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/* Copyright (c) 2001-2019, The HSQL Development Group
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*
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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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.
*
* @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;
}
}