- /*
- * 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.
- */
- /*
- * $Id: FuncLast.java,v 1.15 2004/02/17 04:34:01 minchau Exp $
- */
- package com.sun.org.apache.xpath.internal.functions;
-
- import com.sun.org.apache.xml.internal.dtm.DTMIterator;
- import com.sun.org.apache.xpath.internal.XPathContext;
- import com.sun.org.apache.xpath.internal.axes.SubContextList;
- import com.sun.org.apache.xpath.internal.compiler.Compiler;
- import com.sun.org.apache.xpath.internal.objects.XNumber;
- import com.sun.org.apache.xpath.internal.objects.XObject;
-
-
- /**
- * Execute the Last() function.
- * @xsl.usage advanced
- */
- public class FuncLast extends Function
- {
-
- private boolean m_isTopLevel;
-
- /**
- * Figure out if we're executing a toplevel expression.
- * If so, we can't be inside of a predicate.
- */
- public void postCompileStep(Compiler compiler)
- {
- m_isTopLevel = compiler.getLocationPathDepth() == -1;
- }
-
- /**
- * Get the position in the current context node list.
- *
- * @param xctxt non-null reference to XPath runtime context.
- *
- * @return The number of nodes in the list.
- *
- * @throws javax.xml.transform.TransformerException
- */
- public int getCountOfContextNodeList(XPathContext xctxt)
- throws javax.xml.transform.TransformerException
- {
-
- // assert(null != m_contextNodeList, "m_contextNodeList must be non-null");
- // If we're in a predicate, then this will return non-null.
- SubContextList iter = m_isTopLevel ? null : xctxt.getSubContextList();
-
- // System.out.println("iter: "+iter);
- if (null != iter)
- return iter.getLastPos(xctxt);
-
- DTMIterator cnl = xctxt.getContextNodeList();
- int count;
- if(null != cnl)
- {
- count = cnl.getLength();
- // System.out.println("count: "+count);
- }
- else
- count = 0;
- return count;
- }
-
- /**
- * 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
- {
- XNumber xnum = new XNumber((double) getCountOfContextNodeList(xctxt));
- // System.out.println("last: "+xnum.num());
- return xnum;
- }
-
- /**
- * No arguments to process, so this does nothing.
- */
- public void fixupVariables(java.util.Vector vars, int globalsSize)
- {
- // no-op
- }
-
- }