--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/visualizer/Filter/src/com/sun/hotspot/igv/filter/FilterChain.java	Tue Feb 07 22:41:09 2012 +0100
@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+package com.sun.hotspot.igv.filter;
+
+import com.sun.hotspot.igv.data.ChangedEvent;
+import com.sun.hotspot.igv.data.ChangedEventProvider;
+import com.sun.hotspot.igv.data.ChangedListener;
+import com.sun.hotspot.igv.graph.Diagram;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ *
+ * @author Thomas Wuerthinger
+ */
+public class FilterChain implements ChangedEventProvider<FilterChain> {
+
+    private List<Filter> filters;
+    private transient ChangedEvent<FilterChain> changedEvent;
+    
+    private ChangedListener<Filter> changedListener = new ChangedListener<Filter>() {
+        @Override
+        public void changed(Filter source) {
+            changedEvent.fire();
+        }
+    };
+
+    public FilterChain() {
+        filters = new ArrayList<>();
+        changedEvent = new ChangedEvent<>(this);
+    }
+
+    public FilterChain(FilterChain f) {
+        this.filters = new ArrayList<>(f.filters);
+        changedEvent = new ChangedEvent<>(this);
+    }
+
+    @Override
+    public ChangedEvent<FilterChain> getChangedEvent() {
+        return changedEvent;
+    }
+
+    public Filter getFilterAt(int index) {
+        assert index >= 0 && index < filters.size();
+        return filters.get(index);
+    }
+
+    public void apply(Diagram d) {
+        for (Filter f : filters) {
+            f.apply(d);
+        }
+    }
+
+    public void apply(Diagram d, FilterChain sequence) {
+        List<Filter> applied = new ArrayList<>();
+        for (Filter f : sequence.getFilters()) {
+            if (filters.contains(f)) {
+                f.apply(d);
+                applied.add(f);
+            }
+        }
+
+
+        for (Filter f : filters) {
+            if (!applied.contains(f)) {
+                f.apply(d);
+            }
+        }
+    }
+
+
+    public void addFilter(Filter filter) {
+        assert filter != null;
+        filters.add(filter);
+        filter.getChangedEvent().addListener(changedListener);
+        changedEvent.fire();
+    }
+
+    public boolean containsFilter(Filter filter) {
+        return filters.contains(filter);
+    }
+
+    public void removeFilter(Filter filter) {
+        assert filters.contains(filter);
+        filters.remove(filter);
+        filter.getChangedEvent().removeListener(changedListener);
+        changedEvent.fire();
+    }
+
+    public void moveFilterUp(Filter filter) {
+        assert filters.contains(filter);
+        int index = filters.indexOf(filter);
+        if (index != 0) {
+            filters.remove(index);
+            filters.add(index - 1, filter);
+        }
+        changedEvent.fire();
+    }
+
+    public void moveFilterDown(Filter filter) {
+        assert filters.contains(filter);
+        int index = filters.indexOf(filter);
+        if (index != filters.size() - 1) {
+            filters.remove(index);
+            filters.add(index + 1, filter);
+        }
+        changedEvent.fire();
+    }
+
+    public List<Filter> getFilters() {
+        return Collections.unmodifiableList(filters);
+    }
+}