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!
   */
  package jaxp.sun.org.apache.bcel.internal.classfile;
  
  /* ====================================================================
   * 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 "Apache" and "Apache Software Foundation" and
   *    "Apache BCEL" 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",
   *    "Apache BCEL", 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.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  import java.util.Stack;
  
  /**
   * Traverses a JavaClass with another Visitor object 'piggy-backed'
   * that is applied to all components of a JavaClass object. I.e. this
   * class supplies the traversal strategy, other classes can make use
   * of it.
   *
   * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
   */
  public class DescendingVisitor implements Visitor {
    private JavaClass clazz;
    private Visitor   visitor;
    private Stack     stack = new Stack();
  
    /** @return container of current entitity, i.e., predecessor during traversal
     */
    public Object predecessor() {
      return predecessor(0);
    }
  
    /**
     * @param level nesting level, i.e., 0 returns the direct predecessor
     * @return container of current entitity, i.e., predecessor during traversal
     */
    public Object predecessor(int level) {
      int size = stack.size();
  
      if((size < 2) || (level < 0))
        return null;
      else
        return stack.elementAt(size - (level + 2)); // size - 1 == current
    }
  
    /** @return current object
     */
    public Object current() {
      return stack.peek();
    }
  
    /**
     * @param clazz Class to traverse
     * @param visitor visitor object to apply to all components
     */
    public DescendingVisitor(JavaClass clazz, Visitor visitor) {
      this.clazz   = clazz;
      this.visitor = visitor;
    }
  
    /**
     * Start traversal.
     */
    public void visit() { clazz.accept(this); }
  
    public void visitJavaClass(JavaClass clazz) {
      stack.push(clazz);
      clazz.accept(visitor);
  
      Field[] fields = clazz.getFields();
      for(int i=0; i < fields.length; i++)
        fields[i].accept(this);
  
      Method[] methods = clazz.getMethods();
      for(int i=0; i < methods.length; i++)
        methods[i].accept(this);
  
      Attribute[] attributes = clazz.getAttributes();
      for(int i=0; i < attributes.length; i++)
        attributes[i].accept(this);
  
      clazz.getConstantPool().accept(this);
      stack.pop();
    }
  
    public void visitField(Field field) {
      stack.push(field);
      field.accept(visitor);
  
      Attribute[] attributes = field.getAttributes();
      for(int i=0; i < attributes.length; i++)
        attributes[i].accept(this);
      stack.pop();
    }
  
    public void visitConstantValue(ConstantValue cv) {
      stack.push(cv);
      cv.accept(visitor);
      stack.pop();
    }
  
    public void visitMethod(Method method) {
      stack.push(method);
      method.accept(visitor);
  
      Attribute[] attributes = method.getAttributes();
      for(int i=0; i < attributes.length; i++)
        attributes[i].accept(this);
  
      stack.pop();
    }
  
    public void visitExceptionTable(ExceptionTable table) {
      stack.push(table);
      table.accept(visitor);
      stack.pop();
    }
  
    public void visitCode(Code code) {
      stack.push(code);
      code.accept(visitor);
  
      CodeException[] table = code.getExceptionTable();
      for(int i=0; i < table.length; i++)
        table[i].accept(this);
  
      Attribute[] attributes = code.getAttributes();
      for(int i=0; i < attributes.length; i++)
        attributes[i].accept(this);
      stack.pop();
    }
  
    public void visitCodeException(CodeException ce) {
      stack.push(ce);
      ce.accept(visitor);
      stack.pop();
    }
  
    public void visitLineNumberTable(LineNumberTable table) {
      stack.push(table);
      table.accept(visitor);
  
      LineNumber[] numbers = table.getLineNumberTable();
      for(int i=0; i < numbers.length; i++)
        numbers[i].accept(this);
      stack.pop();
    }
  
    public void visitLineNumber(LineNumber number) {
      stack.push(number);
      number.accept(visitor);
      stack.pop();
    }
  
    public void visitLocalVariableTable(LocalVariableTable table) {
      stack.push(table);
      table.accept(visitor);
  
      LocalVariable[] vars = table.getLocalVariableTable();
      for(int i=0; i < vars.length; i++)
        vars[i].accept(this);
      stack.pop();
    }
  
    public void visitLocalVariableTypeTable(LocalVariableTypeTable obj) {
      stack.push(obj);
      obj.accept(visitor);
      stack.pop();
    }
  
    public void visitStackMap(StackMap table) {
      stack.push(table);
      table.accept(visitor);
  
      StackMapEntry[] vars = table.getStackMap();
  
      for(int i=0; i < vars.length; i++)
        vars[i].accept(this);
      stack.pop();
    }
  
    public void visitStackMapEntry(StackMapEntry var) {
      stack.push(var);
      var.accept(visitor);
      stack.pop();
    }
  
    public void visitLocalVariable(LocalVariable var) {
      stack.push(var);
      var.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantPool(ConstantPool cp) {
      stack.push(cp);
      cp.accept(visitor);
  
      Constant[] constants = cp.getConstantPool();
      for(int i=1; i < constants.length; i++) {
        if(constants[i] != null)
          constants[i].accept(this);
      }
  
      stack.pop();
    }
  
    public void visitConstantClass(ConstantClass constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantDouble(ConstantDouble constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantFieldref(ConstantFieldref constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantFloat(ConstantFloat constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
   }
  
    public void visitConstantInteger(ConstantInteger constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantInterfaceMethodref(ConstantInterfaceMethodref constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantLong(ConstantLong constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantMethodref(ConstantMethodref constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantNameAndType(ConstantNameAndType constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantString(ConstantString constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitConstantUtf8(ConstantUtf8 constant) {
      stack.push(constant);
      constant.accept(visitor);
      stack.pop();
    }
  
    public void visitInnerClasses(InnerClasses ic) {
      stack.push(ic);
      ic.accept(visitor);
  
      InnerClass[] ics = ic.getInnerClasses();
      for(int i=0; i < ics.length; i++)
        ics[i].accept(this);
      stack.pop();
    }
  
    public void visitInnerClass(InnerClass inner) {
      stack.push(inner);
      inner.accept(visitor);
      stack.pop();
    }
  
    public void visitDeprecated(Deprecated attribute) {
      stack.push(attribute);
      attribute.accept(visitor);
      stack.pop();
    }
  
    public void visitSignature(Signature attribute) {
      stack.push(attribute);
      attribute.accept(visitor);
      stack.pop();
    }
  
    public void visitSourceFile(SourceFile attribute) {
      stack.push(attribute);
      attribute.accept(visitor);
      stack.pop();
    }
  
    public void visitSynthetic(Synthetic attribute) {
      stack.push(attribute);
      attribute.accept(visitor);
      stack.pop();
    }
  
    public void visitUnknown(Unknown attribute) {
      stack.push(attribute);
      attribute.accept(visitor);
      stack.pop();
   }
  }
  