gerrit.simantics Code Review - simantics/platform.git/blob

   1 package org.simantics.structural.synchronization.base;
   2
   3 import gnu.trove.map.hash.THashMap;
   4 import gnu.trove.procedure.TObjectObjectProcedure;
   5 import gnu.trove.procedure.TObjectProcedure;
   6 import gnu.trove.set.hash.THashSet;
   7
   8 import java.io.PrintWriter;
   9 import java.util.Map;
  10
  11 /**
  12  * The entry point to the mapping structure between Simantics database and a
  13  * designated solver. It is used to synchronize changes from Simantics to the
  14  * solver.
  15  *
  16  * @author Hannu Niemist&ouml;
  17  */
  18 abstract public class MappingBase<T extends ComponentBase<T>> {
  19
  20         abstract public T getConfiguration();
  21
  22     /**
  23      * Set of all components indexed by their UID.
  24      */
  25     transient protected THashMap<String, T> configurationByUid;
  26
  27     /**
  28      * Set of all components indexed by their solver name.
  29      */
  30     transient protected Map<String, T> configurationBySolverName;
  31
  32     /**
  33      * Set of components whose removal is delayed because they might
  34      * have been moved somewhere else.
  35      */
  36     transient THashSet<T> pendingRemoval = new THashSet<T>();
  37
  38     /**
  39      * This is a structure that is used to return the state of the removed modules
  40      * when the removal is undone.
  41      */
  42     public transient StateUndoContextBase undoContext;
  43
  44     public transient ComponentFactory<T> componentFactory;
  45
  46     /**
  47      * The synchronization has processed all change sets before this change set
  48      * (excluding this change set).
  49      * It means that next synchronization operation should start examining changes
  50      * made in this revision and revisions after this.
  51      */
  52     public long currentRevision;
  53
  54     /**
  55      * Tells whether the uids in the components can be used
  56      * in the synchronization. This is normally true, but
  57      * may be set temporarily false when export/import:in
  58      * the model.
  59      */
  60     private boolean trustUids;
  61
  62     public MappingBase() {
  63         this(null, -1L, false);
  64     }
  65
  66     public MappingBase(T configuration, boolean trustUids) {
  67         this(configuration, -1L, trustUids);
  68     }
  69
  70     public MappingBase(T configuration, long currentRevision, boolean trustUids) {
  71         undoContext = createUndoContext();
  72         componentFactory = createComponentFactory();
  73         if(trustUids)
  74             createConfigurationById(configuration);
  75         this.currentRevision = currentRevision;
  76         this.trustUids = trustUids;
  77     }
  78
  79     abstract public StateUndoContextBase createUndoContext();
  80     abstract public ComponentFactory<T> createComponentFactory();
  81
  82     protected void createConfigurationById(T configuration) {
  83         THashMap<String, T> configurationByUid = new THashMap<String, T>();
  84         browseConfiguration(configurationByUid, configuration);
  85         this.configurationByUid = configurationByUid;
  86     }
  87
  88     private void browseConfiguration(
  89             THashMap<String, T> configurationByUid,
  90             T configuration) {
  91         configurationByUid.put(configuration.uid, configuration);
  92         for(T child : configuration.getChildren()) {
  93             browseConfiguration(configurationByUid, child);
  94             child.parent = configuration;
  95         }
  96     }
  97
  98     public Map<String, T> getConfigurationBySolverName() {
  99         Map<String, T> result = configurationBySolverName;
 100         if (result == null)
 101             result = configurationBySolverName = createConfigurationBySolverName(getConfiguration());
 102         return result;
 103     }
 104
 105     protected Map<String, T> createConfigurationBySolverName(T configuration) {
 106         THashMap<String, T> configurationBySolverName = new THashMap<>();
 107         browseConfigurationBySolverName(configurationBySolverName, configuration);
 108         return configurationBySolverName;
 109     }
 110
 111     private void browseConfigurationBySolverName(
 112             THashMap<String, T> configurationBySolverName,
 113             T configuration) {
 114         configurationBySolverName.put(configuration.solverComponentName, configuration);
 115         for(T child : configuration.getChildren()) {
 116             browseConfigurationBySolverName(configurationBySolverName, child);
 117             child.parent = configuration;
 118         }
 119     }
 120
 121     public T detachOrCreateComponent(String uid) {
 122         T result = configurationByUid.get(uid);
 123         if(result == null) {
 124             result = componentFactory.create(uid);
 125             configurationByUid.put(uid, result);
 126         }
 127         else {
 128             if(result.getParent() == null)
 129                 pendingRemoval.remove(result);
 130             else
 131                 result.getParent().detachByUid(uid);
 132         }
 133         return result;
 134     }
 135
 136     /**
 137      * Marks that the component should be removed. The actual removal
 138      * is delayed until the call of {@link #removePending} so that if the
 139      * component is not actually removed but moved or renamed, we don't lose
 140      * its state.
 141      */
 142     public void addPendingRemoval(T component) {
 143         pendingRemoval.add(component);
 144     }
 145
 146     public void printUidMap() {
 147         printUidMap(new PrintWriter(System.out));
 148     }
 149
 150     public void printUidMap(final PrintWriter out) {
 151         out.println("Component tree");
 152         out.print("    ");
 153         getConfiguration().printConfiguration(out, 1);
 154         if(configurationByUid != null) {
 155             out.println("UIDs");
 156             configurationByUid.forEachEntry(new TObjectObjectProcedure<String, T>() {
 157                 @Override
 158                 public boolean execute(String a, T b) {
 159                     out.println("    " + a + " (" + b.solverComponentName + ", " + b.componentId + ", " + b.uid + ")");
 160                     return true;
 161                 }
 162             });
 163         }
 164     }
 165
 166     /**
 167      * Removes the component recursively.
 168      */
 169     public void remove(final Solver solver, T component) {
 170         if(configurationByUid != null)
 171             configurationByUid.remove(component.uid);
 172         if (configurationBySolverName != null)
 173             configurationBySolverName.remove(component.solverComponentName);
 174         if(component.getChildMap() != null)
 175             component.getChildMap().forEachValue(new TObjectProcedure<T>() {
 176                 @Override
 177                 public boolean execute(T child) {
 178                     remove(solver, child);
 179                     return true;
 180                 }
 181             });
 182         if(component.componentId > 0 && !component.attached)
 183             solver.remove(component.componentId);
 184     }
 185
 186     /**
 187      * Saves undo state recursively
 188      */
 189     public void saveUndoState(final Solver solver, T component) {
 190         if(component.getChildMap() != null)
 191             component.getChildMap().forEachValue(new TObjectProcedure<T>() {
 192                 @Override
 193                 public boolean execute(T child) {
 194                     saveUndoState(solver, child);
 195                     return true;
 196                 }
 197             });
 198         else if(component.componentId > 0 && !component.attached)
 199             undoContext.saveState(solver, component.componentId, component.uid);
 200     }
 201
 202     /**
 203      * Removes components that are marked pending with {@link #addPendingRemoval} method.
 204      */
 205     public void removePending(final Solver solver) {
 206         pendingRemoval.forEach(new TObjectProcedure<T>() {
 207             @Override
 208             public boolean execute(T component) {
 209                 saveUndoState(solver, component);
 210                 return true;
 211             }
 212         });
 213         pendingRemoval.forEach(new TObjectProcedure<T>() {
 214             @Override
 215             public boolean execute(T component) {
 216                 remove(solver, component);
 217                 return true;
 218             }
 219         });
 220         pendingRemoval.clear();
 221     }
 222
 223     /**
 224      * Changes the {@link #trustUids} flag.
 225      */
 226     public void setTrustUids(boolean trustUids) {
 227         if(trustUids != this.trustUids) {
 228             this.trustUids = trustUids;
 229             if(trustUids) {
 230                 T configuration = getConfiguration();
 231                 if(configuration != null)
 232                     createConfigurationById(configuration);
 233             }
 234         }
 235         if(!trustUids)
 236             configurationByUid = null;
 237     }
 238
 239     public boolean getTrustUids() {
 240         return trustUids;
 241     }
 242
 243     public void dispose() {
 244         if (configurationByUid != null)
 245             configurationByUid.clear();
 246         if (configurationBySolverName != null) {
 247             configurationBySolverName.clear();
 248             configurationBySolverName = null;
 249         }
 250         pendingRemoval.clear();
 251     }
 252
 253     public boolean hasPendingRemovals() {
 254         return !pendingRemoval.isEmpty();
 255     }
 256
 257 }