--- /dev/null 2019-06-07 20:25:48.603619976 +0000 +++ new/src/java.xml/share/classes/com/sun/org/apache/bcel/internal/classfile/ModuleProvides.java 2020-01-16 18:05:09.453927700 +0000 @@ -0,0 +1,125 @@ +/* + * 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 represents an entry in the provides table of the Module attribute. + * Each entry describes a service implementation that the parent module provides. + * + * @see Module + * @since 6.4.0 + */ +public final class ModuleProvides implements Cloneable, Node { + + private final int provides_index; // points to CONSTANT_Class_info + private final int provides_with_count; + private final int[] provides_with_index; // points to CONSTANT_Class_info + + + /** + * Construct object from file stream. + * + * @param file Input stream + * @throws IOException if an I/O Exception occurs in readUnsignedShort + */ + ModuleProvides(final DataInput file) throws IOException { + provides_index = file.readUnsignedShort(); + provides_with_count = file.readUnsignedShort(); + provides_with_index = new int[provides_with_count]; + for (int i = 0; i < provides_with_count; i++) { + provides_with_index[i] = file.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.visitModuleProvides(this); + } + + // TODO add more getters and setters? + + /** + * Dump table entry to file stream in binary format. + * + * @param file Output file stream + * @throws IOException if an I/O Exception occurs in writeShort + */ + public void dump( final DataOutputStream file ) throws IOException { + file.writeShort(provides_index); + file.writeShort(provides_with_count); + for (final int entry : provides_with_index) { + file.writeShort(entry); + } + } + + + /** + * @return String representation + */ + @Override + public String toString() { + return "provides(" + provides_index + ", " + provides_with_count + ", ...)"; + } + + + /** + * @return Resolved string representation + */ + public String toString( final ConstantPool constant_pool ) { + final StringBuilder buf = new StringBuilder(); + final String interface_name = constant_pool.constantToString(provides_index, Const.CONSTANT_Class); + buf.append(Utility.compactClassName(interface_name, false)); + buf.append(", with(").append(provides_with_count).append("):\n"); + for (final int index : provides_with_index) { + final String class_name = constant_pool.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 object + */ + public ModuleProvides copy() { + try { + return (ModuleProvides) clone(); + } catch (final CloneNotSupportedException e) { + // TODO should this throw? + } + return null; + } +}