/*
* @(#)$Id: ValueOf.java,v 1.9 2003/01/30 18:46:02 mkwan Exp $
*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xalan" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2001, Sun
* Microsystems., http://www.sun.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
* @author Morten Jorgensen
*
*/
package org.apache.xalan.xsltc.compiler;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.INVOKEINTERFACE;
import org.apache.bcel.generic.INVOKEVIRTUAL;
import org.apache.bcel.generic.InstructionList;
import org.apache.bcel.generic.PUSH;
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;
final class ValueOf extends Instruction {
private Expression _select;
private boolean _escaping = true;
public void display(int indent) {
indent(indent);
Util.println("ValueOf");
indent(indent + IndentIncrement);
Util.println("select " + _select.toString());
}
public void parseContents(Parser parser) {
_select = parser.parseExpression(this, "select", null);
// make sure required attribute(s) have been set
if (_select.isDummy()) {
reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "select");
return;
}
final String str = getAttribute("disable-output-escaping");
if ((str != null) && (str.equals("yes"))) _escaping = false;
}
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
Type type = _select.typeCheck(stable);
if ((type != null) && (type.identicalTo(Type.String) == false))
_select = new CastExpr(_select, Type.String);
return Type.Void;
}
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
final int setEscaping = cpg.addInterfaceMethodref(OUTPUT_HANDLER,
"setEscaping","(Z)Z");
final int characters = cpg.addMethodref(TRANSLET_CLASS,
CHARACTERSW,
CHARACTERSW_SIG);
// Turn off character escaping if so is wanted.
if (!_escaping) {
il.append(methodGen.loadHandler());
il.append(new PUSH(cpg,false));
il.append(new INVOKEINTERFACE(setEscaping,2));
}
// Translate the contents.
il.append(classGen.loadTranslet());
_select.translate(classGen, methodGen);
il.append(methodGen.loadHandler());
il.append(new INVOKEVIRTUAL(characters));
// Restore character escaping setting to whatever it was.
if (!_escaping) {
il.append(methodGen.loadHandler());
il.append(SWAP);
il.append(new INVOKEINTERFACE(setEscaping,2));
il.append(POP);
}
}
}