property of this node type.
	 */
	abstract ChildPropertyDescriptor getClassNameProperty();
	
	public StaticDispatch(int start, int end, AST ast, Expression className) {
		super(start, end, ast);

		if (className == null) {
			throw new IllegalArgumentException();
		}
		setClassName(className);	
	}

	public StaticDispatch(AST ast) {
		super(ast);
	}

	public Expression getClassName() {
		return className;
	}

	/**
	 * Sets the class name expression
	 * 
	 * @param name the class name of this dispatch
	 * @exception IllegalArgumentException if:
	 * <ul>
	 * <li>the node belongs to a different AST</li>
	 * <li>the node already has a parent</li>
	 * <li>a cycle in would be created</li>
	 * </ul>
	 */ 
	public void setClassName(Expression name) {
		if (name == null) {
			throw new IllegalArgumentException();
		}
		// an Assignment may occur inside a Expression - must check cycles
		ASTNode oldChild = this.className;
		preReplaceChild(oldChild, name, getClassNameProperty());
		this.className = name;
		postReplaceChild(oldChild, name, getClassNameProperty());
	}	
	
	ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
		if (property == getClassNameProperty()) {
			if (get) {
				return getClassName();
			} else {
				setClassName((Expression) child);
				return null;
			}
		}
		// allow default implementation to flag the error
		return super.internalGetSetChildProperty(property, get, child);
	}
	
	
	public abstract ASTNode getMember();
}