116 lines
4.4 KiB
Java
116 lines
4.4 KiB
Java
/**
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000,2002,2003 INRIA, France Telecom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Contact: Eric.Bruneton@rd.francetelecom.com
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*
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* Author: Eric Bruneton
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*/
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package org.objectweb.asm.attrs;
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import java.util.Map;
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import org.objectweb.asm.Attribute;
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import org.objectweb.asm.ByteVector;
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import org.objectweb.asm.ClassReader;
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import org.objectweb.asm.ClassWriter;
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import org.objectweb.asm.Label;
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/**
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* The EnclosingMethod attribute is an optional fixed-length attribute
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* in the attributes table of the ClassFile structure. A class must
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* have an EnclosingMethod attribute if and only if it is a local
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* class or an anonymous class. A class may have no more than one
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* EnclosingMethod attribute.
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* <p>
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* The EnclosingMethod attribute has the following format:
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* <pre>
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* EnclosingMethod_attribute {
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* u2 attribute_name;
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* u4 attribute_length;
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* u2 method_descriptor_index;
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* }
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* </pre>
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* The items of the EnclosingMethod_attribute structure are as follows:
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* <dl>
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* <dt>attribute_name_index</dt>
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* <dd>The value of the attribute_name_index item must be a valid index
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* into the constant_pool table. The constant_pool entry at that index
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* must be a CONSTANT_Utf8_info structure representing the string
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* "EnclosingMethod".</dd>
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* <dt>attribute_length</dt>
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* <dd>The value of the attribute_length item is zero.</dd>
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* <dt>method_descriptor_index</dt>
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* <dd>The value of the method_descriptor_index item must be a valid
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* index into the constant_pool table. The constant_pool entry at that
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* index must be a CONSTANT_Utf8_info structure representing a valid
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* method descriptor (JLS 4.4.3). It is the responsibility of the
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* Java compiler to ensure that the method identified via the
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* method_descriptor_index is indeed the closest lexically enclosing
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* method of the class that contains this EnclosingMethod attribute.</dd>
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* </dl>
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*
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* @author Eugene Kuleshov
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*/
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public class EnclosingMethodAttribute extends Attribute implements Dumpable {
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public String methodDescriptor;
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public EnclosingMethodAttribute () {
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super("EnclosingMethod");
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}
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public EnclosingMethodAttribute (String methodDescriptor) {
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this();
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this.methodDescriptor = methodDescriptor;
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}
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protected Attribute read (ClassReader cr, int off,
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int len, char[] buf, int codeOff, Label[] labels) {
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return new EnclosingMethodAttribute(cr.readUTF8(off, buf));
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}
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protected ByteVector write (ClassWriter cw, byte[] code,
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int len, int maxStack, int maxLocals) {
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return new ByteVector().putShort(cw.newUTF8(methodDescriptor));
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}
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public void dump (StringBuffer buf, String varName, Map labelNames) {
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buf.append("EnclosingMethodAttribute ").append(varName)
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.append(" = new EnclosingMethodAttribute(\"")
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.append(methodDescriptor).append("\");\n");
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}
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public String toString () {
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return methodDescriptor;
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}
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}
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