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HSQLDB - Lightweight 100% Java SQL Database Engine
/* Copyright (c) 2001-2019, 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.types;
import org.hsqldb.Session;
import org.hsqldb.SessionInterface;
import org.hsqldb.Tokens;
import org.hsqldb.error.Error;
import org.hsqldb.error.ErrorCode;
import org.hsqldb.jdbc.JDBCBlobClient;
/**
* Type object for BLOB.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.5.0
* @since 1.9.0
*/
public final class BlobType extends BinaryType {
public static final long maxBlobPrecision = 1024L * 1024 * 1024 * 1024;
public static final int defaultBlobSize = 1024 * 1024 * 1024;
public static final int defaultShortBlobSize = 16 * 1024 * 1024;
public BlobType(long precision) {
super(Types.SQL_BLOB, precision);
}
public int displaySize() {
return precision > Integer.MAX_VALUE ? Integer.MAX_VALUE
: (int) precision;
}
public int getJDBCTypeCode() {
return Types.BLOB;
}
public Class getJDBCClass() {
return java.sql.Blob.class;
}
public String getJDBCClassName() {
return "java.sql.Blob";
}
public String getNameString() {
return Tokens.T_BLOB;
}
public String getFullNameString() {
return "BINARY LARGE OBJECT";
}
public String getDefinition() {
long factor = precision;
String multiplier = null;
if (precision % (1024 * 1024 * 1024) == 0) {
factor = precision / (1024 * 1024 * 1024);
multiplier = Tokens.T_G_FACTOR;
} else if (precision % (1024 * 1024) == 0) {
factor = precision / (1024 * 1024);
multiplier = Tokens.T_M_FACTOR;
} else if (precision % (1024) == 0) {
factor = precision / (1024);
multiplier = Tokens.T_K_FACTOR;
}
StringBuilder sb = new StringBuilder(16);
sb.append(getNameString());
sb.append('(');
sb.append(factor);
if (multiplier != null) {
sb.append(multiplier);
}
sb.append(')');
return sb.toString();
}
public boolean isBinaryType() {
return true;
}
public boolean isLobType() {
return true;
}
public boolean acceptsPrecision() {
return true;
}
public long getMaxPrecision() {
return maxBlobPrecision;
}
public boolean requiresPrecision() {
return false;
}
public int compare(Session session, Object a, Object b) {
if (a == b) {
return 0;
}
if (a == null) {
return -1;
}
if (b == null) {
return 1;
}
if (b instanceof BinaryData) {
long lobId = ((BlobData) a).getId();
return session.database.lobManager.compare(lobId,
((BlobData) b).getBytes());
}
return session.database.lobManager.compare((BlobData) a, (BlobData) b);
}
/** @todo - implement */
public Object convertToTypeLimits(SessionInterface session, Object a) {
return a;
}
public Object castToType(SessionInterface session, Object a,
Type otherType) {
if (a == null) {
return null;
}
if (otherType.typeCode == Types.SQL_BLOB) {
BlobData b = (BlobData) a;
long blobLength = b.length(session);
if (blobLength > precision) {
blobLength = precision;
session.addWarning(Error.error(ErrorCode.W_01004));
b = b.getBlob(session, 0, blobLength);
return b;
}
return a;
}
if (otherType.typeCode == Types.SQL_BINARY
|| otherType.typeCode == Types.SQL_VARBINARY) {
BlobData b = (BlobData) a;
long blobLength = b.length(session);
if (blobLength > precision) {
blobLength = precision;
session.addWarning(Error.error(ErrorCode.W_01004));
}
BlobData blob = session.createBlob(b.length(session));
blob.setBytes(session, 0, b.getBytes(), 0, (int) blobLength);
return blob;
}
throw Error.error(ErrorCode.X_42561);
}
public Object convertToType(SessionInterface session, Object a,
Type otherType) {
BlobData b = null;
if (a == null) {
return null;
}
if (otherType.typeCode == Types.SQL_BLOB) {
b = (BlobData) a;
long blobLength = b.length(session);
if (blobLength > precision) {
throw Error.error(ErrorCode.X_22001);
}
return a;
}
if (otherType.typeCode == Types.SQL_CLOB) {
a = Type.SQL_VARCHAR.convertToType(session, a, otherType);
otherType = Type.SQL_VARCHAR;
}
if (otherType.typeCode == Types.SQL_VARCHAR
|| otherType.typeCode == Types.SQL_CHAR) {
a = session.getScanner().convertToBinary((String) a, false);
otherType = Type.SQL_VARBINARY;
}
if (otherType.typeCode == Types.SQL_BINARY
|| otherType.typeCode == Types.SQL_VARBINARY) {
b = (BlobData) a;
long blobLength = b.length(session);
if (blobLength > precision) {
throw Error.error(ErrorCode.X_22001);
}
BlobData blob = session.createBlob(b.length(session));
blob.setBytes(session, 0, b.getBytes());
return blob;
}
throw Error.error(ErrorCode.X_42561);
}
public Object convertJavaToSQL(SessionInterface session, Object a) {
if (a == null) {
return null;
}
if (a instanceof JDBCBlobClient) {
return ((JDBCBlobClient) a).getBlob();
}
throw Error.error(ErrorCode.X_42561);
}
public Object convertSQLToJava(SessionInterface session, Object a) {
if (a == null) {
return null;
}
if (a instanceof BlobDataID) {
BlobDataID blob = (BlobDataID) a;
return new JDBCBlobClient(session, blob);
}
throw Error.error(ErrorCode.X_42561);
}
public Object convertToDefaultType(SessionInterface session, Object a) {
if (a == null) {
return null;
}
// conversion to Blob via PreparedStatement.setObject();
if (a instanceof byte[]) {
return new BinaryData((byte[]) a, false);
}
throw Error.error(ErrorCode.X_42561);
}
public String convertToString(Object a) {
if (a == null) {
return null;
}
return Long.toString(((BlobData) a).getId());
}
public String convertToSQLString(Object a) {
if (a == null) {
return Tokens.T_NULL;
}
return convertToString(a);
}
}