Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2001-2014,  Wolfgang M. Meier (meier@ifs.tu-darmstadt.de)
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This library 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 Library General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 *  $Id:
 */

import java.io.ByteArrayOutputStream;

public class Main {
    public static final String getXMLDecl(final byte[] data) {
        boolean foundTag = false;
        for (int i = 0; i < data.length && !foundTag; i++) {
            if (data[i] == '<') {
                foundTag = true;

                /*
                 * Need to gather the next 4 non-zero values and test them
                 * because greater than 8-bytes character encodings will be
                 * represented with two bits
                 */
                boolean foundQuestionMark = false;
                int placeInDeclString = 0;
                final byte[] declString = new byte[4];
                int x = (i + 1);
                for (; x < data.length; x++) {

                    if (data[x] == 0) {
                        continue;
                    }

                    if (!foundQuestionMark && data[x] != '?') {
                        break;
                    } else {
                        foundQuestionMark = true;
                    }

                    declString[placeInDeclString] = data[x];
                    placeInDeclString++;

                    if (placeInDeclString >= 4) {
                        break;
                    }
                }

                if (placeInDeclString == 4 && declString[0] == '?' && declString[1] == 'x' && declString[2] == 'm'
                        && declString[3] == 'l')

                {

                    final ByteArrayOutputStream out = new ByteArrayOutputStream(150);

                    out.write('<');
                    out.write(declString, 0, 4);

                    for (int j = (x + 1); j < data.length; j++) {
                        if (data[j] != 0) {
                            out.write(data[j]);
                        }

                        if (data[j] == '?') {
                            j++;
                            /*
                             * When we find this we have to start looking for the end tag
                             */
                            for (; j < data.length; j++) {
                                if (data[j] == 0) {
                                    continue;
                                }

                                out.write(data[j]);

                                if (data[j] != '>') {
                                    break;
                                }

                                return new String(out.toByteArray());
                            }

                        }
                    }
                }
            }
        }
        return null;
    }
}