19f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/* 29f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Licensed to the Apache Software Foundation (ASF) under one 39f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * or more contributor license agreements. See the NOTICE file 49f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * distributed with this work for additional information 59f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * regarding copyright ownership. The ASF licenses this file 69f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to you under the Apache License, Version 2.0 (the "License"); 79f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * you may not use this file except in compliance with the License. 89f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * You may obtain a copy of the License at 99f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Unless required by applicable law or agreed to in writing, software 139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * See the License for the specific language governing permissions and 169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * limitations under the License. 179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/* 199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * $Id: FilterExprIteratorSimple.java 468655 2006-10-28 07:12:06Z minchau $ 209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpackage org.apache.xpath.axes; 229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xml.dtm.Axis; 249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xml.dtm.DTM; 259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xml.utils.PrefixResolver; 269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.Expression; 279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.ExpressionOwner; 289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.VariableStack; 299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPathContext; 309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPathVisitor; 319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.objects.XNodeSet; 329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/** 349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Class to use for one-step iteration that doesn't have a predicate, and 359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * doesn't need to set the context. 369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpublic class FilterExprIteratorSimple extends LocPathIterator 389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson{ 399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson static final long serialVersionUID = -6978977187025375579L; 409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** The contained expression. Should be non-null. 419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @serial */ 429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private Expression m_expr; 439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** The result of executing m_expr. Needs to be deep cloned on clone op. */ 459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson transient private XNodeSet m_exprObj; 469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private boolean m_mustHardReset = false; 489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private boolean m_canDetachNodeset = true; 499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Create a FilterExprIteratorSimple object. 529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public FilterExprIteratorSimple() 559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super(null); 579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Create a FilterExprIteratorSimple object. 619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public FilterExprIteratorSimple(Expression expr) 649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super(null); 669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_expr = expr; 679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Initialize the context values for this expression 719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * after it is cloned. 729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param context The XPath runtime context for this 749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * transformation. 759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void setRoot(int context, Object environment) 779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super.setRoot(context, environment); 799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_exprObj = executeFilterExpr(context, m_execContext, getPrefixResolver(), 809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson getIsTopLevel(), m_stackFrame, m_expr); 819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Execute the expression. Meant for reuse by other FilterExpr iterators 859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * that are not derived from this object. 869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public static XNodeSet executeFilterExpr(int context, XPathContext xctxt, 889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson PrefixResolver prefixResolver, 899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson boolean isTopLevel, 909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int stackFrame, 919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Expression expr ) 929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throws org.apache.xml.utils.WrappedRuntimeException 939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson PrefixResolver savedResolver = xctxt.getNamespaceContext(); 959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XNodeSet result = null; 969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson try 989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson xctxt.pushCurrentNode(context); 1009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson xctxt.setNamespaceContext(prefixResolver); 1019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // The setRoot operation can take place with a reset operation, 1039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // and so we may not be in the context of LocPathIterator#nextNode, 1049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // so we have to set up the variable context, execute the expression, 1059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // and then restore the variable context. 1069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1079f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (isTopLevel) 1089f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1099f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // System.out.println("calling m_expr.execute(getXPathContext())"); 1109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson VariableStack vars = xctxt.getVarStack(); 1119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // These three statements need to be combined into one operation. 1139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int savedStart = vars.getStackFrame(); 1149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson vars.setStackFrame(stackFrame); 1159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson result = (org.apache.xpath.objects.XNodeSet) expr.execute(xctxt); 1179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson result.setShouldCacheNodes(true); 1189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // These two statements need to be combined into one operation. 1209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson vars.setStackFrame(savedStart); 1219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else 1239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson result = (org.apache.xpath.objects.XNodeSet) expr.execute(xctxt); 1249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson catch (javax.xml.transform.TransformerException se) 1279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // TODO: Fix... 1309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throw new org.apache.xml.utils.WrappedRuntimeException(se); 1319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson finally 1339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson xctxt.popCurrentNode(); 1359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson xctxt.setNamespaceContext(savedResolver); 1369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return result; 1389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Returns the next node in the set and advances the position of the 1429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * iterator in the set. After a NodeIterator is created, the first call 1439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to nextNode() returns the first node in the set. 1449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 1459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return The next <code>Node</code> in the set being iterated over, or 1469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * <code>null</code> if there are no more members in that set. 1479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public int nextNode() 1499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if(m_foundLast) 1519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return DTM.NULL; 1529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int next; 1549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (null != m_exprObj) 1569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_lastFetched = next = m_exprObj.nextNode(); 1589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else 1609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_lastFetched = next = DTM.NULL; 1619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // m_lastFetched = next; 1639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (DTM.NULL != next) 1649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_pos++; 1669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return next; 1679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else 1699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_foundLast = true; 1719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return DTM.NULL; 1739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Detaches the walker from the set which it iterated over, releasing 1789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * any computational resources and placing the iterator in the INVALID 1799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * state. 1809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void detach() 1829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if(m_allowDetach) 1849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super.detach(); 1869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_exprObj.detach(); 1879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_exprObj = null; 1889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * This function is used to fixup variables from QNames to stack frame 1939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * indexes at stylesheet build time. 1949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param vars List of QNames that correspond to variables. This list 1959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * should be searched backwards for the first qualified name that 1969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * corresponds to the variable reference qname. The position of the 1979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * QName in the vector from the start of the vector will be its position 1989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * in the stack frame (but variables above the globalsTop value will need 1999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to be offset to the current stack frame). 2009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void fixupVariables(java.util.Vector vars, int globalsSize) 2029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super.fixupVariables(vars, globalsSize); 2049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_expr.fixupVariables(vars, globalsSize); 2059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2079f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 2089f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Get the inner contained expression of this filter. 2099f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public Expression getInnerExpression() 2119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return m_expr; 2139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 2169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Set the inner contained expression of this filter. 2179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void setInnerExpression(Expression expr) 2199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson expr.exprSetParent(this); 2219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_expr = expr; 2229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 2259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Get the analysis bits for this walker, as defined in the WalkerFactory. 2269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return One of WalkerFactory#BIT_DESCENDANT, etc. 2279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public int getAnalysisBits() 2299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (null != m_expr && m_expr instanceof PathComponent) 2319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return ((PathComponent) m_expr).getAnalysisBits(); 2339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return WalkerFactory.BIT_FILTER; 2359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 2389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Returns true if all the nodes in the iteration well be returned in document 2399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * order. 2409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Warning: This can only be called after setRoot has been called! 2419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 2429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return true as a default. 2439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public boolean isDocOrdered() 2459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return m_exprObj.isDocOrdered(); 2479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson class filterExprOwner implements ExpressionOwner 2509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 2529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see ExpressionOwner#getExpression() 2539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public Expression getExpression() 2559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return m_expr; 2579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 2609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see ExpressionOwner#setExpression(Expression) 2619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void setExpression(Expression exp) 2639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson exp.exprSetParent(FilterExprIteratorSimple.this); 2659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_expr = exp; 2669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 2719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * This will traverse the heararchy, calling the visitor for 2729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * each member. If the called visitor method returns 2739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * false, the subtree should not be called. 2749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 2759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param visitor The visitor whose appropriate method will be called. 2769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void callPredicateVisitors(XPathVisitor visitor) 2789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_expr.callVisitors(new filterExprOwner(), visitor); 2809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super.callPredicateVisitors(visitor); 2829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 2859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see Expression#deepEquals(Expression) 2869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 2879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public boolean deepEquals(Expression expr) 2889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 2899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (!super.deepEquals(expr)) 2909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return false; 2919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson FilterExprIteratorSimple fet = (FilterExprIteratorSimple) expr; 2939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (!m_expr.deepEquals(fet.m_expr)) 2949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return false; 2959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return true; 2979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 2989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 2999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 3009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Returns the axis being iterated, if it is known. 3019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 3029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return Axis.CHILD, etc., or -1 if the axis is not known or is of multiple 3039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * types. 3049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 3059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public int getAxis() 3069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 3079f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if(null != m_exprObj) 3089f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return m_exprObj.getAxis(); 3099f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else 3109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return Axis.FILTEREDLIST; 3119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 3129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 3139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 3149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson} 3159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 316