/*
* @(#)$Id$
*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001 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
*
*/
package org.apache.xalan.xsltc.compiler;
import java.util.Vector;
import java.util.Enumeration;
import org.apache.xalan.xsltc.compiler.util.Type;
import de.fub.bytecode.generic.Instruction;
import de.fub.bytecode.generic.*;
import org.apache.xalan.xsltc.compiler.util.*;
final class ConcatCall extends FunctionCall {
public ConcatCall(QName fname, Vector arguments) {
super(fname, arguments);
}
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
for (int i = 0; i < argumentCount(); i++) {
final Expression exp = argument(i);
if (!exp.typeCheck(stable).identicalTo(Type.String)) {
setArgument(i, new CastExpr(exp, Type.String));
}
}
return _type = Type.String;
}
/** translate leaves a String on the stack */
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
final int nArgs = argumentCount();
switch (nArgs) {
case 0:
il.append(new PUSH(cpg, Constants.EMPTYSTRING));
break;
case 1:
argument().translate(classGen, methodGen);
break;
default:
final int initBuffer = cpg.addMethodref(STRING_BUFFER_CLASS,
"<init>", "()V");
final Instruction append =
new INVOKEVIRTUAL(cpg.addMethodref(STRING_BUFFER_CLASS,
"append",
"("+STRING_SIG+")"
+STRING_BUFFER_SIG));
final int toString = cpg.addMethodref(STRING_BUFFER_CLASS,
"toString",
"()"+STRING_SIG);
il.append(new NEW(cpg.addClass(STRING_BUFFER_CLASS)));
il.append(DUP);
il.append(new INVOKESPECIAL(initBuffer));
for (int i = 0; i < nArgs; i++) {
argument(i).translate(classGen, methodGen);
il.append(append);
}
il.append(new INVOKEVIRTUAL(toString));
}
}
}