| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2001, Sun |
| * Microsystems., http://www.sun.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import de.fub.bytecode.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| final class AncestorPattern extends RelativePathPattern { |
| private final Pattern _left; // may be null |
| private final RelativePathPattern _right; |
| |
| public AncestorPattern(RelativePathPattern right) { |
| this(null, right); |
| } |
| |
| public AncestorPattern(Pattern left, RelativePathPattern right) { |
| _left = left; |
| (_right = right).setParent(this); |
| if (left != null) { |
| left.setParent(this); |
| } |
| } |
| |
| public void setParser(Parser parser) { |
| super.setParser(parser); |
| if (_left != null) { |
| _left.setParser(parser); |
| } |
| _right.setParser(parser); |
| } |
| |
| public boolean isWildcard() { |
| //!!! can be wildcard |
| return false; |
| } |
| |
| public StepPattern getKernelPattern() { |
| return _right.getKernelPattern(); |
| } |
| |
| public void reduceKernelPattern() { |
| _right.reduceKernelPattern(); |
| } |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| return _right.typeCheck(stable); |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| InstructionHandle loop, eloop; |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| final String DOM_CLASS = classGen.getDOMClass(); |
| final LocalVariableGen local = |
| methodGen.addLocalVariable2("app", |
| Util.getJCRefType(NODE_SIG), |
| il.getEnd()); |
| |
| final de.fub.bytecode.generic.Instruction loadLocal = |
| new ILOAD(local.getIndex()); |
| final de.fub.bytecode.generic.Instruction storeLocal = |
| new ISTORE(local.getIndex()); |
| |
| if (_right instanceof StepPattern) { |
| il.append(DUP); |
| il.append(storeLocal); |
| _right.translate(classGen, methodGen); |
| il.append(methodGen.loadDOM()); |
| il.append(loadLocal); |
| } |
| else { |
| _right.translate(classGen, methodGen); |
| } |
| |
| if (_left != null) { |
| final int getParent = cpg.addMethodref(DOM_CLASS, |
| GET_PARENT, |
| GET_PARENT_SIG); |
| loop = il.append(new INVOKEVIRTUAL(getParent)); |
| |
| il.append(DUP); |
| il.append(storeLocal); |
| _falseList.add(il.append(new IFEQ(null))); |
| il.append(loadLocal); |
| |
| _left.translate(classGen, methodGen); |
| |
| |
| final SyntaxTreeNode p = getParent(); |
| if (p instanceof Instruction || p instanceof TopLevelElement) { |
| // do nothing |
| } |
| else { |
| il.append(loadLocal); |
| } |
| final BranchHandle exit = il.append(new GOTO(null)); |
| eloop = il.append(methodGen.loadDOM()); |
| il.append(loadLocal); |
| local.setEnd(eloop); |
| il.append(new GOTO(loop)); |
| exit.setTarget(il.append(NOP)); |
| _left.backPatchFalseList(eloop); |
| |
| _trueList.append(_left._trueList); |
| } |
| else { |
| il.append(POP2); |
| } |
| methodGen.removeLocalVariable(local); |
| |
| _trueList.append(_right._trueList); |
| _falseList.append(_right._falseList); |
| } |
| |
| public String toString() { |
| return "AncestorPattern(" + _left + ", " + _right + ')'; |
| } |
| } |