- /*
- * 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: SelfIteratorNoPredicate.java,v 1.12 2004/02/17 04:32:08 minchau Exp $
- */
- package com.sun.org.apache.xpath.internal.axes;
-
- import com.sun.org.apache.xml.internal.dtm.DTM;
- import com.sun.org.apache.xpath.internal.XPathContext;
- import com.sun.org.apache.xpath.internal.compiler.Compiler;
-
- /**
- * This class implements an optimized iterator for
- * "." patterns, that is, the self axes without any predicates.
- * @see com.sun.org.apache.xpath.internal.axes.LocPathIterator
- * @xsl.usage advanced
- */
- public class SelfIteratorNoPredicate extends LocPathIterator
- {
-
- /**
- * Create a SelfIteratorNoPredicate object.
- *
- * @param compiler A reference to the Compiler that contains the op map.
- * @param opPos The position within the op map, which contains the
- * location path expression for this itterator.
- * @param analysis Analysis bits.
- *
- * @throws javax.xml.transform.TransformerException
- */
- SelfIteratorNoPredicate(Compiler compiler, int opPos, int analysis)
- throws javax.xml.transform.TransformerException
- {
- super(compiler, opPos, analysis, false);
- }
-
- /**
- * Create a SelfIteratorNoPredicate object.
- *
- * @param compiler A reference to the Compiler that contains the op map.
- * @param opPos The position within the op map, which contains the
- * location path expression for this itterator.
- * @param analysis Analysis bits.
- *
- * @throws javax.xml.transform.TransformerException
- */
- public SelfIteratorNoPredicate()
- throws javax.xml.transform.TransformerException
- {
- super(null);
- }
-
-
- /**
- * Returns the next node in the set and advances the position of the
- * iterator in the set. After a NodeIterator is created, the first call
- * to nextNode() returns the first node in the set.
- *
- * @return The next <code>Node</code> in the set being iterated over, or
- * <code>null</code> if there are no more members in that set.
- */
- public int nextNode()
- {
- if (m_foundLast)
- return DTM.NULL;
-
- int next;
- DTM dtm = m_cdtm;
-
- m_lastFetched = next = (DTM.NULL == m_lastFetched)
- ? m_context
- : DTM.NULL;
-
- // m_lastFetched = next;
- if (DTM.NULL != next)
- {
- m_pos++;
-
- return next;
- }
- else
- {
- m_foundLast = true;
-
- return DTM.NULL;
- }
- }
-
- /**
- * Return the first node out of the nodeset, if this expression is
- * a nodeset expression. This is the default implementation for
- * nodesets. Derived classes should try and override this and return a
- * value without having to do a clone operation.
- * @param xctxt The XPath runtime context.
- * @return the first node out of the nodeset, or DTM.NULL.
- */
- public int asNode(XPathContext xctxt)
- throws javax.xml.transform.TransformerException
- {
- return xctxt.getCurrentNode();
- }
-
- /**
- * Get the index of the last node that can be itterated to.
- * This probably will need to be overridded by derived classes.
- *
- * @param xctxt XPath runtime context.
- *
- * @return the index of the last node that can be itterated to.
- */
- public int getLastPos(XPathContext xctxt)
- {
- return 1;
- }
-
-
- }