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/*
* Copyright 2006-2012 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.amazon.carbonado.repo.jdbc;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.Clob;
import com.amazon.carbonado.FetchException;
import com.amazon.carbonado.PersistException;
/**
*
*
* @author Brian S O'Neill
*/
class OracleClob extends JDBCClob {
OracleClob(JDBCRepository repo, Clob clob, JDBCClobLoader loader) {
super(repo, clob, loader);
}
@Override
public Reader openReader() throws FetchException {
return openReader(0);
}
@Override
public Reader openReader(long pos) throws FetchException {
Method m = support().mCLOB_getCharacterStream;
if (m == null) {
return super.openReader(pos);
}
try {
return (Reader) m.invoke(getInternalClobForFetch(), pos);
} catch (InvocationTargetException e) {
throw mRepo.toFetchException(e.getCause());
} catch (Exception e) {
throw mRepo.toFetchException(e);
}
}
@Override
public Reader openReader(long pos, int bufferSize) throws FetchException {
return openReader(pos);
}
@Override
public long getLength() throws FetchException {
Method m = support().mCLOB_length;
if (m == null) {
return super.getLength();
}
try {
return (Long) m.invoke(getInternalClobForFetch());
} catch (InvocationTargetException e) {
throw mRepo.toFetchException(e.getCause());
} catch (Exception e) {
throw mRepo.toFetchException(e);
}
}
@Override
public Writer openWriter() throws PersistException {
return openWriter(0);
}
@Override
public Writer openWriter(long pos) throws PersistException {
Method m = support().mCLOB_getCharacterOutputStream;
if (m == null) {
return super.openWriter(pos);
}
try {
return (Writer) m.invoke(getInternalClobForPersist(), pos);
} catch (InvocationTargetException e) {
throw mRepo.toPersistException(e.getCause());
} catch (Exception e) {
throw mRepo.toPersistException(e);
}
}
@Override
public Writer openWriter(long pos, int bufferSize) throws PersistException {
return openWriter(pos);
}
@Override
public void setLength(long length) throws PersistException {
// FIXME: Add special code to support increasing length
Method m = support().mCLOB_trim;
if (m == null) {
super.setLength(length);
return;
}
try {
m.invoke(getInternalClobForPersist(), length);
} catch (InvocationTargetException e) {
throw mRepo.toPersistException(e.getCause());
} catch (Exception e) {
throw mRepo.toPersistException(e);
}
}
private OracleSupportStrategy support() {
return (OracleSupportStrategy) mRepo.getSupportStrategy();
}
}
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