/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jbpm.pvm.internal.lob;
import java.io.ObjectStreamException;
import java.io.Serializable;
import java.util.List;
import org.jbpm.pvm.internal.env.EnvironmentImpl;
import org.jbpm.pvm.internal.id.DbidGenerator;
/**
* @author Tom Baeyens
*/
public class Lob implements Serializable {
private static final long serialVersionUID = 1L;
public static final BlobStrategy DEFAULT_BLOB_STRATEGY = new BlobStrategyBlob();
public static final ClobStrategy DEFAULT_CLOB_STRATEGY = new ClobStrategyChopped();
protected long dbid;
protected int dbversion;
// cachedBytes is used by the BlobStrategyBlob as hibernate doesn't allow
// blobs to be read in the same session as they are created in.
// So cachedBytes should not be persisted
protected byte[] cachedBytes = null;
protected java.sql.Blob blob = null;
protected byte[] bytes = null;
protected List<BytesChop> bytesChops = null;
protected char[] cachedChars = null;
protected java.sql.Clob clob = null;
protected String text = null;
protected List<CharChop> charChops = null;
public long getDbid() {
return dbid;
}
public void setDbid(long dbid) {
this.dbid = dbid;
}
// Only for Hibernate. Do not use directly!
public Lob() {
}
/**
* @param bytes The actual bytes that will be stored.
* @param generateId If true, the default {@link DbidGenerator} will be used
* generate a dbid for this Lob object.
*/
public Lob(byte[] bytes, boolean generateDbid) {
cachedBytes = bytes;
getBlobStrategy().set(bytes, this);
if (generateDbid) {
this.dbid = DbidGenerator.getDbidGenerator().getNextId();
}
}
public Lob(char[] text, boolean generateDbid) {
cachedChars = text;
getClobStrategy().set(text, this);
if (generateDbid) {
this.dbid = DbidGenerator.getDbidGenerator().getNextId();
}
}
public char[] extractChars() {
return getClobStrategy().get(this);
}
public byte[] extractBytes() {
return getBlobStrategy().get(this);
}
protected ClobStrategy getClobStrategy() {
ClobStrategy clobStrategy = null;
EnvironmentImpl environment = EnvironmentImpl.getCurrent();
if (environment!=null) {
clobStrategy = environment.get(ClobStrategy.class);
}
if (clobStrategy==null) {
clobStrategy = DEFAULT_CLOB_STRATEGY;
}
return clobStrategy;
}
protected BlobStrategy getBlobStrategy() {
BlobStrategy blobStrategy = EnvironmentImpl.getFromCurrent(BlobStrategy.class, false);
if (blobStrategy==null) {
blobStrategy = DEFAULT_BLOB_STRATEGY;
}
return blobStrategy;
}
protected Object readResolve() throws ObjectStreamException {
if (cachedBytes!=null) {
getBlobStrategy().set(cachedBytes, this);
}
if (cachedChars!=null) {
getClobStrategy().set(cachedChars, this);
}
return this;
}
protected Object writeReplace() throws ObjectStreamException {
blob = null;
clob = null;
return this;
}
}