/* 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
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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*/
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;
}
}