88 lines · 2.5 KB · Java
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/* * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.reflect; class ByteVectorImpl implements ByteVector {    private byte[] data;    private int pos;     public ByteVectorImpl() {        this(100);    }     public ByteVectorImpl(int sz) {        data = new byte[sz];        pos = -1;    }     public int getLength() {        return pos + 1;    }     public byte get(int index) {        if (index >= data.length) {            resize(index);            pos = index;        }        return data[index];    }     public void put(int index, byte value) {        if (index >= data.length) {            resize(index);            pos = index;        }        data[index] = value;    }     public void add(byte value) {        if (++pos >= data.length) {            resize(pos);        }        data[pos] = value;    }     public void trim() {        if (pos != data.length - 1) {            byte[] newData = new byte[pos + 1];            System.arraycopy(data, 0, newData, 0, pos + 1);            data = newData;        }    }     public byte[] getData() {        return data;    }     private void resize(int minSize) {        if (minSize <= 2 * data.length) {            minSize = 2 * data.length;        }        byte[] newData = new byte[minSize];        System.arraycopy(data, 0, newData, 0, data.length);        data = newData;    }}