| /* |
| * 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: Comment.java,v 1.2.4.1 2005/09/01 12:02:37 pvedula 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.GETFIELD; |
| import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE; |
| import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL; |
| import com.sun.org.apache.bcel.internal.generic.PUSH; |
| 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 Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| */ |
| final class Comment extends Instruction { |
| |
| public void parseContents(Parser parser) { |
| parseChildren(parser); |
| } |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| typeCheckContents(stable); |
| return Type.String; |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| // Shortcut for literal strings |
| Text rawText = null; |
| if (elementCount() == 1) { |
| Object content = elementAt(0); |
| if (content instanceof Text) { |
| rawText = (Text) content; |
| } |
| } |
| |
| // If the content is literal text, call comment(char[],int,int) or |
| // comment(String), as appropriate. Otherwise, use a |
| // StringValueHandler to gather the textual content of the xsl:comment |
| // and call comment(String) with the result. |
| if (rawText != null) { |
| il.append(methodGen.loadHandler()); |
| |
| if (rawText.canLoadAsArrayOffsetLength()) { |
| rawText.loadAsArrayOffsetLength(classGen, methodGen); |
| final int comment = |
| cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE, |
| "comment", |
| "([CII)V"); |
| il.append(new INVOKEINTERFACE(comment, 4)); |
| } else { |
| il.append(new PUSH(cpg, rawText.getText())); |
| final int comment = |
| cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE, |
| "comment", |
| "(" + STRING_SIG + ")V"); |
| il.append(new INVOKEINTERFACE(comment, 2)); |
| } |
| } else { |
| // Save the current handler base on the stack |
| il.append(methodGen.loadHandler()); |
| il.append(DUP); // first arg to "comment" call |
| |
| // Get the translet's StringValueHandler |
| il.append(classGen.loadTranslet()); |
| il.append(new GETFIELD(cpg.addFieldref(TRANSLET_CLASS, |
| "stringValueHandler", |
| STRING_VALUE_HANDLER_SIG))); |
| il.append(DUP); |
| il.append(methodGen.storeHandler()); |
| |
| // translate contents with substituted handler |
| translateContents(classGen, methodGen); |
| |
| // get String out of the handler |
| il.append(new INVOKEVIRTUAL(cpg.addMethodref(STRING_VALUE_HANDLER, |
| "getValue", |
| "()" + STRING_SIG))); |
| // call "comment" |
| final int comment = |
| cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE, |
| "comment", |
| "(" + STRING_SIG + ")V"); |
| il.append(new INVOKEINTERFACE(comment, 2)); |
| // Restore old handler base from stack |
| il.append(methodGen.storeHandler()); |
| } |
| } |
| } |