- /*
- * 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: NameBase.java,v 1.12 2004/02/16 22:24:29 minchau Exp $
- */
-
- package com.sun.org.apache.xalan.internal.xsltc.compiler;
-
- import java.util.Vector;
-
- import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
- import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
- import com.sun.org.apache.bcel.internal.generic.InstructionList;
- 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.Type;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
-
- /**
- * @author Morten Jorgensen
- * @author Erwin Bolwidt <ejb@klomp.org>
- */
- class NameBase extends FunctionCall {
-
- private Expression _param = null;
- private Type _paramType = Type.Node;
-
- /**
- * Handles calls with no parameter (current node is implicit parameter).
- */
- public NameBase(QName fname) {
- super(fname);
- }
-
- /**
- * Handles calls with one parameter (either node or node-set).
- */
- public NameBase(QName fname, Vector arguments) {
- super(fname, arguments);
- _param = argument(0);
- }
-
-
- /**
- * Check that we either have no parameters or one parameter that is
- * either a node or a node-set.
- */
- public Type typeCheck(SymbolTable stable) throws TypeCheckError {
-
- // Check the argument type (if any)
- switch(argumentCount()) {
- case 0:
- _paramType = Type.Node;
- break;
- case 1:
- _paramType = _param.typeCheck(stable);
- break;
- default:
- throw new TypeCheckError(this);
- }
-
- // The argument has to be a node, a node-set or a node reference
- if ((_paramType != Type.NodeSet) &&
- (_paramType != Type.Node) &&
- (_paramType != Type.Reference)) {
- throw new TypeCheckError(this);
- }
-
- return (_type = Type.String);
- }
-
- public Type getType() {
- return _type;
- }
-
- /**
- * Translate the code required for getting the node for which the
- * QName, local-name or namespace URI should be extracted.
- */
- public void translate(ClassGenerator classGen,
- MethodGenerator methodGen) {
- final ConstantPoolGen cpg = classGen.getConstantPool();
- final InstructionList il = methodGen.getInstructionList();
-
- il.append(methodGen.loadDOM());
-
- // Function was called with no parameters
- if (argumentCount() == 0) {
- il.append(methodGen.loadContextNode());
- }
- // Function was called with node parameter
- else if (_paramType == Type.Node) {
- _param.translate(classGen, methodGen);
- }
- else if (_paramType == Type.Reference) {
- _param.translate(classGen, methodGen);
- il.append(new INVOKESTATIC(cpg.addMethodref
- (BASIS_LIBRARY_CLASS,
- "referenceToNodeSet",
- "("
- + OBJECT_SIG
- + ")"
- + NODE_ITERATOR_SIG)));
- il.append(methodGen.nextNode());
- }
- // Function was called with node-set parameter
- else {
- _param.translate(classGen, methodGen);
- _param.startIterator(classGen, methodGen);
- il.append(methodGen.nextNode());
- }
- }
- }