| /* |
| * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.classfile; |
| |
| import java.io.IOException; |
| |
| /** |
| * See JVMS 4.7.21 |
| * http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.21 |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class BootstrapMethods_attribute extends Attribute { |
| public final BootstrapMethodSpecifier[] bootstrap_method_specifiers; |
| |
| BootstrapMethods_attribute(ClassReader cr, int name_index, int length) |
| throws IOException, AttributeException { |
| super(name_index, length); |
| int bootstrap_method_count = cr.readUnsignedShort(); |
| bootstrap_method_specifiers = new BootstrapMethodSpecifier[bootstrap_method_count]; |
| for (int i = 0; i < bootstrap_method_specifiers.length; i++) |
| bootstrap_method_specifiers[i] = new BootstrapMethodSpecifier(cr); |
| } |
| |
| public BootstrapMethods_attribute(int name_index, BootstrapMethodSpecifier[] bootstrap_method_specifiers) { |
| super(name_index, length(bootstrap_method_specifiers)); |
| this.bootstrap_method_specifiers = bootstrap_method_specifiers; |
| } |
| |
| public static int length(BootstrapMethodSpecifier[] bootstrap_method_specifiers) { |
| int n = 2; |
| for (BootstrapMethodSpecifier b : bootstrap_method_specifiers) |
| n += b.length(); |
| return n; |
| } |
| |
| @Override |
| public <R, P> R accept(Visitor<R, P> visitor, P p) { |
| return visitor.visitBootstrapMethods(this, p); |
| } |
| |
| public static class BootstrapMethodSpecifier { |
| public int bootstrap_method_ref; |
| public int[] bootstrap_arguments; |
| |
| public BootstrapMethodSpecifier(int bootstrap_method_ref, int[] bootstrap_arguments) { |
| this.bootstrap_method_ref = bootstrap_method_ref; |
| this.bootstrap_arguments = bootstrap_arguments; |
| } |
| BootstrapMethodSpecifier(ClassReader cr) throws IOException { |
| bootstrap_method_ref = cr.readUnsignedShort(); |
| int method_count = cr.readUnsignedShort(); |
| bootstrap_arguments = new int[method_count]; |
| for (int i = 0; i < bootstrap_arguments.length; i++) { |
| bootstrap_arguments[i] = cr.readUnsignedShort(); |
| } |
| } |
| |
| int length() { |
| // u2 (method_ref) + u2 (argc) + u2 * argc |
| return 2 + 2 + (bootstrap_arguments.length * 2); |
| } |
| } |
| } |