/* Copyright (c) 2001-2017, 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;
}
}