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The source code/* * Copyright 1999-2004 The Apache Software Foundation * * Licensed 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.commons.jxpath.ri.compiler; import org.apache.commons.jxpath.ri.EvalContext; /** * A compile tree element containing a constant number or string. * * @author Dmitri Plotnikov * @version $Revision: 1.8 $ $Date: 2004/02/29 14:17:39 $ */ public class Constant extends Expression { private Object value; public Constant(Number number) { this.value = number; } public Constant(String string) { this.value = string; } public Object compute(EvalContext context) { return value; } /** * Returns the value of the constant. */ public Object computeValue(EvalContext context) { return value; } /** * Returns false */ public boolean isContextDependent() { return false; } /** * Returns false */ public boolean computeContextDependent() { return false; } public String toString() { if (value instanceof Number) { double doubleValue = ((Number) value).doubleValue(); long longValue = ((Number) value).longValue(); if (doubleValue == longValue) { return String.valueOf(longValue); } else { return String.valueOf(doubleValue); } } else { return "'" + value + "'"; } } } |
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