/*
* 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
*/
/**代码未完, 请加载全部代码(NowJava.com).**/