package org.apache.velocity.runtime.parser.node;
/*
* 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.
*/
import java.math.BigInteger;
import org.apache.velocity.context.InternalContextAdapter;
import org.apache.velocity.exception.TemplateInitException;
import org.apache.velocity.runtime.parser.Parser;
/**
* Handles integer numbers. The value will be either an Integer, a Long, or a BigInteger.
*
* @author <a href="mailto:[email protected]">Will Glass-Husain</a>
* @since 1.5
*/
public class ASTIntegerLiteral extends SimpleNode
{
// This may be of type Integer, Long or BigInteger
private Number value = null;
/**
* @param id
*/
public ASTIntegerLiteral(int id)
{
super(id);
}
/**
* @param p
* @param id
*/
public ASTIntegerLiteral(Parser p, int id)
{
super(p, id);
}
/**
* @see org.apache.velocity.runtime.parser.node.SimpleNode#jjtAccept(org.apache.velocity.runtime.parser.node.ParserVisitor, java.lang.Object)
*/
public Object jjtAccept(ParserVisitor visitor, Object data)
{
return visitor.visit(this, data);
}
/**
* @see org.apache.velocity.runtime.parser.node.SimpleNode#init(org.apache.velocity.context.InternalContextAdapter, java.lang.Object)
*/
public Object init( InternalContextAdapter context, Object data)
throws TemplateInitException
{
/*
* init the tree correctly
*/
super.init( context, data );
/**
* Determine the size of the item and make it an Integer, Long, or BigInteger as appropriate.
*/
String str = getFirstToken().image;
try
{
value = new Integer( str );
}
catch ( NumberFormatException E1 )
{
try
{
value = new Long( str );
}
catch ( NumberFormatException E2 )
{
// if there's still an Exception it will propogate out
value = new BigInteger( str );
}
}
return data;
}
/**
* @see org.apache.velocity.runtime.parser.node.SimpleNode#value(org.apache.velocity.context.InternalContextAdapter)
*/
public Object value( InternalContextAdapter context)
{
return value;
}
}
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