| /* |
| * 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 java.util.Arrays; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| |
| /** |
| * This class represents a bootstrap method attribute, i.e., the bootstrap |
| * method ref, the number of bootstrap arguments and an array of the |
| * bootstrap arguments. |
| * |
| * @see <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.23"> |
| * The class File Format : The BootstrapMethods Attribute</a> |
| * @since 6.0 |
| */ |
| public class BootstrapMethod implements Cloneable { |
| |
| /** Index of the CONSTANT_MethodHandle_info structure in the constant_pool table */ |
| private int bootstrap_method_ref; |
| |
| /** Array of references to the constant_pool table */ |
| private int[] bootstrap_arguments; |
| |
| |
| /** |
| * Initialize from another object. |
| */ |
| public BootstrapMethod(final BootstrapMethod c) { |
| this(c.getBootstrapMethodRef(), c.getBootstrapArguments()); |
| } |
| |
| /** |
| * Construct object from input stream. |
| * |
| * @param input Input stream |
| * @throws IOException |
| */ |
| BootstrapMethod(final DataInput input) throws IOException { |
| this(input.readUnsignedShort(), input.readUnsignedShort()); |
| |
| for (int i = 0; i < bootstrap_arguments.length; i++) { |
| bootstrap_arguments[i] = input.readUnsignedShort(); |
| } |
| } |
| |
| // helper method |
| private BootstrapMethod(final int bootstrap_method_ref, final int num_bootstrap_arguments) { |
| this(bootstrap_method_ref, new int[num_bootstrap_arguments]); |
| } |
| |
| /** |
| * @param bootstrap_method_ref int index into constant_pool of CONSTANT_MethodHandle |
| * @param bootstrap_arguments int[] indices into constant_pool of CONSTANT_<type>_info |
| */ |
| public BootstrapMethod(final int bootstrap_method_ref, final int[] bootstrap_arguments) { |
| this.bootstrap_method_ref = bootstrap_method_ref; |
| this.bootstrap_arguments = bootstrap_arguments; |
| } |
| |
| /** |
| * @return index into constant_pool of bootstrap_method |
| */ |
| public int getBootstrapMethodRef() { |
| return bootstrap_method_ref; |
| } |
| |
| /** |
| * @param bootstrap_method_ref int index into constant_pool of CONSTANT_MethodHandle |
| */ |
| public void setBootstrapMethodRef(final int bootstrap_method_ref) { |
| this.bootstrap_method_ref = bootstrap_method_ref; |
| } |
| |
| /** |
| * @return int[] of bootstrap_method indices into constant_pool of CONSTANT_<type>_info |
| */ |
| public int[] getBootstrapArguments() { |
| return bootstrap_arguments; |
| } |
| |
| /** |
| * @return count of number of boostrap arguments |
| */ |
| public int getNumBootstrapArguments() { |
| return bootstrap_arguments.length; |
| } |
| |
| /** |
| * @param bootstrap_arguments int[] indices into constant_pool of CONSTANT_<type>_info |
| */ |
| public void setBootstrapArguments(final int[] bootstrap_arguments) { |
| this.bootstrap_arguments = bootstrap_arguments; |
| } |
| |
| /** |
| * @return String representation. |
| */ |
| @Override |
| public final String toString() { |
| return "BootstrapMethod(" + bootstrap_method_ref + ", " + bootstrap_arguments.length + ", " |
| + Arrays.toString(bootstrap_arguments) + ")"; |
| } |
| |
| /** |
| * @return Resolved string representation |
| */ |
| public final String toString( final ConstantPool constant_pool ) { |
| final StringBuilder buf = new StringBuilder(); |
| String bootstrap_method_name; |
| bootstrap_method_name = constant_pool.constantToString(bootstrap_method_ref, |
| Const.CONSTANT_MethodHandle); |
| buf.append(Utility.compactClassName(bootstrap_method_name)); |
| final int num_bootstrap_arguments = bootstrap_arguments.length; |
| if (num_bootstrap_arguments > 0) { |
| buf.append("\n Method Arguments:"); |
| for (int i = 0; i < num_bootstrap_arguments; i++) { |
| buf.append("\n ").append(i).append(": "); |
| buf.append(constant_pool.constantToString(constant_pool.getConstant(bootstrap_arguments[i]))); |
| } |
| } |
| return buf.toString(); |
| } |
| |
| /** |
| * Dump object to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| public final void dump(final DataOutputStream file) throws IOException { |
| file.writeShort(bootstrap_method_ref); |
| file.writeShort(bootstrap_arguments.length); |
| for (final int bootstrap_argument : bootstrap_arguments) { |
| file.writeShort(bootstrap_argument); |
| } |
| } |
| |
| /** |
| * @return deep copy of this object |
| */ |
| public BootstrapMethod copy() { |
| try { |
| return (BootstrapMethod) clone(); |
| } catch (final CloneNotSupportedException e) { |
| // TODO should this throw? |
| } |
| return null; |
| } |
| } |