| /* |
| * 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: UseAttributeSets.java,v 1.5 2005/09/28 13:48:17 pvedula Exp $ |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.compiler; |
| |
| import java.util.StringTokenizer; |
| import java.util.Vector; |
| |
| import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; |
| import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL; |
| 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.ErrorMsg; |
| 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 Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| */ |
| final class UseAttributeSets extends Instruction { |
| |
| // Only error that can occur: |
| private final static String ATTR_SET_NOT_FOUND = |
| ""; |
| |
| // Contains the names of all references attribute sets |
| private final Vector _sets = new Vector(2); |
| |
| /** |
| * Constructur - define initial attribute sets to use |
| */ |
| public UseAttributeSets(String setNames, Parser parser) { |
| setParser(parser); |
| addAttributeSets(setNames); |
| } |
| |
| /** |
| * This method is made public to enable an AttributeSet object to merge |
| * itself with another AttributeSet (including any other AttributeSets |
| * the two may inherit from). |
| */ |
| public void addAttributeSets(String setNames) { |
| if ((setNames != null) && (!setNames.equals(Constants.EMPTYSTRING))) { |
| final StringTokenizer tokens = new StringTokenizer(setNames); |
| while (tokens.hasMoreTokens()) { |
| final QName qname = |
| getParser().getQNameIgnoreDefaultNs(tokens.nextToken()); |
| _sets.add(qname); |
| } |
| } |
| } |
| |
| /** |
| * Do nada. |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| return Type.Void; |
| } |
| |
| /** |
| * Generate a call to the method compiled for this attribute set |
| */ |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| final SymbolTable symbolTable = getParser().getSymbolTable(); |
| |
| // Go through each attribute set and generate a method call |
| for (int i=0; i<_sets.size(); i++) { |
| // Get the attribute set name |
| final QName name = (QName)_sets.elementAt(i); |
| // Get the AttributeSet reference from the symbol table |
| final AttributeSet attrs = symbolTable.lookupAttributeSet(name); |
| // Compile the call to the set's method if the set exists |
| if (attrs != null) { |
| final String methodName = attrs.getMethodName(); |
| il.append(classGen.loadTranslet()); |
| il.append(methodGen.loadDOM()); |
| il.append(methodGen.loadIterator()); |
| il.append(methodGen.loadHandler()); |
| il.append(methodGen.loadCurrentNode()); |
| final int method = cpg.addMethodref(classGen.getClassName(), |
| methodName, ATTR_SET_SIG); |
| il.append(new INVOKESPECIAL(method)); |
| } |
| // Generate an error if the attribute set does not exist |
| else { |
| final Parser parser = getParser(); |
| final String atrs = name.toString(); |
| reportError(this, parser, ErrorMsg.ATTRIBSET_UNDEF_ERR, atrs); |
| } |
| } |
| } |
| } |