aoqi@0: /*
aoqi@0:  * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.tools.classfile;
aoqi@0: 
aoqi@0: import java.io.IOException;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * See JVMS 4.7.21
bpatel@2628:  * https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.21
aoqi@0:  *
aoqi@0:  *  <p><b>This is NOT part of any supported API.
aoqi@0:  *  If you write code that depends on this, you do so at your own risk.
aoqi@0:  *  This code and its internal interfaces are subject to change or
aoqi@0:  *  deletion without notice.</b>
aoqi@0:  */
aoqi@0: public class BootstrapMethods_attribute extends Attribute {
aoqi@0:     public final BootstrapMethodSpecifier[] bootstrap_method_specifiers;
aoqi@0: 
aoqi@0:     BootstrapMethods_attribute(ClassReader cr, int name_index, int length)
aoqi@0:             throws IOException, AttributeException {
aoqi@0:         super(name_index, length);
aoqi@0:         int bootstrap_method_count = cr.readUnsignedShort();
aoqi@0:         bootstrap_method_specifiers = new BootstrapMethodSpecifier[bootstrap_method_count];
aoqi@0:         for (int i = 0; i < bootstrap_method_specifiers.length; i++)
aoqi@0:             bootstrap_method_specifiers[i] = new BootstrapMethodSpecifier(cr);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public  BootstrapMethods_attribute(int name_index, BootstrapMethodSpecifier[] bootstrap_method_specifiers) {
aoqi@0:         super(name_index, length(bootstrap_method_specifiers));
aoqi@0:         this.bootstrap_method_specifiers = bootstrap_method_specifiers;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static int length(BootstrapMethodSpecifier[] bootstrap_method_specifiers) {
aoqi@0:         int n = 2;
aoqi@0:         for (BootstrapMethodSpecifier b : bootstrap_method_specifiers)
aoqi@0:             n += b.length();
aoqi@0:         return n;
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public <R, P> R accept(Visitor<R, P> visitor, P p) {
aoqi@0:         return visitor.visitBootstrapMethods(this, p);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static class BootstrapMethodSpecifier {
aoqi@0:         public int bootstrap_method_ref;
aoqi@0:         public int[] bootstrap_arguments;
aoqi@0: 
aoqi@0:         public BootstrapMethodSpecifier(int bootstrap_method_ref, int[] bootstrap_arguments) {
aoqi@0:             this.bootstrap_method_ref = bootstrap_method_ref;
aoqi@0:             this.bootstrap_arguments = bootstrap_arguments;
aoqi@0:         }
aoqi@0:         BootstrapMethodSpecifier(ClassReader cr) throws IOException {
aoqi@0:             bootstrap_method_ref = cr.readUnsignedShort();
aoqi@0:             int method_count = cr.readUnsignedShort();
aoqi@0:             bootstrap_arguments = new int[method_count];
aoqi@0:             for (int i = 0; i < bootstrap_arguments.length; i++) {
aoqi@0:                 bootstrap_arguments[i] = cr.readUnsignedShort();
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         int length() {
aoqi@0:             // u2 (method_ref) + u2 (argc) + u2 * argc
aoqi@0:             return 2 + 2 + (bootstrap_arguments.length * 2);
aoqi@0:         }
aoqi@0:     }
aoqi@0: }