code: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements. See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership. The ASF licenses this file
   * to you 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.
   */
  /*
   * $Id$
   */
  
  package org.apache.xalan.xsltc.compiler;
  
  import java.util.Vector;
  
  import org.apache.bcel.generic.ConstantPoolGen;
  import org.apache.bcel.generic.INVOKEINTERFACE;
  import org.apache.bcel.generic.InstructionList;
  import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
  import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
  import org.apache.xalan.xsltc.compiler.util.StringType;
  import org.apache.xalan.xsltc.compiler.util.Type;
  import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   * @author Morten Jorgensen
   */
  final class UnparsedEntityUriCall extends FunctionCall {
      private Expression _entity;
  
      public UnparsedEntityUriCall(QName fname, Vector arguments) {
          super(fname, arguments);
          _entity = argument();
      }
  
      public Type typeCheck(SymbolTable stable) throws TypeCheckError {
          final Type entity = _entity.typeCheck(stable);
          if (entity instanceof StringType == false) {
              _entity = new CastExpr(_entity, Type.String);
          }
          return _type = Type.String;
      }
      
      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
          final ConstantPoolGen cpg = classGen.getConstantPool();
          final InstructionList il = methodGen.getInstructionList();
          // Push the this pointer on the stack...
          il.append(methodGen.loadDOM());
          // ...then the entity name...
          _entity.translate(classGen, methodGen);
          // ...to get the URI from the DOM object.
          il.append(new INVOKEINTERFACE(
                           cpg.addInterfaceMethodref(DOM_INTF,
                                                     GET_UNPARSED_ENTITY_URI,
                                                     GET_UNPARSED_ENTITY_URI_SIG),
                           2));
      }
  }
  