at.spardat.xma.mdl.util.TransStringSetN Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2003, 2007 s IT Solutions AT Spardat GmbH .
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* s IT Solutions AT Spardat GmbH - initial API and implementation
*******************************************************************************/
// @(#) $Id: TransStringSetN.java 2089 2007-11-28 13:56:13Z s3460 $
package at.spardat.xma.mdl.util;
import java.io.IOException;
import java.util.HashSet;
import java.util.Iterator;
import at.spardat.xma.mdl.MemoryEstimator;
import at.spardat.xma.serializer.XmaInput;
import at.spardat.xma.serializer.XmaOutput;
/**
* A transactional string set that is not size restricted.
*
* @author YSD, 10.04.2003 11:30:25
*/
public class TransStringSetN extends TransStringSet {
/**
* @see at.spardat.xma.mdl.util.TransStringSet#commit()
*/
public void commit() {
saved_ = null;
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#rollback()
*/
public void rollback() {
if (saved_ != null) {
selected_ = saved_;
saved_ = null;
}
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#changed()
*/
public boolean changed() {
return saved_ != null;
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#add(java.lang.String)
*/
public boolean add (String key) {
if (key == null) throw new IllegalArgumentException();
if (selected_.contains(key)) return false;
ensureSaved();
selected_.add(key);
return true;
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#remove(java.lang.String)
*/
public boolean remove (String key) {
if (!selected_.contains(key)) return false;
ensureSaved();
selected_.remove(key);
return true;
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#clear()
*/
public void clear () {
if (selected_.size() == 0) return;
ensureSaved();
selected_.clear();
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#size()
*/
public int size() {
return selected_.size();
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#getSome()
*/
public String getSome() {
if (selected_.size() == 0) return null;
Iterator iter = selected_.iterator();
return (String) iter.next();
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#getAll()
*/
public String[] getAll() {
String [] toReturn = new String[size()];
Iterator iter = selected_.iterator();
for (int i=0; iter.hasNext(); i++) {
toReturn[i] = (String) iter.next();
}
return toReturn;
}
/**
* @see at.spardat.xma.mdl.util.TransStringSet#contains(java.lang.String)
*/
public boolean contains (String key) {
if (key == null) return false;
return selected_.contains(key);
}
/**
* @see at.spardat.xma.mdl.Synchronization#externalize(at.spardat.xma.serializer.XmaOutput, boolean)
*/
public void externalize (XmaOutput o, boolean forceFull) throws IOException {
// write the number of Strings in this
o.writeInt("size", selected_.size());
// the selection strings
Iterator iter = selected_.iterator();
while (iter.hasNext()) {
String sel = (String) iter.next();
o.writeString("sel", sel);
}
}
/**
* @see at.spardat.xma.mdl.Synchronization#internalize(at.spardat.xma.serializer.XmaInput)
*/
public void internalize (XmaInput i) throws IOException, ClassNotFoundException {
// read number of entries and reset HashSet
selected_.clear();
int numSelections = i.readInt();
for (int j=0; j