/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.core.types;
import java.io.Externalizable;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.Reader;
import java.nio.charset.Charset;
import java.sql.SQLException;
import org.teiid.core.types.InputStreamFactory.StreamFactoryReference;
import org.teiid.core.util.InputStreamReader;
public class BaseLob implements Externalizable, StreamFactoryReference {
private static final long serialVersionUID = -1586959324208959519L;
private InputStreamFactory streamFactory;
private Charset charset;
public BaseLob() {
}
protected BaseLob(InputStreamFactory streamFactory) {
this.streamFactory = streamFactory;
}
public void setStreamFactory(InputStreamFactory streamFactory) {
this.streamFactory = streamFactory;
}
public InputStreamFactory getStreamFactory() throws SQLException {
if (this.streamFactory == null) {
throw new SQLException("Already freed"); //$NON-NLS-1$
}
return streamFactory;
}
public void setEncoding(String encoding) {
if (encoding != null) {
this.charset = Charset.forName(encoding);
} else {
this.charset = null;
}
}
public Charset getCharset() {
return charset;
}
public void setCharset(Charset charset) {
this.charset = charset;
}
public void free() throws SQLException {
if (this.streamFactory != null) {
try {
this.streamFactory.free();
this.streamFactory = null;
} catch (IOException e) {
SQLException ex = new SQLException(e.getMessage());
ex.initCause(e);
throw ex;
}
}
}
public Reader getCharacterStream() throws SQLException {
try {
Reader r = this.getStreamFactory().getCharacterStream();
if (r != null) {
return r;
}
} catch (IOException e) {
SQLException ex = new SQLException(e.getMessage());
ex.initCause(e);
throw ex;
}
Charset cs = getCharset();
if (cs == null) {
cs = Streamable.CHARSET;
}
return new InputStreamReader(getBinaryStream(), cs.newDecoder());
}
public InputStream getBinaryStream() throws SQLException {
try {
return this.getStreamFactory().getInputStream();
} catch (IOException e) {
SQLException ex = new SQLException(e.getMessage());
ex.initCause(e);
throw ex;
}
}
@Override
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
streamFactory = (InputStreamFactory)in.readObject();
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject(streamFactory);
}
}