content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2001-2004 The Apache Software Foundation.
   *
   * Licensed 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: ConcatCall.java,v 1.2.4.1 2005/09/01 12:07:31 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler;
  
  import java.util.Vector;
  
  import jaxp.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
  import jaxp.sun.org.apache.bcel.internal.generic.Instruction;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionList;
  import jaxp.sun.org.apache.bcel.internal.generic.NEW;
  import jaxp.sun.org.apache.bcel.internal.generic.PUSH;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   */
  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, 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));
          }
      }
  }
  