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   *  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: ReferenceType.java,v 1.2.4.1 2005/09/05 11:29:12 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util;
  
  import jaxp.sun.org.apache.bcel.internal.generic.ALOAD;
  import jaxp.sun.org.apache.bcel.internal.generic.ASTORE;
  import jaxp.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  import jaxp.sun.org.apache.bcel.internal.generic.IFEQ;
  import jaxp.sun.org.apache.bcel.internal.generic.ILOAD;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
  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.PUSH;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.Constants;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.FlowList;
  import jaxp.sun.org.apache.xml.internal.dtm.DTM;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   * @author Erwin Bolwidt <ejb@klomp.org>
   */
  public final class ReferenceType extends Type {
    protected ReferenceType() {}
  
    /**
     * Translates reference into object of internal type <code>type</code>.
     *
     * @see Type#translateTo
     */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, StringType type) {
      final int current = methodGen.getLocalIndex("current");
      ConstantPoolGen cpg = classGen.getConstantPool();
      InstructionList il = methodGen.getInstructionList();
  
      // If no current, conversion is a top-level
      if (current < 0) {
        il.append(new PUSH(cpg, DTM.ROOT_NODE)); // push root node
      } else {
        il.append(new ILOAD(current));
      }
      il.append(methodGen.loadDOM());
      final int stringF =
          cpg.addMethodref(
              BASIS_LIBRARY_CLASS,
              "stringF",
              "(" + OBJECT_SIG + NODE_SIG + DOM_INTF_SIG + ")" + STRING_SIG);
      il.append(new INVOKESTATIC(stringF));
    }  public String toString() {
      return "reference";
    }
  
    /**
     * Translates a reference into an object of internal type <code>type</code>.
     *
     * @see Type#translateTo
     */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, RealType type) {
      final ConstantPoolGen cpg = classGen.getConstantPool();
      final InstructionList il = methodGen.getInstructionList();
  
      il.append(methodGen.loadDOM());
      int index =
          cpg.addMethodref(BASIS_LIBRARY_CLASS, "numberF", "(" + OBJECT_SIG + DOM_INTF_SIG + ")D");
      il.append(new INVOKESTATIC(index));
    }  public boolean identicalTo(Type other) {
      return this == other;
    }
  
    /**
     * Casts a reference into a NodeIterator.
     *
     * @see Type#translateTo
     */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, NodeSetType type) {
      final ConstantPoolGen cpg = classGen.getConstantPool();
      final InstructionList il = methodGen.getInstructionList();
      int index =
          cpg.addMethodref(
              BASIS_LIBRARY_CLASS, "referenceToNodeSet", "(" + OBJECT_SIG + ")" + NODE_ITERATOR_SIG);
      il.append(new INVOKESTATIC(index));
  
      // Reset this iterator
      index = cpg.addInterfaceMethodref(NODE_ITERATOR, RESET, RESET_SIG);
      il.append(new INVOKEINTERFACE(index, 1));
    }  public String toSignature() {
      return "Ljava/lang/Object;";
    }
  
    /**
     * Casts a reference into a Node.
     *
     * @see Type#translateTo
     */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, NodeType type) {
      translateTo(classGen, methodGen, NodeSet);
      NodeSet.translateTo(classGen, methodGen, type);
    }  public jaxp.sun.org.apache.bcel.internal.generic.Type toJCType() {
      return jaxp.sun.org.apache.bcel.internal.generic.Type.OBJECT;
    }
  
    /**
     * Casts a reference into a ResultTree.
     *
     * @see Type#translateTo
     */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, ResultTreeType type) {
      final ConstantPoolGen cpg = classGen.getConstantPool();
      final InstructionList il = methodGen.getInstructionList();
      int index =
          cpg.addMethodref(
              BASIS_LIBRARY_CLASS, "referenceToResultTree", "(" + OBJECT_SIG + ")" + DOM_INTF_SIG);
      il.append(new INVOKESTATIC(index));
    }  /**
     * Translates a reference to an object of internal type <code>type</code>. The translation to int
     * is undefined since references are always converted to reals in arithmetic expressions.
     *
     * @see Type#translateTo
     */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, Type type) {
      if (type == String) {
        translateTo(classGen, methodGen, (StringType) type);
      } else if (type == Real) {
        translateTo(classGen, methodGen, (RealType) type);
      } else if (type == Boolean) {
        translateTo(classGen, methodGen, (BooleanType) type);
      } else if (type == NodeSet) {
        translateTo(classGen, methodGen, (NodeSetType) type);
      } else if (type == Node) {
        translateTo(classGen, methodGen, (NodeType) type);
      } else if (type == ResultTree) {
        translateTo(classGen, methodGen, (ResultTreeType) type);
      } else if (type == Object) {
        translateTo(classGen, methodGen, (ObjectType) type);
      } else if (type == Reference) {
      } else {
        ErrorMsg err = new ErrorMsg(ErrorMsg.INTERNAL_ERR, type.toString());
        classGen.getParser().reportError(Constants.FATAL, err);
      }
    }
  
    /**
     * Subsume reference into ObjectType.
     *
     * @see Type#translateTo
     */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, ObjectType type) {
      methodGen.getInstructionList().append(NOP);
    }
  
  
  
    /**
     * Translates a reference to an object of internal type <code>type</code>.
     *
     * @see Type#translateTo
     */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, BooleanType type) {
      final ConstantPoolGen cpg = classGen.getConstantPool();
      final InstructionList il = methodGen.getInstructionList();
  
      int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, "booleanF", "(" + OBJECT_SIG + ")Z");
      il.append(new INVOKESTATIC(index));
    }
  
  
  
  
  
  
  
  
  
    /** Translates a reference into the Java type denoted by <code>clazz</code>. */
    public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, Class clazz) {
      final ConstantPoolGen cpg = classGen.getConstantPool();
      final InstructionList il = methodGen.getInstructionList();
  
      int referenceToLong =
          cpg.addMethodref(BASIS_LIBRARY_CLASS, "referenceToLong", "(" + OBJECT_SIG + ")J");
      int referenceToDouble =
          cpg.addMethodref(BASIS_LIBRARY_CLASS, "referenceToDouble", "(" + OBJECT_SIG + ")D");
      int referenceToBoolean =
          cpg.addMethodref(BASIS_LIBRARY_CLASS, "referenceToBoolean", "(" + OBJECT_SIG + ")Z");
  
      if (clazz.getName().equals("java.lang.Object")) {
        il.append(NOP);
      } else if (clazz == Double.TYPE) {
        il.append(new INVOKESTATIC(referenceToDouble));
      } else if (clazz.getName().equals("java.lang.Double")) {
        il.append(new INVOKESTATIC(referenceToDouble));
        Real.translateTo(classGen, methodGen, Reference);
      } else if (clazz == Float.TYPE) {
        il.append(new INVOKESTATIC(referenceToDouble));
        il.append(D2F);
      } else if (clazz.getName().equals("java.lang.String")) {
        int index =
            cpg.addMethodref(
                BASIS_LIBRARY_CLASS,
                "referenceToString",
                "(" + OBJECT_SIG + DOM_INTF_SIG + ")" + "Ljava/lang/String;");
        il.append(methodGen.loadDOM());
        il.append(new INVOKESTATIC(index));
      } else if (clazz.getName().equals("org.w3c.dom.Node")) {
        int index =
            cpg.addMethodref(
                BASIS_LIBRARY_CLASS,
                "referenceToNode",
                "(" + OBJECT_SIG + DOM_INTF_SIG + ")" + "Lorg/w3c/dom/Node;");
        il.append(methodGen.loadDOM());
        il.append(new INVOKESTATIC(index));
      } else if (clazz.getName().equals("org.w3c.dom.NodeList")) {
        int index =
            cpg.addMethodref(
                BASIS_LIBRARY_CLASS,
                "referenceToNodeList",
                "(" + OBJECT_SIG + DOM_INTF_SIG + ")" + "Lorg/w3c/dom/NodeList;");
        il.append(methodGen.loadDOM());
        il.append(new INVOKESTATIC(index));
      } else if (clazz.getName().equals("jaxp.sun.org.apache.xalan.internal.xsltc.DOM")) {
        translateTo(classGen, methodGen, ResultTree);
      } else if (clazz == Long.TYPE) {
        il.append(new INVOKESTATIC(referenceToLong));
      } else if (clazz == Integer.TYPE) {
        il.append(new INVOKESTATIC(referenceToLong));
        il.append(L2I);
      } else if (clazz == Short.TYPE) {
        il.append(new INVOKESTATIC(referenceToLong));
        il.append(L2I);
        il.append(I2S);
      } else if (clazz == Byte.TYPE) {
        il.append(new INVOKESTATIC(referenceToLong));
        il.append(L2I);
        il.append(I2B);
      } else if (clazz == Character.TYPE) {
        il.append(new INVOKESTATIC(referenceToLong));
        il.append(L2I);
        il.append(I2C);
      } else if (clazz == java.lang.Boolean.TYPE) {
        il.append(new INVOKESTATIC(referenceToBoolean));
      } else if (clazz.getName().equals("java.lang.Boolean")) {
        il.append(new INVOKESTATIC(referenceToBoolean));
        translateTo(classGen, methodGen, Reference);
      } else {
        ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, toString(), clazz.getName());
        classGen.getParser().reportError(Constants.FATAL, err);
      }
    }
  
    /**
     * Translates an external Java type into a reference. Only conversion allowed is from
     * java.lang.Object.
     */
    public void translateFrom(ClassGenerator classGen, MethodGenerator methodGen, Class clazz) {
      if (clazz.getName().equals("java.lang.Object")) {
        methodGen.getInstructionList().append(NOP);
      } else {
        ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, toString(), clazz.getName());
        classGen.getParser().reportError(Constants.FATAL, err);
      }
    }
  
    /**
     * Expects a reference on the stack and translates it to a non-synthesized boolean. It does not
     * push a 0 or a 1 but instead returns branchhandle list to be appended to the false list.
     *
     * @see Type#translateToDesynthesized
     */
    public FlowList translateToDesynthesized(
        ClassGenerator classGen, MethodGenerator methodGen, BooleanType type) {
      InstructionList il = methodGen.getInstructionList();
      translateTo(classGen, methodGen, type);
      return new FlowList(il.append(new IFEQ(null)));
    }
  
    /** Translates an object of this type to its boxed representation. */
    public void translateBox(ClassGenerator classGen, MethodGenerator methodGen) {}
  
    /** Translates an object of this type to its unboxed representation. */
    public void translateUnBox(ClassGenerator classGen, MethodGenerator methodGen) {}
  
    public Instruction LOAD(int slot) {
      return new ALOAD(slot);
    }
  
    public Instruction STORE(int slot) {
      return new ASTORE(slot);
    }
  }
  