/*
* @(#)$Id: CallTemplate.java,v 1.12 2003/01/30 18:45:59 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 Erwin Bolwidt <ejb@klomp.org>
*
*/
package org.apache.xalan.xsltc.compiler;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.INVOKEVIRTUAL;
import org.apache.bcel.generic.InstructionList;
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 CallTemplate extends Instruction {
private QName _name;
public void display(int indent) {
indent(indent);
System.out.print("CallTemplate");
Util.println(" name " + _name);
displayContents(indent + IndentIncrement);
}
public boolean hasWithParams() {
return elementCount() > 0;
}
public void parseContents(Parser parser) {
_name = parser.getQNameIgnoreDefaultNs(getAttribute("name"));
parseChildren(parser);
}
/**
* Verify that a template with this name exists.
*/
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
final Template template = stable.lookupTemplate(_name);
if (template != null) {
typeCheckContents(stable);
}
else {
ErrorMsg err = new ErrorMsg(ErrorMsg.TEMPLATE_UNDEF_ERR,_name,this);
throw new TypeCheckError(err);
}
return Type.Void;
}
/**
* Translate call-template.
* A parameter frame is pushed only if some template in the stylesheet
* uses parameters.
* TODO: optimize by checking if the callee has parameters.
*/
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final Stylesheet stylesheet = classGen.getStylesheet();
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
if (stylesheet.hasLocalParams() || hasContents()) {
// Push parameter frame
final int push = cpg.addMethodref(TRANSLET_CLASS,
PUSH_PARAM_FRAME,
PUSH_PARAM_FRAME_SIG);
il.append(classGen.loadTranslet());
il.append(new INVOKEVIRTUAL(push));
// Translate with-params
translateContents(classGen, methodGen);
}
final String className = stylesheet.getClassName();
// Generate a valid Java method name
String methodName = Util.escape(_name.toString());
il.append(classGen.loadTranslet());
il.append(methodGen.loadDOM());
il.append(methodGen.loadIterator());
il.append(methodGen.loadHandler());
il.append(methodGen.loadCurrentNode());
il.append(new INVOKEVIRTUAL(cpg.addMethodref(className,
methodName,
"("
+ DOM_INTF_SIG
+ NODE_ITERATOR_SIG
+ TRANSLET_OUTPUT_SIG
+ NODE_SIG
+")V")));
if (stylesheet.hasLocalParams() || hasContents()) {
// Pop parameter frame
final int pop = cpg.addMethodref(TRANSLET_CLASS,
POP_PARAM_FRAME,
POP_PARAM_FRAME_SIG);
il.append(classGen.loadTranslet());
il.append(new INVOKEVIRTUAL(pop));
}
}
}