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87 lines
2.3 KiB
87 lines
2.3 KiB
/*
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* Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*/
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/*
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* Copyright 1999-2004 The Apache Software Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* $Id: ExsltBase.java,v 1.1.2.1 2005/08/01 02:08:51 jeffsuttor Exp $
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*/
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package com.sun.org.apache.xalan.internal.lib;
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import com.sun.org.apache.xml.internal.dtm.ref.DTMNodeProxy;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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/**
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* The base class for some EXSLT extension classes.
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* It contains common utility methods to be used by the sub-classes.
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*/
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public abstract class ExsltBase
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{
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/**
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* Return the string value of a Node
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*
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* @param n The Node.
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* @return The string value of the Node
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*/
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protected static String toString(Node n)
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{
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if (n instanceof DTMNodeProxy)
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return ((DTMNodeProxy)n).getStringValue();
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else
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{
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String value = n.getNodeValue();
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if (value == null)
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{
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NodeList nodelist = n.getChildNodes();
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StringBuffer buf = new StringBuffer();
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for (int i = 0; i < nodelist.getLength(); i++)
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{
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Node childNode = nodelist.item(i);
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buf.append(toString(childNode));
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}
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return buf.toString();
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}
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else
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return value;
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}
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}
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/**
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* Convert the string value of a Node to a number.
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* Return NaN if the string is not a valid number.
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*
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* @param n The Node.
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* @return The number value of the Node
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*/
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protected static double toNumber(Node n)
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{
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double d = 0.0;
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String str = toString(n);
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try
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{
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d = Double.valueOf(str).doubleValue();
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}
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catch (NumberFormatException e)
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{
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d= Double.NaN;
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}
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return d;
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}
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}
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