/* 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.
Reader;
import org.hsqldb.
SessionInterface;
import org.hsqldb.error.
Error;
import org.hsqldb.error.
ErrorCode;
import org.hsqldb.result.
Result;
import org.hsqldb.result.
ResultLob;
/**
* Locator for CLOB.<p>
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.5
* @since 1.9.0
*/
public class
ClobDataID implements
ClobData {
long
id;
long
length = -1;
public
ClobDataID(long
id) {
this.
id =
id;
}
public char[]
getChars(
SessionInterface session, long
position,
int
length) {
ResultLob resultOut =
ResultLob.
newLobGetCharsRequest(
id,
position,
length);
Result resultIn =
session.
execute(
resultOut);
if (
resultIn.
isError()) {
throw
resultIn.
getException();
}
return ((
ResultLob)
resultIn).
getCharArray();
}
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
String getSubString(
SessionInterface session, long
pos,
int
length) {
long
clobLength =
length(
session);
if (
pos >=
clobLength) {
return "";
}
if (
pos +
length >=
clobLength) {
length = (int) (
clobLength -
pos);
}
char[]
chars =
getChars(
session,
pos,
length);
return new
String(
chars);
}
public
ClobData 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
ClobDataID(
lobID);
}
public
ClobData getClob(
SessionInterface session, long
position,
long
length) {
ResultLob resultOut =
ResultLob.
newLobGetRequest(
id,
position,
length);
Result resultIn =
session.
execute(
resultOut);
if (
resultIn.
isError()) {
throw
resultIn.
getException();
}
long
lobID = ((
ResultLob)
resultIn).
getLobID();
return new
ClobDataID(
lobID);
}
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();
}
this.
length = ((
ResultLob)
resultIn).
getBlockLength();
}
public
Reader getCharacterStream(
SessionInterface session) {
long
length =
length(
session);
return new
ClobInputStream(
session, this, 0,
length);
}
public void
setCharacterStream(
SessionInterface session, long
pos,
Reader in) {}
public void
setString(
SessionInterface session, long
pos,
String str) {
ResultLob resultOut =
ResultLob.
newLobSetCharsRequest(
id,
pos,
str.
toCharArray());
Result resultIn =
session.
execute(
resultOut);
if (
resultIn.
isError()) {
throw
resultIn.
getException();
}
this.
length = ((
ResultLob)
resultIn).
getBlockLength();
}
public void
setClob(
SessionInterface session, long
pos,
ClobData clob,
long
offset, long
len) {}
public void
setChars(
SessionInterface session, long
pos, char[]
chars,
int
offset, int
len) {
if (
offset != 0 ||
len !=
chars.length) {
if (!
isInLimits(
chars.length,
offset,
len)) {
throw
Error.
error(
ErrorCode.
X_22001);
}
if (
offset != 0 ||
len !=
chars.length) {
char[]
newChars = new char[
len];
System.
arraycopy(
chars,
offset,
newChars, 0,
len);
chars =
newChars;
}
}
ResultLob resultOut =
ResultLob.
newLobSetCharsRequest(
id,
pos,
chars);
Result resultIn =
session.
execute(
resultOut);
if (
resultIn.
isError()) {
throw
resultIn.
getException();
}
this.
length = ((
ResultLob)
resultIn).
getBlockLength();
}
public long
position(
SessionInterface session,
String searchstr,
long
start) {
ResultLob resultOut =
ResultLob.
newLobGetCharPatternPositionRequest(
id,
searchstr.
toCharArray(),
start);
Result resultIn =
session.
execute(
resultOut);
if (
resultIn.
isError()) {
throw
resultIn.
getException();
}
return ((
ResultLob)
resultIn).
getOffset();
}
public long
position(
SessionInterface session,
ClobData searchstr,
long
start) {
ResultLob resultOut =
ResultLob.
newLobGetCharPatternPositionRequest(
id,
searchstr.
getId(),
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
nonSpaceLength(
SessionInterface session) {
ResultLob resultOut =
ResultLob.
newLobGetTruncateLength(
id);
Result resultIn =
session.
execute(
resultOut);
if (
resultIn.
isError()) {
throw
resultIn.
getException();
}
return ((
ResultLob)
resultIn).
getBlockLength();
}
public
Reader getCharacterStream(
SessionInterface session, long
pos,
long
length) {
return new
ClobInputStream(
session, this,
pos,
length);
}
public long
getId() {
return
id;
}
public void
setId(long
id) {
this.
id =
id;
}
static boolean
isInLimits(long
fullLength, long
pos, long
len) {
return
pos >= 0 &&
len >= 0 &&
pos +
len <=
fullLength;
}
public void
setSession(
SessionInterface session) {}
public boolean
isBinary() {
return false;
}
public boolean
equals(
Object other) {
if (
other instanceof
ClobDataID) {
return
id == ((
ClobDataID)
other).
id;
}
return false;
}
public int
hashCode() {
return (int)
id;
}
}