/* Generated By:JJTree: Do not edit this line. Node.java */

/*

* Licensed to the Apache Software Foundation (ASF) under one or more

* contributor license agreements. See the NOTICE file distributed with

* this work for additional information regarding copyright ownership.

* The ASF licenses this file to You under the Apache License, Version 2.0

* (the "License"); you may not use this file except in compliance with

* the License. You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package org.apache.el.parser;

import javax.el.ELException;

import javax.el.MethodInfo;

import javax.el.ValueReference;

import org.apache.el.lang.EvaluationContext;

/* All AST nodes must implement this interface. It provides basic

machinery for constructing the parent and child relationships

between nodes. */

/**

* @author Jacob Hookom [jacob@hookom.net]

* $Id: Node.java 898969 2010-01-13 22:10:49Z markt $

*/

public interface Node {

/** This method is called after the node has been made the current

node. It indicates that child nodes can now be added to it. */

public void jjtOpen();

/** This method is called after all the child nodes have been

added. */

public void jjtClose();

/** This pair of methods are used to inform the node of its

parent. */

public void jjtSetParent(Node n);

public Node jjtGetParent();

/** This method tells the node to add its argument to the node's

list of children. */

public void jjtAddChild(Node n, int i);

/** This method returns a child node. The children are numbered

from zero, left to right. */

public Node jjtGetChild(int i);

/** Return the number of children the node has. */

public int jjtGetNumChildren();

public String getImage();

public Object getValue(EvaluationContext ctx) throws ELException;

public void setValue(EvaluationContext ctx, Object value) throws ELException;

public Class<?> getType(EvaluationContext ctx) throws ELException;

public boolean isReadOnly(EvaluationContext ctx) throws ELException;

public void accept(NodeVisitor visitor) throws Exception;

public MethodInfo getMethodInfo(EvaluationContext ctx, Class<?>[] paramTypes)

throws ELException;

public Object invoke(EvaluationContext ctx, Class<?>[] paramTypes,

Object[] paramValues) throws ELException;

/**

* @since EL 2.2

*/

public ValueReference getValueReference(EvaluationContext ctx);

/**

* @since EL 2.2

*/

public boolean isParametersProvided();

}