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package com.sun.org.apache.xpath.internal.functions;

import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xpath.internal.XPathContext;
import com.sun.org.apache.xpath.internal.objects.XBoolean;
import com.sun.org.apache.xpath.internal.objects.XObject;

Execute the Lang() function.
@xsl.usageadvanced
/** * Execute the Lang() function. * @xsl.usage advanced */
public class FuncLang extends FunctionOneArg { static final long serialVersionUID = -7868705139354872185L;
Execute the function. The function must return a valid object.
Params:
  • xctxt – The current execution context.
Throws:
Returns:A valid XObject.
/** * Execute the function. The function must return * a valid object. * @param xctxt The current execution context. * @return A valid XObject. * * @throws javax.xml.transform.TransformerException */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException { String lang = m_arg0.execute(xctxt).str(); int parent = xctxt.getCurrentNode(); boolean isLang = false; DTM dtm = xctxt.getDTM(parent); while (DTM.NULL != parent) { if (DTM.ELEMENT_NODE == dtm.getNodeType(parent)) { int langAttr = dtm.getAttributeNode(parent, "http://www.w3.org/XML/1998/namespace", "lang"); if (DTM.NULL != langAttr) { String langVal = dtm.getNodeValue(langAttr); // %OPT% if (langVal.toLowerCase().startsWith(lang.toLowerCase())) { int valLen = lang.length(); if ((langVal.length() == valLen) || (langVal.charAt(valLen) == '-')) { isLang = true; } } break; } } parent = dtm.getParent(parent); } return isLang ? XBoolean.S_TRUE : XBoolean.S_FALSE; } }