org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/internal/tmf/core/filter/TmfCollapseFilter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2014 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  *   Bernd Hufmann - Initial API and implementation
  11  *******************************************************************************/
  12 package org.eclipse.linuxtools.internal.tmf.core.filter;
  13
  14 import java.util.List;
  15
  16 import org.eclipse.linuxtools.tmf.core.event.ITmfEvent;
  17 import org.eclipse.linuxtools.tmf.core.event.collapse.ITmfCollapsibleEvent;
  18 import org.eclipse.linuxtools.tmf.core.filter.model.ITmfFilterTreeNode;
  19
  20 /**
  21  * Stateful filter that compares consecutive events for collapsing feature.
  22  *
  23  * Usage of this class in conjunction with other {@link ITmfFilterTreeNode}
  24  * filters is not supported. Will throw {@link UnsupportedOperationException}
  25  * in that case.
  26  *
  27  * @author Bernd Hufmann
  28  */
  29 public class TmfCollapseFilter implements ITmfFilterTreeNode {
  30
  31     private static final String COLLAPSE_NODE_NAME = "Collapse"; //$NON-NLS-1$
  32
  33     private ITmfCollapsibleEvent fPrevEvent = null;
  34
  35     @Override
  36     public boolean matches(ITmfEvent event) {
  37
  38         if (fPrevEvent != null) {
  39             if (event instanceof ITmfCollapsibleEvent) {
  40                 boolean isCollapsible = fPrevEvent.isCollapsibleWith(event);
  41                 fPrevEvent = (ITmfCollapsibleEvent) event;
  42                 if (isCollapsible) {
  43                     return false;
  44                 }
  45             } else {
  46                 fPrevEvent = null;
  47             }
  48         } else {
  49             if (event instanceof ITmfCollapsibleEvent) {
  50                 fPrevEvent = (ITmfCollapsibleEvent) event;
  51             }
  52         }
  53         return true;
  54     }
  55
  56     @Override
  57     public ITmfFilterTreeNode getParent() {
  58         return null;
  59     }
  60
  61     @Override
  62     public String getNodeName() {
  63         return COLLAPSE_NODE_NAME;
  64     }
  65
  66     @Override
  67     public boolean hasChildren() {
  68         return false;
  69     }
  70
  71     @Override
  72     public int getChildrenCount() {
  73         return 0;
  74     }
  75
  76     @Override
  77     public ITmfFilterTreeNode[] getChildren() {
  78         return new ITmfFilterTreeNode[0];
  79     }
  80
  81     @Override
  82     public ITmfFilterTreeNode getChild(int index) {
  83         throw new UnsupportedOperationException();
  84     }
  85
  86     @Override
  87     public ITmfFilterTreeNode remove() {
  88         throw new UnsupportedOperationException();
  89     }
  90
  91     @Override
  92     public ITmfFilterTreeNode removeChild(ITmfFilterTreeNode node) {
  93         throw new UnsupportedOperationException();
  94     }
  95
  96     @Override
  97     public int addChild(ITmfFilterTreeNode node) {
  98         throw new UnsupportedOperationException();
  99     }
 100
 101     @Override
 102     public ITmfFilterTreeNode replaceChild(int index, ITmfFilterTreeNode node) {
 103         throw new UnsupportedOperationException();
 104     }
 105
 106     @Override
 107     public void setParent(ITmfFilterTreeNode parent) {
 108     }
 109
 110     @Override
 111     public List<String> getValidChildren() {
 112         throw new UnsupportedOperationException();
 113     }
 114
 115     @Override
 116     public ITmfFilterTreeNode clone() {
 117         return new TmfCollapseFilter();
 118     }
 119 }