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HSQLDB example source code file (RowInputText.java)

This example HSQLDB source code file (RowInputText.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

bigdecimal, date, hsqlexception, hsqlexception, integer, integer, io, ioexception, ioexception, jdbc, math, object, rowinputbase, rowinputtext, sql, string, string, true

The HSQLDB RowInputText.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 java.math.BigDecimal;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;

import org.hsqldb.Column;
import org.hsqldb.HsqlDateTime;
import org.hsqldb.HsqlException;
import org.hsqldb.Trace;
import org.hsqldb.Types;
import org.hsqldb.types.Binary;
import org.hsqldb.types.JavaObject;

/**
 *  Class for reading the data for a database row in text table format.
 *
 * @author sqlbob@users (RMP)
 * @version 1.8.0
 * @since 1.7.0
 */
public class RowInputText extends RowInputBase implements RowInputInterface {

    // text table specific
    private String    fieldSep;
    private String    varSep;
    private String    longvarSep;
    private int       fieldSepLen;
    private int       varSepLen;
    private int       longvarSepLen;
    private boolean   fieldSepEnd;
    private boolean   varSepEnd;
    private boolean   longvarSepEnd;
    private int       textLen;
    protected String  text;
    protected int     line;
    protected int     field;
    protected int     next = 0;
    protected boolean allQuoted;

    /**
     * fredt@users - comment - in future may use a custom subclasse of
     * InputStream to read the data.
     *
     * author: sqlbob@users (RMP)
     */
    public RowInputText(String fieldSep, String varSep, String longvarSep,
                        boolean allQuoted) {

        super(new byte[0]);

        //-- Newline indicates that field should match to end of line.
        if (fieldSep.endsWith("\n")) {
            fieldSepEnd = true;
            fieldSep    = fieldSep.substring(0, fieldSep.length() - 1);
        }

        if (varSep.endsWith("\n")) {
            varSepEnd = true;
            varSep    = varSep.substring(0, varSep.length() - 1);
        }

        if (longvarSep.endsWith("\n")) {
            longvarSepEnd = true;
            longvarSep    = longvarSep.substring(0, longvarSep.length() - 1);
        }

        this.allQuoted  = allQuoted;
        this.fieldSep   = fieldSep;
        this.varSep     = varSep;
        this.longvarSep = longvarSep;
        fieldSepLen     = fieldSep.length();
        varSepLen       = varSep.length();
        longvarSepLen   = longvarSep.length();
    }

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

        size      = byteSize;
        this.text = text;
        textLen   = text.length();
        filePos   = pos;
        next      = 0;

        line++;

        field = 0;
    }

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

        String s = null;

        try {
            int start = next;

            field++;

            if (isEnd) {
                if ((next >= textLen) && (sepLen > 0)) {
                    throw Trace.error(Trace.TextDatabaseRowInput_getField);
                } else if (text.endsWith(sep)) {
                    next = textLen - sepLen;
                } else {
                    throw Trace.error(Trace.TextDatabaseRowInput_getField2);
                }
            } else {
                next = text.indexOf(sep, start);

                if (next == -1) {
                    next = textLen;
                }
            }

            if (start > next) {
                start = next;
            }

            s    = text.substring(start, next);
            next += sepLen;
            s    = s.trim();

            if (s.length() == 0) {
                s = null;
            }
        } catch (Exception e) {
            throw new IOException(
                Trace.getMessage(
                    Trace.TextDatabaseRowInput_getField3, true, new Object[] {
                new Integer(field), e.toString()
            }));
        }

        return s;
    }

    public String readString() throws IOException {
        return getField(fieldSep, fieldSepLen, fieldSepEnd);
    }

    private String readVarString() throws IOException {
        return getField(varSep, varSepLen, varSepEnd);
    }

    private String readLongVarString() throws IOException {
        return getField(longvarSep, longvarSepLen, longvarSepEnd);
    }

    public short readShortData() throws IOException {
        return (short) readIntData();
    }

    public int readIntData() throws IOException {

        String s = readString();

        if (s == null) {
            return 0;
        }

        s = s.trim();

        if (s.length() == 0) {
            return 0;
        }

        return Integer.parseInt(s);
    }

    public long readLongData() throws IOException {
        throw Trace.runtimeError(Trace.UNSUPPORTED_INTERNAL_OPERATION,
                                 "RowInputText");
    }

    public int readType() throws IOException {
        return 0;
    }

    protected boolean checkNull() {

        // Return null on each column read instead.
        return false;
    }

    protected String readChar(int type) throws IOException {

        switch (type) {

            case Types.CHAR :
                return readString();

            case Types.VARCHAR :
            case Types.VARCHAR_IGNORECASE :
                return readVarString();

            case Types.LONGVARCHAR :
            default :
                return readLongVarString();
        }
    }

    protected Integer readSmallint() throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return Integer.valueOf(s);
    }

    protected Integer readInteger() throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return Integer.valueOf(s);
    }

    protected Long readBigint() throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return Long.valueOf(s);
    }

    protected Double readReal(int type) throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return Double.valueOf(s);
    }

    protected BigDecimal readDecimal() throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return new BigDecimal(s);
    }

    protected Time readTime() throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return HsqlDateTime.timeValue(s);
    }

    protected Date readDate() throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return HsqlDateTime.dateValue(s);
    }

    protected Timestamp readTimestamp() throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return HsqlDateTime.timestampValue(s);
    }

    protected Boolean readBit() throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return s.equalsIgnoreCase("TRUE") ? Boolean.TRUE
                                          : Boolean.FALSE;
    }

    protected Object readOther() throws IOException, HsqlException {

        byte[] data;
        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        data = Column.hexToByteArray(s);

        return new JavaObject(data);
    }

    protected Binary readBinary(int type) throws IOException, HsqlException {

        String s = readString();

        if (s == null) {
            return null;
        }

        s = s.trim();

        if (s.length() == 0) {
            return null;
        }

        return new Binary(Column.hexToByteArray(s), false);
    }

    public int getLineNumber() {
        return line;
    }

    public void skippedLine() {
        line++;
    }

    public void reset() {

        text    = "";
        textLen = 0;
        filePos = 0;
        next    = 0;
        field   = 0;
        line    = 0;
    }
}

Other HSQLDB examples (source code examples)

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