- package com.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.
- *
- * @version $Id: DescendingVisitor.java,v 1.1.1.1 2001/10/29 20:00:00 jvanzyl Exp $
- * @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 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 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();
- }
- }