ksrini@826: /*
jjg@1358:  * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
ksrini@826:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ksrini@826:  *
ksrini@826:  * This code is free software; you can redistribute it and/or modify it
ksrini@826:  * under the terms of the GNU General Public License version 2 only, as
ksrini@826:  * published by the Free Software Foundation.  Oracle designates this
ksrini@826:  * particular file as subject to the "Classpath" exception as provided
ksrini@826:  * by Oracle in the LICENSE file that accompanied this code.
ksrini@826:  *
ksrini@826:  * This code is distributed in the hope that it will be useful, but WITHOUT
ksrini@826:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ksrini@826:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ksrini@826:  * version 2 for more details (a copy is included in the LICENSE file that
ksrini@826:  * accompanied this code).
ksrini@826:  *
ksrini@826:  * You should have received a copy of the GNU General Public License version
ksrini@826:  * 2 along with this work; if not, write to the Free Software Foundation,
ksrini@826:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ksrini@826:  *
ksrini@826:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ksrini@826:  * or visit www.oracle.com if you need additional information or have any
ksrini@826:  * questions.
ksrini@826:  */
ksrini@826: 
ksrini@826: package com.sun.tools.classfile;
ksrini@826: 
ksrini@826: import java.io.IOException;
ksrini@826: 
ksrini@826: /**
jjg@1358:  * See JVMS 4.7.21
jjg@1358:  * http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.21
ksrini@826:  *
ksrini@826:  *  <p><b>This is NOT part of any supported API.
ksrini@826:  *  If you write code that depends on this, you do so at your own risk.
ksrini@826:  *  This code and its internal interfaces are subject to change or
ksrini@826:  *  deletion without notice.</b>
ksrini@826:  */
ksrini@826: public class BootstrapMethods_attribute extends Attribute {
ksrini@826:     public final BootstrapMethodSpecifier[] bootstrap_method_specifiers;
ksrini@826: 
ksrini@826:     BootstrapMethods_attribute(ClassReader cr, int name_index, int length)
ksrini@826:             throws IOException, AttributeException {
ksrini@826:         super(name_index, length);
ksrini@826:         int bootstrap_method_count = cr.readUnsignedShort();
ksrini@826:         bootstrap_method_specifiers = new BootstrapMethodSpecifier[bootstrap_method_count];
ksrini@826:         for (int i = 0; i < bootstrap_method_specifiers.length; i++)
ksrini@826:             bootstrap_method_specifiers[i] = new BootstrapMethodSpecifier(cr);
ksrini@826:     }
ksrini@826: 
ksrini@826:     public  BootstrapMethods_attribute(int name_index, BootstrapMethodSpecifier[] bootstrap_method_specifiers) {
ksrini@826:         super(name_index, length(bootstrap_method_specifiers));
ksrini@826:         this.bootstrap_method_specifiers = bootstrap_method_specifiers;
ksrini@826:     }
ksrini@826: 
ksrini@826:     public static int length(BootstrapMethodSpecifier[] bootstrap_method_specifiers) {
ksrini@826:         int n = 2;
ksrini@826:         for (BootstrapMethodSpecifier b : bootstrap_method_specifiers)
ksrini@826:             n += b.length();
ksrini@826:         return n;
ksrini@826:     }
ksrini@826: 
ksrini@826:     @Override
ksrini@826:     public <R, P> R accept(Visitor<R, P> visitor, P p) {
ksrini@826:         return visitor.visitBootstrapMethods(this, p);
ksrini@826:     }
ksrini@826: 
ksrini@826:     public static class BootstrapMethodSpecifier {
ksrini@826:         public int bootstrap_method_ref;
ksrini@826:         public int[] bootstrap_arguments;
ksrini@826: 
ksrini@826:         public BootstrapMethodSpecifier(int bootstrap_method_ref, int[] bootstrap_arguments) {
ksrini@826:             this.bootstrap_method_ref = bootstrap_method_ref;
ksrini@826:             this.bootstrap_arguments = bootstrap_arguments;
ksrini@826:         }
ksrini@826:         BootstrapMethodSpecifier(ClassReader cr) throws IOException {
ksrini@826:             bootstrap_method_ref = cr.readUnsignedShort();
ksrini@826:             int method_count = cr.readUnsignedShort();
ksrini@826:             bootstrap_arguments = new int[method_count];
ksrini@826:             for (int i = 0; i < bootstrap_arguments.length; i++) {
ksrini@826:                 bootstrap_arguments[i] = cr.readUnsignedShort();
ksrini@826:             }
ksrini@826:         }
ksrini@826: 
ksrini@826:         int length() {
ksrini@826:             // u2 (method_ref) + u2 (argc) + u2 * argc
ksrini@826:             return 2 + 2 + (bootstrap_arguments.length * 2);
ksrini@826:         }
ksrini@826:     }
ksrini@826: }