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HSQLDB example source code file (RowInputTextQuoted.java)

This example HSQLDB source code file (RowInputTextQuoted.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - HSQLDB tags/keywords

exception, found_quote, found_quote, io, ioexception, need_end_quote, need_end_quote, normal_field, normal_field, object, rowinputtext, rowinputtextquoted, string, string, stringbuffer

The HSQLDB RowInputTextQuoted.java source code

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.rowio;

import java.io.IOException;

import org.hsqldb.Trace;

/**
 * Fields in the source file need not be quoted. Methods in this class unquote
 * the fields if they are quoted and handle quote character doubling in this
 * case.
 *
 * @author sqlbob@users (RMP)
 * @version 1.7.2
 * @since 1.7.0
 */
public class RowInputTextQuoted extends RowInputText {

    private static final int NORMAL_FIELD   = 0;
    private static final int NEED_END_QUOTE = 1;
    private static final int FOUND_QUOTE    = 2;
    private char[]           qtext;

    public RowInputTextQuoted(String fieldSep, String varSep,
                              String longvarSep, boolean allQuoted) {
        super(fieldSep, varSep, longvarSep, allQuoted);
    }

    public void setSource(String text, int pos, int byteSize) {

        super.setSource(text, pos, byteSize);

        qtext = text.toCharArray();
    }

    protected String getField(String sep, int sepLen,
                              boolean isEnd) throws IOException {

        //fredt - now the only supported behaviour is emptyIsNull
        String s = null;

        if (next >= qtext.length || qtext[next] != '\"') {
            return (super.getField(sep, sepLen, isEnd));
        }

        try {
            field++;

            StringBuffer ret   = new StringBuffer();
            boolean      done  = false;
            int          state = NORMAL_FIELD;
            int          end   = -1;

            if (!isEnd) {
                end = text.indexOf(sep, next);
            }

            for (; next < qtext.length; next++) {
                switch (state) {

                    case NORMAL_FIELD :
                    default :
                        if (next == end) {
                            next += sepLen;
                            done = true;
                        } else if (qtext[next] == '\"') {

                            //-- Beginning of field
                            state = NEED_END_QUOTE;
                        } else {
                            ret.append(qtext[next]);
                        }
                        break;

                    case NEED_END_QUOTE :
                        if (qtext[next] == '\"') {
                            state = FOUND_QUOTE;
                        } else {
                            ret.append(qtext[next]);
                        }
                        break;

                    case FOUND_QUOTE :
                        if (qtext[next] == '\"') {

                            //-- Escaped quote
                            ret.append(qtext[next]);

                            state = NEED_END_QUOTE;
                        } else {
                            next  += sepLen - 1;
                            state = NORMAL_FIELD;

                            if (!isEnd) {
                                next++;

                                done = true;
                            }
                        }
                        break;
                }

                if (done) {
                    break;
                }
            }

            s = ret.toString();
        } catch (Exception e) {
            throw new IOException(
                Trace.getMessage(
                    Trace.QuotedTextDatabaseRowInput_getField2, true,
                    new Object[] {
                new Integer(field), e.toString()
            }));
        }

        return s;
    }
}

Other HSQLDB examples (source code examples)

Here is a short list of links related to this HSQLDB RowInputTextQuoted.java source code file:

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