org.firebirdsql.jdbc.field.FBStringField Maven / Gradle / Ivy
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/*
* Firebird Open Source JavaEE Connector - JDBC Driver
*
* Distributable under LGPL license.
* You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
*
* This program 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
* LGPL License for more details.
*
* This file was created by members of the firebird development team.
* All individual contributions remain the Copyright (C) of those
* individuals. Contributors to this file are either listed here or
* can be obtained from a source control history command.
*
* All rights reserved.
*/
package org.firebirdsql.jdbc.field;
import org.firebirdsql.encodings.EncodingDefinition;
import org.firebirdsql.gds.ISCConstants;
import org.firebirdsql.gds.ng.fields.FieldDescriptor;
import org.firebirdsql.jdbc.FBDriverNotCapableException;
import org.firebirdsql.util.IOUtils;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.*;
import java.util.Calendar;
/**
* Describe class FBStringField here.
*
* @author Roman Rokytskyy
* @author David Jencks
* @author Mark Rotteveel
* @version 1.0
* @todo implement data handling code
* @todo implement correct exception throwing in all setXXX methods that use
* setString(String), currently it will raise an exception with string conversion
* error message, instead it should complain about error coresponding to the XXX.
* @todo think about the right setBoolean and getBoolean (currently it is "Y"
* and "N", or "TRUE" and "FALSE").
*
* TODO check if the setBinaryStream(null) is allowed by specs.
*/
class FBStringField extends FBField {
static final String SHORT_TRUE = "Y";
static final String SHORT_FALSE = "N";
static final String LONG_TRUE = "true";
static final String LONG_FALSE = "false";
static final String SHORT_TRUE_2 = "T";
static final String SHORT_TRUE_3 = "1";
protected final int possibleCharLength;
protected final EncodingDefinition encodingDefinition;
FBStringField(FieldDescriptor fieldDescriptor, FieldDataProvider dataProvider, int requiredType)
throws SQLException {
super(fieldDescriptor, dataProvider, requiredType);
encodingDefinition = getEncodingDefinition(fieldDescriptor);
// TODO This might wreak havoc if field is a FBLongVarcharField
possibleCharLength = fieldDescriptor.getLength() / encodingDefinition.getMaxBytesPerChar();
}
protected static EncodingDefinition getEncodingDefinition(FieldDescriptor fieldDescriptor) throws SQLException {
// Note: characterSetId includes the collation id
final int characterSetId;
switch (fieldDescriptor.getType() & ~1) {
case ISCConstants.SQL_TEXT:
case ISCConstants.SQL_VARYING:
characterSetId = fieldDescriptor.getSubType();
break;
case ISCConstants.SQL_BLOB:
if (fieldDescriptor.getSubType() == 1) {
characterSetId = fieldDescriptor.getScale();
} else {
characterSetId = ISCConstants.CS_NONE;
}
break;
default:
throw new SQLException("Unexpected Firebird data type: " + fieldDescriptor);
}
return fieldDescriptor.getDatatypeCoder().getEncodingFactory()
.getEncodingDefinitionByCharacterSetId(characterSetId);
}
//----- Math code
@Override
public byte getByte() throws SQLException {
if (isNull()) return BYTE_NULL_VALUE;
try {
return Byte.parseByte(getString().trim());
} catch (NumberFormatException nfex) {
throw new TypeConversionException(BYTE_CONVERSION_ERROR + " " + getString().trim());
}
}
@Override
public short getShort() throws SQLException {
if (isNull()) return SHORT_NULL_VALUE;
try {
return Short.parseShort(getString().trim());
} catch (NumberFormatException nfex) {
throw new TypeConversionException(SHORT_CONVERSION_ERROR + " " + getString().trim());
}
}
@Override
public int getInt() throws SQLException {
if (isNull()) return INT_NULL_VALUE;
try {
return Integer.parseInt(getString().trim());
} catch (NumberFormatException nfex) {
throw new TypeConversionException(INT_CONVERSION_ERROR + " " + getString().trim());
}
}
@Override
public long getLong() throws SQLException {
if (isNull()) return LONG_NULL_VALUE;
try {
return Long.parseLong(getString().trim());
} catch (NumberFormatException nfex) {
throw new TypeConversionException(LONG_CONVERSION_ERROR + " " + getString().trim());
}
}
@Override
public BigDecimal getBigDecimal() throws SQLException {
if (isNull()) return null;
try {
return new BigDecimal(getString().trim());
} catch (NumberFormatException e) {
throw new TypeConversionException(BIGDECIMAL_CONVERSION_ERROR + " " + getString().trim());
}
}
@Override
public float getFloat() throws SQLException {
if (isNull()) return FLOAT_NULL_VALUE;
try {
return Float.parseFloat(getString().trim());
} catch (NumberFormatException nfex) {
throw new TypeConversionException(FLOAT_CONVERSION_ERROR + " " + getString().trim());
}
}
@Override
public double getDouble() throws SQLException {
if (isNull()) return DOUBLE_NULL_VALUE;
try {
return Double.parseDouble(getString().trim());
} catch (NumberFormatException nfex) {
throw new TypeConversionException(DOUBLE_CONVERSION_ERROR + " " + getString().trim());
}
}
//----- getBoolean, getString and getObject code
@Override
public boolean getBoolean() throws SQLException {
if (isNull()) return BOOLEAN_NULL_VALUE;
final String trimmedValue = getString().trim();
return trimmedValue.equalsIgnoreCase(LONG_TRUE) ||
trimmedValue.equalsIgnoreCase(SHORT_TRUE) ||
trimmedValue.equalsIgnoreCase(SHORT_TRUE_2) ||
trimmedValue.equalsIgnoreCase(SHORT_TRUE_3);
}
@Override
public String getString() throws SQLException {
if (isNull()) return null;
return getDatatypeCoder().decodeString(getFieldData(), encodingDefinition.getEncoding(), mappingPath);
}
//----- getXXXStream code
@Override
public InputStream getBinaryStream() throws SQLException {
if (isNull()) return null;
return new ByteArrayInputStream(getFieldData());
}
@Override
public byte[] getBytes() throws SQLException {
if (isNull()) return null;
// protect against unintentional modification of cached or shared byte-arrays (eg in DatabaseMetaData)
return getFieldData().clone();
}
//----- getDate, getTime and getTimestamp code
@Override
public Date getDate(Calendar cal) throws SQLException {
if (isNull()) return null;
return getDatatypeCoder().decodeDate(getDate(), cal);
}
@Override
public Date getDate() throws SQLException {
if (isNull()) return null;
return Date.valueOf(getString().trim());
}
@Override
public Time getTime(Calendar cal) throws SQLException {
if (isNull()) return null;
return getDatatypeCoder().decodeTime(getTime(), cal, isInvertTimeZone());
}
@Override
public Time getTime() throws SQLException {
if (isNull()) return null;
return Time.valueOf(getString().trim());
}
@Override
public Timestamp getTimestamp(Calendar cal) throws SQLException {
if (isNull()) return null;
return getDatatypeCoder().decodeTimestamp(getTimestamp(), cal, isInvertTimeZone());
}
@Override
public Timestamp getTimestamp() throws SQLException {
if (isNull()) return null;
return Timestamp.valueOf(getString().trim());
}
@Override
public BigInteger getBigInteger() throws SQLException {
if (isNull()) return null;
try {
return new BigInteger(getString().trim());
} catch (NumberFormatException e) {
throw new TypeConversionException(BIG_INTEGER_CONVERSION_ERROR + " " + getString().trim());
}
}
//--- setXXX methods
//----- Math code
@Override
public void setByte(byte value) throws SQLException {
setString(Byte.toString(value));
}
@Override
public void setShort(short value) throws SQLException {
setString(Short.toString(value));
}
@Override
public void setInteger(int value) throws SQLException {
setString(Integer.toString(value));
}
@Override
public void setLong(long value) throws SQLException {
setString(Long.toString(value));
}
@Override
public void setFloat(float value) throws SQLException {
setString(Float.toString(value));
}
@Override
public void setDouble(double value) throws SQLException {
setString(Double.toString(value));
}
@Override
public void setBigDecimal(BigDecimal value) throws SQLException {
if (value == null) {
setNull();
return;
}
setString(value.toString());
}
//----- setBoolean, setString and setObject code
@Override
public void setBoolean(boolean value) throws SQLException {
if (possibleCharLength > 4) {
setString(value ? LONG_TRUE : LONG_FALSE);
} else if (possibleCharLength >= 1) {
setString(value ? SHORT_TRUE : SHORT_FALSE);
}
}
@Override
public void setString(String value) throws SQLException {
if (value == null) {
setNull();
return;
}
setFieldData(getDatatypeCoder().encodeString(value, encodingDefinition.getEncoding(), mappingPath));
}
//----- setXXXStream code
@Override
protected void setBinaryStreamInternal(InputStream in, long length) throws SQLException {
if (in == null) {
setNull();
return;
}
// TODO More specific value
if (length > Integer.MAX_VALUE) {
throw new FBDriverNotCapableException("Only length <= Integer.MAX_VALUE supported");
}
try {
setBytes(IOUtils.toBytes(in, (int) length));
} catch (IOException ioex) {
throw new TypeConversionException(BINARY_STREAM_CONVERSION_ERROR);
}
}
@Override
protected void setCharacterStreamInternal(Reader in, long length) throws SQLException {
if (in == null) {
setNull();
return;
}
// TODO More specific value
if (length > Integer.MAX_VALUE) {
throw new FBDriverNotCapableException("Only length <= Integer.MAX_VALUE supported");
}
try {
setString(IOUtils.toString(in, (int) length));
} catch (IOException ioex) {
throw new TypeConversionException(CHARACTER_STREAM_CONVERSION_ERROR);
}
}
@Override
public void setBytes(byte[] value) throws SQLException {
if (value == null) {
setNull();
return;
}
if (value.length > fieldDescriptor.getLength()) {
throw new DataTruncation(fieldDescriptor.getPosition() + 1, true, false, value.length,
fieldDescriptor.getLength());
}
setFieldData(value);
}
//----- setDate, setTime and setTimestamp code
@Override
public void setDate(Date value, Calendar cal) throws SQLException {
if (value == null) {
setNull();
return;
}
setDate(getDatatypeCoder().encodeDate(value, cal));
}
@Override
public void setDate(Date value) throws SQLException {
if (value == null) {
setNull();
return;
}
setString(value.toString());
}
@Override
public void setTime(Time value, Calendar cal) throws SQLException {
if (value == null) {
setNull();
return;
}
setTime(getDatatypeCoder().encodeTime(value, cal, isInvertTimeZone()));
}
@Override
public void setTime(Time value) throws SQLException {
if (value == null) {
setNull();
return;
}
setString(value.toString());
}
@Override
public void setTimestamp(Timestamp value, Calendar cal) throws SQLException {
if (value == null) {
setNull();
return;
}
setTimestamp(getDatatypeCoder().encodeTimestamp(value, cal, isInvertTimeZone()));
}
@Override
public void setTimestamp(Timestamp value) throws SQLException {
if (value == null) {
setNull();
return;
}
setString(value.toString());
}
@Override
public void setBigInteger(BigInteger value) throws SQLException {
if (value == null) {
setNull();
return;
}
setString(value.toString());
}
}