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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 org.apache.velocity.context.InternalContextAdapter;
import org.apache.velocity.exception.TemplateInitException;
import org.apache.velocity.runtime.RuntimeConstants;
import org.apache.velocity.runtime.parser.Parser;
import java.math.BigDecimal;
/**
* Handles floating point numbers. The value will be either a Double
* or a BigDecimal.
*
* @author <a href="mailto:wglass@forio.com">Will Glass-Husain</a>
* @since 1.5
*/
public class ASTFloatingPointLiteral extends SimpleNode
{
// This may be of type Double or BigDecimal
private Number value = null;
/**
* @param id
*/
public ASTFloatingPointLiteral(int id)
{
super(id);
}
/**
* @param p
* @param id
*/
public ASTFloatingPointLiteral(Parser p, int id)
{
super(p, id);
}
/**
* @see org.apache.velocity.runtime.parser.node.SimpleNode#jjtAccept(org.apache.velocity.runtime.parser.node.StandardParserVisitor, java.lang.Object)
*/
@Override
public Object jjtAccept(StandardParserVisitor visitor, Object data)
{
return visitor.visit(this, data);
}
/**
* Initialization method - doesn't do much but do the object
* creation. We only need to do it once.
* @param context
* @param data
* @return The data object.
* @throws TemplateInitException
*/
@Override
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 a Double or BigDecimal as appropriate.
*/
String str = getFirstToken().image;
try
{
value = Double.valueOf( str );
} catch ( NumberFormatException E1 )
{
// if there's still an Exception it will propqgate out
value = new BigDecimal( str );
}
cleanupParserAndTokens();
return data;
}
/**
* @see org.apache.velocity.runtime.parser.node.SimpleNode#value(org.apache.velocity.context.InternalContextAdapter)
*/
@Override
public Object value(InternalContextAdapter context)
{
return value;
}
/**
* @see org.apache.velocity.runtime.parser.node.SimpleNode#evaluate(org.apache.velocity.context.InternalContextAdapter)
*/
@Override
public boolean evaluate(InternalContextAdapter context)
{
return !rsvc.getBoolean(RuntimeConstants.CHECK_EMPTY_OBJECTS, true) || !MathUtils.isZero(value);
}
}
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