--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/visualizer/Filter/src/com/sun/hotspot/igv/filter/CombineFilter.java	Tue Feb 07 22:41:09 2012 +0100
@@ -0,0 +1,221 @@
+/*
+ * 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.Properties;
+import com.sun.hotspot.igv.data.Properties.PropertyMatcher;
+import com.sun.hotspot.igv.graph.*;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ *
+ * @author Thomas Wuerthinger
+ */
+public class CombineFilter extends AbstractFilter {
+
+    private List<CombineRule> rules;
+    private String name;
+
+    public CombineFilter(String name) {
+        this.name = name;
+        rules = new ArrayList<>();
+    }
+
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public void apply(Diagram diagram) {
+
+        Properties.PropertySelector<Figure> selector = new Properties.PropertySelector<>(diagram.getFigures());
+        for (CombineRule r : rules) {
+
+            List<Figure> list = selector.selectMultiple(r.getFirstMatcher());
+            Set<Figure> figuresToRemove = new HashSet<>();
+            for (Figure f : list) {
+
+                List<Figure> successors = new ArrayList<>(f.getSuccessors());
+                if (r.isReversed()) {
+                    if (successors.size() == 1) {
+                        Figure succ = successors.get(0);
+                        InputSlot slot = null;
+
+                        for (InputSlot s : succ.getInputSlots()) {
+                            for (Connection c : s.getConnections()) {
+                                if (c.getOutputSlot().getFigure() == f) {
+                                    slot = s;
+                                }
+                            }
+                        }
+
+                        slot.getSource().addSourceNodes(f.getSource());
+                        if (r.getShortProperty() != null) {
+                            String s = f.getProperties().get(r.getShortProperty());
+                            if (s != null && s.length() > 0) {
+                                slot.setShortName(s);
+                                slot.setText(s);
+                                slot.setColor(f.getColor());
+                            }
+                        } else {
+                            assert slot != null;
+                            slot.setText(f.getProperties().get("dump_spec"));
+                            if (f.getProperties().get("short_name") != null) {
+                                slot.setShortName(f.getProperties().get("short_name"));
+                            } else {
+                                String s = f.getProperties().get("dump_spec");
+                                if (s != null && s.length() <= 5) {
+                                    slot.setShortName(s);
+                                }
+                            }
+                        }
+
+                        for (InputSlot s : f.getInputSlots()) {
+                            for (Connection c : s.getConnections()) {
+                                Connection newConn = diagram.createConnection(slot, c.getOutputSlot(), c.getLabel());
+                                newConn.setColor(c.getColor());
+                                newConn.setStyle(c.getStyle());
+                            }
+                        }
+
+                        figuresToRemove.add(f);
+                    }
+                } else {
+
+                    for (Figure succ : successors) {
+                        if (succ.getPredecessors().size() == 1 && succ.getInputSlots().size() == 1) {
+                            if (succ.getProperties().selectSingle(r.getSecondMatcher()) != null && succ.getOutputSlots().size() == 1) {
+
+
+                                OutputSlot oldSlot = null;
+                                for (OutputSlot s : f.getOutputSlots()) {
+                                    for (Connection c : s.getConnections()) {
+                                        if (c.getInputSlot().getFigure() == succ) {
+                                            oldSlot = s;
+                                        }
+                                    }
+                                }
+
+                                assert oldSlot != null;
+
+                                OutputSlot nextSlot = succ.getOutputSlots().get(0);
+                                int pos = 0;
+                                if (succ.getProperties().get("con") != null) {
+                                    pos = Integer.parseInt(succ.getProperties().get("con"));
+                                }
+                                OutputSlot slot = f.createOutputSlot(pos);
+                                slot.getSource().addSourceNodes(succ.getSource());
+                                if (r.getShortProperty() != null) {
+                                    String s = succ.getProperties().get(r.getShortProperty());
+                                    if (s != null && s.length() > 0) {
+                                        slot.setShortName(s);
+                                        slot.setText(s);
+                                        slot.setColor(succ.getColor());
+                                    }
+                                } else {
+                                    slot.setText(succ.getProperties().get("dump_spec"));
+                                    if (succ.getProperties().get("short_name") != null) {
+                                        slot.setShortName(succ.getProperties().get("short_name"));
+                                    } else {
+                                        String s = succ.getProperties().get("dump_spec");
+                                        if (s != null && s.length() <= 2) {
+                                            slot.setShortName(s);
+                                        } else {
+                                            String tmpName = succ.getProperties().get("name");
+                                            if (tmpName != null && tmpName.length() > 0) {
+                                                slot.setShortName(tmpName.substring(0, 1));
+                                            }
+                                        }
+                                    }
+                                }
+                                for (Connection c : nextSlot.getConnections()) {
+                                    Connection newConn = diagram.createConnection(c.getInputSlot(), slot, c.getLabel());
+                                    newConn.setColor(c.getColor());
+                                    newConn.setStyle(c.getStyle());
+                                }
+
+
+                                figuresToRemove.add(succ);
+
+                                if (oldSlot.getConnections().size() == 0) {
+                                    f.removeSlot(oldSlot);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            diagram.removeAllFigures(figuresToRemove);
+        }
+    }
+
+    public void addRule(CombineRule combineRule) {
+        rules.add(combineRule);
+    }
+
+    public static class CombineRule {
+
+        private PropertyMatcher first;
+        private PropertyMatcher second;
+        private boolean reversed;
+        private String shortProperty;
+
+        public CombineRule(PropertyMatcher first, PropertyMatcher second) {
+            this(first, second, false);
+
+        }
+
+        public CombineRule(PropertyMatcher first, PropertyMatcher second, boolean reversed) {
+            this(first, second, reversed, null);
+        }
+
+        public CombineRule(PropertyMatcher first, PropertyMatcher second, boolean reversed, String shortProperty) {
+            this.first = first;
+            this.second = second;
+            this.reversed = reversed;
+            this.shortProperty = shortProperty;
+        }
+
+        public boolean isReversed() {
+            return reversed;
+        }
+
+        public PropertyMatcher getFirstMatcher() {
+            return first;
+        }
+
+        public PropertyMatcher getSecondMatcher() {
+            return second;
+        }
+
+        public String getShortProperty() {
+            return shortProperty;
+        }
+    }
+}