FileDocCategorySizeDatePackage
ConcatCall.javaAPI DocJava SE 6 API3159Tue Jun 10 00:22:28 BST 2008com.sun.org.apache.xalan.internal.xsltc.compiler

ConcatCall

public final class ConcatCall extends FunctionCall
author
Jacek Ambroziak
author
Santiago Pericas-Geertsen

Fields Summary
Constructors Summary
public ConcatCall(QName fname, Vector arguments)

	super(fname, arguments);
    
Methods Summary
public voidtranslate(com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator classGen, com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator methodGen)
translate leaves a String on the stack

	final ConstantPoolGen cpg = classGen.getConstantPool();
	final InstructionList il = methodGen.getInstructionList();
	final int nArgs = argumentCount();
	
	switch (nArgs) {
	case 0:
	    il.append(new PUSH(cpg, 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));
	}
    
public com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypetypeCheck(com.sun.org.apache.xalan.internal.xsltc.compiler.SymbolTable stable)

	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;