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

import com.sun.org.apache.xalan.internal.res.XSLMessages;
import com.sun.org.apache.xpath.internal.XPathContext;
import com.sun.org.apache.xpath.internal.objects.XObject;
import com.sun.org.apache.xpath.internal.objects.XString;

Execute the Concat() function.
@xsl.usageadvanced
/** * Execute the Concat() function. * @xsl.usage advanced */
public class FuncConcat extends FunctionMultiArgs { static final long serialVersionUID = 1737228885202314413L;
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 { StringBuffer sb = new StringBuffer(); // Compiler says we must have at least two arguments. sb.append(m_arg0.execute(xctxt).str()); sb.append(m_arg1.execute(xctxt).str()); if (null != m_arg2) sb.append(m_arg2.execute(xctxt).str()); if (null != m_args) { for (int i = 0; i < m_args.length; i++) { sb.append(m_args[i].execute(xctxt).str()); } } return new XString(sb.toString()); }
Check that the number of arguments passed to this function is correct.
Params:
  • argNum – The number of arguments that is being passed to the function.
Throws:
/** * Check that the number of arguments passed to this function is correct. * * * @param argNum The number of arguments that is being passed to the function. * * @throws WrongNumberArgsException */
public void checkNumberArgs(int argNum) throws WrongNumberArgsException { if (argNum < 2) reportWrongNumberArgs(); }
Constructs and throws a WrongNumberArgException with the appropriate message for this function object.
Throws:
  • WrongNumberArgsException –
/** * Constructs and throws a WrongNumberArgException with the appropriate * message for this function object. * * @throws WrongNumberArgsException */
protected void reportWrongNumberArgs() throws WrongNumberArgsException { throw new WrongNumberArgsException(XSLMessages.createXPATHMessage("gtone", null)); } }