JDK14/Java14源码在线阅读

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 * Licensed to the Apache Software Foundation (ASF) under one or more
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package com.sun.org.apache.bcel.internal.classfile;

/**
 * Unknown (non-standard) attributes may be read via user-defined factory
 * objects that can be registered with the Attribute.addAttributeReader
 * method. These factory objects should implement this interface.
 *
 * @see Attribute
 * @version $Id$
 * @since 6.0
 */
public interface UnknownAttributeReader {

    /**
     * When this attribute reader is added via the static method Attribute.addAttributeReader,
     * an attribute name is associated with it. As the class file parser parses attributes,
     * it will call various AttributeReaders based on the name of the attributes it is constructing.
     *
     * @param name_index    An index into the constant pool, indexing a ConstantUtf8
     *                      that represents the name of the attribute.
     * @param length        The length of the data contained in the attribute. This is written
     *                      into the constant pool and should agree with what the factory expects the length to be.
     * @param file          This is the data input that the factory needs to read its data from.
     * @param constant_pool This is the constant pool associated with the Attribute that we are constructing.
     *
     * @return The user-defined AttributeReader should take this data and use
     * it to construct an attribute.  In the case of errors, a null can be

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