jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/classfile/ClassReader.java@bc456436c613

8008077: update reference impl for type-annotations
Reviewed-by: jjg
Contributed-by: wmdietl@cs.washington.edu

     1 /*

     2  * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.tools.classfile;

    28 import java.io.BufferedInputStream;

    29 import java.io.ByteArrayInputStream;

    30 import java.io.DataInputStream;

    31 import java.io.IOException;

    32 import java.io.InputStream;

    34 /**

    35  *  <p><b>This is NOT part of any supported API.

    36  *  If you write code that depends on this, you do so at your own risk.

    37  *  This code and its internal interfaces are subject to change or

    38  *  deletion without notice.</b>

    39  */

    40 public class ClassReader {

    41     ClassReader(ClassFile classFile, InputStream in, Attribute.Factory attributeFactory) throws IOException {

    42         // null checks

    43         classFile.getClass();

    44         attributeFactory.getClass();

    46         this.classFile = classFile;

    47         this.in = new DataInputStream(new BufferedInputStream(in));

    48         this.attributeFactory = attributeFactory;

    49     }

    51     ClassFile getClassFile() {

    52         return classFile;

    53     }

    55     ConstantPool getConstantPool() {

    56         return classFile.constant_pool;

    57     }

    59     public Attribute readAttribute() throws IOException {

    60         int name_index = readUnsignedShort();

    61         int length = readInt();

    62         byte[] data = new byte[length];

    63         readFully(data);

    65         DataInputStream prev = in;

    66         in = new DataInputStream(new ByteArrayInputStream(data));

    67         try {

    68             return attributeFactory.createAttribute(this, name_index, data);

    69         } finally {

    70             in = prev;

    71         }

    72     }

    74     public void readFully(byte[] b) throws IOException {

    75         in.readFully(b);

    76     }

    78     public int readUnsignedByte() throws IOException {

    79         return in.readUnsignedByte();

    80     }

    82     public int readUnsignedShort() throws IOException {

    83         return in.readUnsignedShort();

    84     }

    86     public int readInt() throws IOException {

    87         return in.readInt();

    88     }

    90     public long readLong() throws IOException {

    91         return in.readLong();

    92     }

    94     public float readFloat() throws IOException {

    95         return in.readFloat();

    96     }

    98     public double readDouble() throws IOException {

    99         return in.readDouble();

   100     }

   102     public String readUTF() throws IOException {

   103         return in.readUTF();

   104     }

   106     private DataInputStream in;

   107     private ClassFile classFile;

   108     private Attribute.Factory attributeFactory;

   109 }

Mercurial > jdk8-mips64-public > langtools / file revision