- /*
- * 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 1.8 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.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());
- }
- }
- }