- /*
- * 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: AbsoluteLocationPath.java,v 1.8 2004/02/16 22:24:29 minchau Exp $
- */
-
- package com.sun.org.apache.xalan.internal.xsltc.compiler;
-
- import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
- import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
- import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
- import com.sun.org.apache.bcel.internal.generic.InstructionList;
- import com.sun.org.apache.bcel.internal.generic.NEW;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeType;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
-
- /**
- * @author Jacek Ambroziak
- * @author Santiago Pericas-Geertsen
- */
- final class AbsoluteLocationPath extends Expression {
- private Expression _path; // may be null
-
- public AbsoluteLocationPath() {
- _path = null;
- }
-
- public AbsoluteLocationPath(Expression path) {
- _path = path;
- if (path != null) {
- _path.setParent(this);
- }
- }
-
- public void setParser(Parser parser) {
- super.setParser(parser);
- if (_path != null) {
- _path.setParser(parser);
- }
- }
-
- public Expression getPath() {
- return(_path);
- }
-
- public String toString() {
- return "AbsoluteLocationPath(" +
- (_path != null ? _path.toString() : "null") + ')';
- }
-
- public Type typeCheck(SymbolTable stable) throws TypeCheckError {
- if (_path != null) {
- final Type ptype = _path.typeCheck(stable);
- if (ptype instanceof NodeType) { // promote to node-set
- _path = new CastExpr(_path, Type.NodeSet);
- }
- }
- return _type = Type.NodeSet;
- }
-
- public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
- final ConstantPoolGen cpg = classGen.getConstantPool();
- final InstructionList il = methodGen.getInstructionList();
- if (_path != null) {
- final int initAI = cpg.addMethodref(ABSOLUTE_ITERATOR,
- "<init>",
- "("
- + NODE_ITERATOR_SIG
- + ")V");
- // Create new AbsoluteIterator
- il.append(new NEW(cpg.addClass(ABSOLUTE_ITERATOR)));
- il.append(DUP);
-
- // Compile relative path iterator(s)
- _path.translate(classGen, methodGen);
-
- // Initialize AbsoluteIterator with iterator from the stack
- il.append(new INVOKESPECIAL(initAI));
- }
- else {
- final int gitr = cpg.addInterfaceMethodref(DOM_INTF,
- "getIterator",
- "()"+NODE_ITERATOR_SIG);
- il.append(methodGen.loadDOM());
- il.append(new INVOKEINTERFACE(gitr, 1));
- }
- }
- }