/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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: ProcessingInstruction.java 468650 2006-10-28 07:03:30Z minchau $
*/
package org.apache.xalan.xsltc.compiler;
import org.apache.bcel.generic.ALOAD;
import org.apache.bcel.generic.ASTORE;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.GETFIELD;
import org.apache.bcel.generic.INVOKEINTERFACE;
import org.apache.bcel.generic.INVOKESTATIC;
import org.apache.bcel.generic.INVOKEVIRTUAL;
import org.apache.bcel.generic.InstructionList;
import org.apache.bcel.generic.LocalVariableGen;
import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
import org.apache.xalan.xsltc.compiler.util.ErrorMsg;
import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
import org.apache.xalan.xsltc.compiler.util.Type;
import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
import org.apache.xalan.xsltc.compiler.util.Util;
import org.apache.xml.utils.XML11Char;
/**
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
*/
final class ProcessingInstruction extends Instruction {
private AttributeValue _name; // name treated as AVT (7.1.3)
private boolean _isLiteral = false; // specified name is not AVT
public void parseContents(Parser parser) {
final String name = getAttribute("name");
if (name.length() > 0) {
_isLiteral = Util.isLiteral(name);
if (_isLiteral) {
if (!XML11Char.isXML11ValidNCName(name)) {
ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_NCNAME_ERR, name, this);
parser.reportError(Constants.ERROR, err);
}
}
_name = AttributeValue.create(this, name, parser);
}
else
reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "name");
if (name.equals("xml")) {
reportError(this, parser, ErrorMsg.ILLEGAL_PI_ERR, "xml");
}
parseChildren(parser);
}
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
_name.typeCheck(stable);
typeCheckContents(stable);
return Type.Void;
}
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
if (!_isLiteral) {
// if the ncname is an AVT, then the ncname has to be checked at runtime if it is a valid ncname
LocalVariableGen nameValue =
methodGen.addLocalVariable2("nameValue",
Util.getJCRefType(STRING_SIG),
null);
// store the name into a variable first so _name.translate only needs to be called once
_name.translate(classGen, methodGen);
nameValue.setStart(il.append(new ASTORE(nameValue.getIndex())));
il.append(new ALOAD(nameValue.getIndex()));
// call checkNCName if the name is an AVT
final int check = cpg.addMethodref(BASIS_LIBRARY_CLASS, "checkNCName",
"("
+STRING_SIG
+")V");
il.append(new INVOKESTATIC(check));
// Save the current handler base on the stack
il.append(methodGen.loadHandler());
il.append(DUP); // first arg to "attributes" call
// load name value again
nameValue.setEnd(il.append(new ALOAD(nameValue.getIndex())));
} else {
// Save the current handler base on the stack
il.append(methodGen.loadHandler());
il.append(DUP); // first arg to "attributes" call
// Push attribute name
_name.translate(classGen, methodGen);// 2nd arg
}
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,
"getValueOfPI",
"()" + STRING_SIG)));
// call "processingInstruction"
final int processingInstruction =
cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE,
"processingInstruction",
"(" + STRING_SIG + STRING_SIG + ")V");
il.append(new INVOKEINTERFACE(processingInstruction, 3));
// Restore old handler base from stack
il.append(methodGen.storeHandler());
}
}