AbstractCommitmentFilter.java

/*
* AbstractCommitmentFilter.java
*
* This file is part of the STS-Tool project.
* Copyright (c) 2011-2012 "University of Trento - DISI" All rights reserved.
*
* Is strictly forbidden to remove this copyright notice from this source code.
*
* Disclaimer of Warranty:
* STS-Tool (this software) is provided "as-is" and without warranty of any kind, 
* express, implied or otherwise, including without limitation, any warranty of 
* merchantability or fitness for a particular purpose.
* In no event shall the copyright holder or contributors be liable for any direct,
* indirect, incidental, special, exemplary, or consequential damages
* including, but not limited to, procurement of substitute goods or services;
* loss of use, data, or profits; or business interruption) however caused and on
* any theory of liability, whether in contract, strict liability, or tort (including
* negligence or otherwise) arising in any way out of the use of this software, even 
* if advised of the possibility of such damage.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 
* "University of Trento - DISI","University of Trento - DISI" DISCLAIMS THE
* WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://www.sts-tool.eu/License.php
*
* For more information, please contact STS-Tool group at this
* address: ststool@disi.unitn.it
*
*/
package eu.aniketos.wp1.ststool.commitments.filters;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import eu.aniketos.wp1.ststool.commitments.utils.StringMatcher;


public abstract class AbstractCommitmentFilter extends ViewerFilter {

	private final StructuredViewer	viewer;
	private List<String>					patterns		= new ArrayList<String>();

	boolean									filtering	= false;



	public AbstractCommitmentFilter(StructuredViewer viewer) {

		this.viewer = viewer;
	}

	public String getPattern(){

		if (patterns == null) return "";
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < patterns.size(); i++) {
			if (i > 0) sb.append(" | ");
			sb.append(patterns.get(i));
		}
		return sb.toString();
	}

	public void setPattern(String newPattern){

		if (newPattern != null && !newPattern.equals("")) {
			patterns = new ArrayList<String>();
			String[] pat = newPattern.split("\\|");
			for (String s : pat) {
				patterns.add(s.trim());
			}
			if (!filtering) {
				viewer.addFilter(this);
				filtering = true;
			} else
				viewer.refresh();
		} else {
			if (filtering) viewer.removeFilter(this);
			filtering = false;
			patterns = null;
		}
	}

	@Override
	public boolean select(Viewer viewer,Object parentElement,Object element){

		boolean found = false;
		Iterator i = patterns.iterator();
		String value = getElementString(element);
		while (i.hasNext() && !found) {
			try {
				String s = (String) i.next();
				found = match(s, value);

			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return found;
	}

	protected boolean match(String text,String value){
		StringMatcher sm = new StringMatcher(text, true, false);
		return sm.match(value);
	}

	abstract String getElementString(Object element);

}