/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.pvm.internal.lob;
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import java.io.ObjectStreamException;
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import java.io.Serializable;
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import java.util.List;
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import org.jbpm.pvm.internal.env.EnvironmentImpl;
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import org.jbpm.pvm.internal.id.DbidGenerator;
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/**
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* @author Tom Baeyens
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*/
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public class Lob implements Serializable {
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private static final long serialVersionUID = 1L;
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public static final BlobStrategy DEFAULT_BLOB_STRATEGY = new BlobStrategyBlob();
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public static final ClobStrategy DEFAULT_CLOB_STRATEGY = new ClobStrategyChopped();
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protected long dbid;
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protected int dbversion;
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// cachedBytes is used by the BlobStrategyBlob as hibernate doesn't allow
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// blobs to be read in the same session as they are created in.
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// So cachedBytes should not be persisted
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protected byte[] cachedBytes = null;
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protected java.sql.Blob blob = null;
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protected byte[] bytes = null;
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protected List<BytesChop> bytesChops = null;
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protected char[] cachedChars = null;
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protected java.sql.Clob clob = null;
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protected String text = null;
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protected List<CharChop> charChops = null;
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public long getDbid() {
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return dbid;
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}
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public void setDbid(long dbid) {
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this.dbid = dbid;
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}
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// Only for Hibernate. Do not use directly!
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public Lob() {
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}
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/**
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* @param bytes The actual bytes that will be stored.
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* @param generateId If true, the default {@link DbidGenerator} will be used
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* generate a dbid for this Lob object.
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*/
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public Lob(byte[] bytes, boolean generateDbid) {
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cachedBytes = bytes;
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getBlobStrategy().set(bytes, this);
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if (generateDbid) {
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this.dbid = DbidGenerator.getDbidGenerator().getNextId();
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}
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}
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public Lob(char[] text, boolean generateDbid) {
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cachedChars = text;
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getClobStrategy().set(text, this);
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if (generateDbid) {
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this.dbid = DbidGenerator.getDbidGenerator().getNextId();
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}
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}
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public char[] extractChars() {
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return getClobStrategy().get(this);
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}
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public byte[] extractBytes() {
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return getBlobStrategy().get(this);
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}
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protected ClobStrategy getClobStrategy() {
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ClobStrategy clobStrategy = null;
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EnvironmentImpl environment = EnvironmentImpl.getCurrent();
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if (environment!=null) {
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clobStrategy = environment.get(ClobStrategy.class);
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}
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if (clobStrategy==null) {
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clobStrategy = DEFAULT_CLOB_STRATEGY;
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}
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return clobStrategy;
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}
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protected BlobStrategy getBlobStrategy() {
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BlobStrategy blobStrategy = EnvironmentImpl.getFromCurrent(BlobStrategy.class, false);
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if (blobStrategy==null) {
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blobStrategy = DEFAULT_BLOB_STRATEGY;
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}
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return blobStrategy;
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}
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protected Object readResolve() throws ObjectStreamException {
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if (cachedBytes!=null) {
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getBlobStrategy().set(cachedBytes, this);
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}
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if (cachedChars!=null) {
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getClobStrategy().set(cachedChars, this);
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}
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return this;
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}
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protected Object writeReplace() throws ObjectStreamException {
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blob = null;
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clob = null;
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return this;
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}
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}
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