content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2001-2004 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: AbsolutePathPattern.java,v 1.2.4.1 2005/09/01 09:17:09 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler;
  
  import jaxp.sun.org.apache.bcel.internal.generic.BranchHandle;
  import jaxp.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  import jaxp.sun.org.apache.bcel.internal.generic.GOTO_W;
  import jaxp.sun.org.apache.bcel.internal.generic.IF_ICMPEQ;
  import jaxp.sun.org.apache.bcel.internal.generic.ILOAD;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
  import jaxp.sun.org.apache.bcel.internal.generic.ISTORE;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionHandle;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionList;
  import jaxp.sun.org.apache.bcel.internal.generic.LocalVariableGen;
  import jaxp.sun.org.apache.bcel.internal.generic.PUSH;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
  import jaxp.sun.org.apache.xml.internal.dtm.DTM;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   */
  final class AbsolutePathPattern extends LocationPathPattern {
      private final RelativePathPattern _left; // may be null
  
      public AbsolutePathPattern(RelativePathPattern left) {
          _left = left;
          if (left != null) {
              left.setParent(this);
          }
      }
  
      public void setParser(Parser parser) {
          super.setParser(parser);
          if (_left != null)
              _left.setParser(parser);
      }
  
      public Type typeCheck(SymbolTable stable) throws TypeCheckError {
          return _left == null ? Type.Root : _left.typeCheck(stable);
      }
  
      public boolean isWildcard() {
          return false;
      }
  
      public StepPattern getKernelPattern() {
          return _left != null ? _left.getKernelPattern() : null;
      }
  
      public void reduceKernelPattern() {
          _left.reduceKernelPattern();
      }
  
      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
          final ConstantPoolGen cpg = classGen.getConstantPool();
          final InstructionList il = methodGen.getInstructionList();
  
          if (_left != null) {
              if (_left instanceof StepPattern) {
                  final LocalVariableGen local =
                      // absolute path pattern temporary
                      methodGen.addLocalVariable2("apptmp",
                                                  Util.getJCRefType(NODE_SIG),
                                                  null);
                  il.append(DUP);
                  local.setStart(il.append(new ISTORE(local.getIndex())));
                  _left.translate(classGen, methodGen);
                  il.append(methodGen.loadDOM());
                  local.setEnd(il.append(new ILOAD(local.getIndex())));
                  methodGen.removeLocalVariable(local);
              }
              else {
                  _left.translate(classGen, methodGen);
              }
          }
  
          final int getParent = cpg.addInterfaceMethodref(DOM_INTF,
                                                          GET_PARENT,
                                                          GET_PARENT_SIG);
          final int getType = cpg.addInterfaceMethodref(DOM_INTF,
                                                        "getExpandedTypeID",
                                                        "(I)I");
  
          InstructionHandle begin = il.append(methodGen.loadDOM());
          il.append(SWAP);
          il.append(new INVOKEINTERFACE(getParent, 2));
          if (_left instanceof AncestorPattern) {
              il.append(methodGen.loadDOM());
              il.append(SWAP);
          }
          il.append(new INVOKEINTERFACE(getType, 2));
          il.append(new PUSH(cpg, DTM.DOCUMENT_NODE));
  
          final BranchHandle skip = il.append(new IF_ICMPEQ(null));
          _falseList.add(il.append(new GOTO_W(null)));
          skip.setTarget(il.append(NOP));
  
          if (_left != null) {
              _left.backPatchTrueList(begin);
  
              /*
               * If _left is an ancestor pattern, backpatch this pattern's false
               * list to the loop that searches for more ancestors.
               */
              if (_left instanceof AncestorPattern) {
                  final AncestorPattern ancestor = (AncestorPattern) _left;
                  _falseList.backPatch(ancestor.getLoopHandle());         // clears list
              }
              _falseList.append(_left._falseList);
          }
      }
  
      public String toString() {
          return "absolutePathPattern(" + (_left != null ? _left.toString() : ")");
      }
  }
  