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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 java.io.InputStream;
import org.hsqldb.SessionInterface;
import org.hsqldb.error.Error;
import org.hsqldb.result.Result;
import org.hsqldb.result.ResultLob;
/**
* Locator for BLOB.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.5
* @since 1.9.0
*/
public class BlobDataID implements BlobData {
long id;
long length = -1;
public BlobDataID(long id) {
this.id = id;
}
public BlobData duplicate(SessionInterface session) {
ResultLob resultOut = ResultLob.newLobDuplicateRequest(id);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw resultIn.getException();
}
long lobID = ((ResultLob) resultIn).getLobID();
return new BlobDataID(lobID);
}
public void free() {}
public InputStream getBinaryStream(SessionInterface session) {
long length = length(session);
return new BlobInputStream(session, this, 0, length);
}
public InputStream getBinaryStream(SessionInterface session, long pos,
long length) {
return new BlobInputStream(session, this, pos, length);
}
public byte[] getBytes() {
return null;
}
public byte[] getBytes(SessionInterface session, long pos, int length) {
long blobLength = length(session);
if (pos >= blobLength) {
return new byte[0];
}
if (pos + length >= blobLength) {
length = (int) (blobLength - pos);
}
ResultLob resultOut = ResultLob.newLobGetBytesRequest(id, pos, length);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw Error.error(resultIn);
}
return ((ResultLob) resultIn).getByteArray();
}
public BlobData getBlob(SessionInterface session, long pos, long length) {
ResultLob resultOut = ResultLob.newLobGetRequest(id, pos, length);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw Error.error(resultIn);
}
long lobID = ((ResultLob) resultIn).getLobID();
return new BlobDataID(lobID);
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public int getStreamBlockSize() {
return 0;
}
public boolean isClosed() {
return false;
}
public long length(SessionInterface session) {
if (length > -1) {
return length;
}
ResultLob resultOut = ResultLob.newLobGetLengthRequest(id);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw resultIn.getException();
}
length = ((ResultLob) resultIn).getBlockLength();
return length;
}
public long bitLength(SessionInterface session) {
return length(session) * 8;
}
public boolean isBits() {
return false;
}
public long position(SessionInterface session, BlobData pattern,
long start) {
ResultLob resultOut = ResultLob.newLobGetCharPatternPositionRequest(id,
pattern.getId(), start);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw resultIn.getException();
}
return ((ResultLob) resultIn).getOffset();
}
public long position(SessionInterface session, byte[] pattern,
long start) {
ResultLob resultOut = ResultLob.newLobGetBytePatternPositionRequest(id,
pattern, start);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw resultIn.getException();
}
return ((ResultLob) resultIn).getOffset();
}
/** @todo - implement the next method call in Session */
public long nonZeroLength(SessionInterface session) {
ResultLob resultOut = ResultLob.newLobGetTruncateLength(id);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw resultIn.getException();
}
return ((ResultLob) resultIn).getBlockLength();
}
public void setBytes(SessionInterface session, long pos, byte[] bytes,
int offset, int len) {
if (offset != 0 || len != bytes.length) {
if (!BinaryData.isInLimits(bytes.length, offset, len)) {
throw new IndexOutOfBoundsException();
}
byte[] newbytes = new byte[len];
System.arraycopy(bytes, offset, newbytes, 0, len);
bytes = newbytes;
}
ResultLob resultOut = ResultLob.newLobSetBytesRequest(id, pos, bytes);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw resultIn.getException();
}
length = ((ResultLob) resultIn).getBlockLength();
}
public void setBytes(SessionInterface session, long pos, byte[] bytes) {
setBytes(session, pos, bytes, 0, bytes.length);
}
public void setBytes(SessionInterface session, long pos, BlobData b,
long offset, long length) {
if (length > Integer.MAX_VALUE) {
throw new IndexOutOfBoundsException();
}
byte[] bytes = b.getBytes(session, offset, (int) length);
setBytes(session, pos, bytes, 0, bytes.length);
}
public void setBinaryStream(SessionInterface session, long pos,
InputStream in) {
//
}
public void setSession(SessionInterface session) {}
public void truncate(SessionInterface session, long len) {
if (len >= length(session)) {
return;
}
ResultLob resultOut = ResultLob.newLobTruncateRequest(id, len);
Result resultIn = session.execute(resultOut);
if (resultIn.isError()) {
throw resultIn.getException();
}
}
public boolean isBinary() {
return true;
}
public boolean equals(Object other) {
if (other instanceof BlobDataID) {
return id == ((BlobDataID) other).id;
}
return false;
}
public int hashCode() {
return (int) id;
}
}