| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * 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. |
| */ |
| |
| package com.sun.org.apache.bcel.internal.classfile; |
| |
| import java.io.DataInput; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| |
| /** |
| * This class is derived from <em>Attribute</em> and records the classes and interfaces that |
| * are authorized to claim membership in the nest hosted by the current class or interface. |
| * There may be at most one NestMembers attribute in a ClassFile structure. |
| * |
| * @see Attribute |
| */ |
| public final class NestMembers extends Attribute { |
| |
| private int[] classes; |
| |
| |
| /** |
| * Initialize from another object. Note that both objects use the same |
| * references (shallow copy). Use copy() for a physical copy. |
| */ |
| public NestMembers(final NestMembers c) { |
| this(c.getNameIndex(), c.getLength(), c.getClasses(), c.getConstantPool()); |
| } |
| |
| |
| /** |
| * @param name_index Index in constant pool |
| * @param length Content length in bytes |
| * @param classes Table of indices in constant pool |
| * @param constant_pool Array of constants |
| */ |
| public NestMembers(final int name_index, final int length, final int[] classes, |
| final ConstantPool constant_pool) { |
| super(Const.ATTR_NEST_MEMBERS, name_index, length, constant_pool); |
| this.classes = classes != null ? classes : new int[0]; |
| } |
| |
| |
| /** |
| * Construct object from input stream. |
| * @param name_index Index in constant pool |
| * @param length Content length in bytes |
| * @param input Input stream |
| * @param constant_pool Array of constants |
| * @throws IOException |
| */ |
| NestMembers(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) throws IOException { |
| this(name_index, length, (int[]) null, constant_pool); |
| final int number_of_classes = input.readUnsignedShort(); |
| classes = new int[number_of_classes]; |
| for (int i = 0; i < number_of_classes; i++) { |
| classes[i] = input.readUnsignedShort(); |
| } |
| } |
| |
| |
| /** |
| * Called by objects that are traversing the nodes of the tree implicitely |
| * defined by the contents of a Java class. I.e., the hierarchy of methods, |
| * fields, attributes, etc. spawns a tree of objects. |
| * |
| * @param v Visitor object |
| */ |
| @Override |
| public void accept( final Visitor v ) { |
| v.visitNestMembers(this); |
| } |
| |
| |
| /** |
| * Dump NestMembers attribute to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| @Override |
| public void dump( final DataOutputStream file ) throws IOException { |
| super.dump(file); |
| file.writeShort(classes.length); |
| for (final int index : classes) { |
| file.writeShort(index); |
| } |
| } |
| |
| |
| /** |
| * @return array of indices into constant pool of class names. |
| */ |
| public int[] getClasses() { |
| return classes; |
| } |
| |
| |
| /** |
| * @return Length of classes table. |
| */ |
| public int getNumberClasses() { |
| return classes == null ? 0 : classes.length; |
| } |
| |
| |
| /** |
| * @return string array of class names |
| */ |
| public String[] getClassNames() { |
| final String[] names = new String[classes.length]; |
| for (int i = 0; i < classes.length; i++) { |
| names[i] = super.getConstantPool().getConstantString(classes[i], |
| Const.CONSTANT_Class).replace('/', '.'); |
| } |
| return names; |
| } |
| |
| |
| /** |
| * @param classes the list of class indexes |
| * Also redefines number_of_classes according to table length. |
| */ |
| public void setClasses( final int[] classes ) { |
| this.classes = classes != null ? classes : new int[0]; |
| } |
| |
| |
| /** |
| * @return String representation, i.e., a list of classes. |
| */ |
| @Override |
| public String toString() { |
| final StringBuilder buf = new StringBuilder(); |
| buf.append("NestMembers("); |
| buf.append(classes.length); |
| buf.append("):\n"); |
| for (final int index : classes) { |
| final String class_name = super.getConstantPool().getConstantString(index, Const.CONSTANT_Class); |
| buf.append(" ").append(Utility.compactClassName(class_name, false)).append("\n"); |
| } |
| return buf.substring(0, buf.length()-1); // remove the last newline |
| } |
| |
| |
| /** |
| * @return deep copy of this attribute |
| */ |
| @Override |
| public Attribute copy( final ConstantPool _constant_pool ) { |
| final NestMembers c = (NestMembers) clone(); |
| if (classes != null) { |
| c.classes = new int[classes.length]; |
| System.arraycopy(classes, 0, c.classes, 0, |
| classes.length); |
| } |
| c.setConstantPool(_constant_pool); |
| return c; |
| } |
| } |