org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/filter/FilterManager.java

   1 /*******************************************************************************
   2  * Copyright (c) 2010, 2012 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Patrick Tasse - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.tmf.ui.views.filter;
  14
  15 import java.io.FileNotFoundException;
  16 import java.io.IOException;
  17
  18 import javax.xml.parsers.ParserConfigurationException;
  19
  20 import org.eclipse.linuxtools.internal.tmf.ui.Activator;
  21 import org.eclipse.linuxtools.tmf.core.filter.model.ITmfFilterTreeNode;
  22 import org.eclipse.linuxtools.tmf.core.filter.model.TmfFilterRootNode;
  23 import org.eclipse.linuxtools.tmf.core.filter.xml.TmfFilterXMLParser;
  24 import org.eclipse.linuxtools.tmf.core.filter.xml.TmfFilterXMLWriter;
  25 import org.xml.sax.SAXException;
  26
  27 /**
  28  * Central filter manager
  29  *
  30  * @version 1.0
  31  * @author Patrick Tasse
  32  */
  33 public class FilterManager {
  34
  35     private static final String SAVED_FILTERS_FILE_NAME = "saved_filters.xml"; //$NON-NLS-1$
  36     private static final String SAVED_FILTERS_PATH_NAME =
  37         Activator.getDefault().getStateLocation().addTrailingSeparator().append(SAVED_FILTERS_FILE_NAME).toString();
  38
  39     private static ITmfFilterTreeNode fRoot = new TmfFilterRootNode();
  40     static {
  41         try {
  42             fRoot = new TmfFilterXMLParser(SAVED_FILTERS_PATH_NAME).getTree();
  43         } catch (FileNotFoundException e) {
  44         } catch (SAXException e) {
  45             Activator.getDefault().logError("Error parsing saved filter xml file: " + SAVED_FILTERS_PATH_NAME, e); //$NON-NLS-1$
  46         } catch (IOException e) {
  47             Activator.getDefault().logError("Error parsing saved filter xml file: " + SAVED_FILTERS_PATH_NAME, e); //$NON-NLS-1$
  48         }
  49     }
  50
  51     /**
  52      * Retrieve the currently saved filters
  53      *
  54      * @return The array of filters
  55      */
  56     public static ITmfFilterTreeNode[] getSavedFilters() {
  57         return fRoot.clone().getChildren();
  58     }
  59
  60     /**
  61      * Set the passed filters as the currently saved ones.
  62      *
  63      * @param filters
  64      *            The filters to save
  65      */
  66     public static void setSavedFilters(ITmfFilterTreeNode[] filters) {
  67         fRoot = new TmfFilterRootNode();
  68         for (ITmfFilterTreeNode filter : filters) {
  69             fRoot.addChild(filter.clone());
  70         }
  71         try {
  72             TmfFilterXMLWriter writerXML = new TmfFilterXMLWriter(fRoot);
  73             writerXML.saveTree(SAVED_FILTERS_PATH_NAME);
  74         } catch (ParserConfigurationException e) {
  75             Activator.getDefault().logError("Error saving filter xml file: " + SAVED_FILTERS_PATH_NAME, e); //$NON-NLS-1$
  76         }
  77     }
  78 }