Examples of org.eclipse.core.databinding.observable.value.IObservableValue

Package org.eclipse.core.databinding.observable.value

Examples of org.eclipse.core.databinding.observable.value.IObservableValue

org.eclipse.core.databinding.observable.value.IObservableValue
A value whose changes can be tracked by value change listeners. @noimplement This interface is not intended to be implemented by clients.Clients should instead subclass one of the classes that implement this interface. Note that direct implementers of this interface outside of the framework will be broken in future releases when methods are added to this interface. @see AbstractObservableValue @since 1.0

    super.dispose();
  }


  private void removeElementChangeListener() {
    for (Iterator it = dependencies.iterator(); it.hasNext();) {
      IObservableValue observableValue = (IObservableValue) it.next();
      observableValue.removeChangeListener(markDirtyChangeListener);
    }
  }

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    Object masterValue = masterProperty.getValue(source);
    detailProperty.updateMap(masterValue, diff);
  }


  public IObservableMap observe(Realm realm, Object source) {
    IObservableValue masterValue;


    ObservableTracker.setIgnore(true);
    try {
      masterValue = masterProperty.observe(realm, source);
    } finally {

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    PropertyObservableUtil.cascadeDispose(detailMap, masterValue);
    return detailMap;
  }


  public IObservableMap observeDetail(IObservableValue master) {
    IObservableValue masterValue;


    ObservableTracker.setIgnore(true);
    try {
      masterValue = masterProperty.observeDetail(master);
    } finally {

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      // For added master values, we set up a new detail observable.
      addDetailObservable(addedKey);


      // Get the value of the created detail observable for the new diff.
      IObservableValue detailValue = getDetailObservableValue(addedKey);
      newValues.put(addedKey, detailValue.getValue());
    }


    // Handle removed master values.
    Set removedKeys = diff.getRemovedKeys();
    for (Iterator iter = removedKeys.iterator(); iter.hasNext();) {
      Object removedKey = iter.next();


      // First of all, get the current detail value and add it to the set
      // of old values of the new diff.
      IObservableValue detailValue = getDetailObservableValue(removedKey);
      oldValues.put(removedKey, detailValue.getValue());


      // For removed master values, we dispose the detail observable.
      removeDetailObservable(removedKey);
    }


    // Handle changed master values.
    Set changedKeys = diff.getChangedKeys();
    for (Iterator iter = changedKeys.iterator(); iter.hasNext();) {
      Object changedKey = iter.next();


      // Get the detail value prior to the change and add it to the set of
      // old values of the new diff.
      IObservableValue oldDetailValue = getDetailObservableValue(changedKey);
      oldValues.put(changedKey, oldDetailValue.getValue());


      // Remove the old detail value for the old master value and add it
      // again for the new master value.
      removeDetailObservable(changedKey);
      addDetailObservable(changedKey);


      // Get the new detail value and add it to the set of new values.
      IObservableValue newDetailValue = getDetailObservableValue(changedKey);
      newValues.put(changedKey, newDetailValue.getValue());
    }


    // The different key sets are the same, only the values change.
    fireMapChange(Diffs.createMapDiff(addedKeys, removedKeys, changedKeys,
        oldValues, newValues));

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  }


  private void addDetailObservable(final Object addedKey) {
    Object masterElement = masterMap.get(addedKey);


    IObservableValue detailValue = (IObservableValue) keyDetailMap
        .get(addedKey);


    if (detailValue == null) {
      detailValue = createDetailObservable(masterElement);


      keyDetailMap.put(addedKey, detailValue);


      detailValue.addValueChangeListener(new IValueChangeListener() {
        public void handleValueChange(ValueChangeEvent event) {
          if (!event.getObservableValue().isStale()) {
            staleDetailObservables.remove(event.getSource());
          }


          fireMapChange(Diffs.createMapDiffSingleChange(addedKey,
              event.diff.getOldValue(), event.diff.getNewValue()));
        }
      });


      if (detailValue.isStale()) {
        addStaleDetailObservable(detailValue);
      }
    }


    detailValue.addStaleListener(detailStaleListener);
  }

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  private void removeDetailObservable(Object removedKey) {
    if (isDisposed()) {
      return;
    }


    IObservableValue detailValue = (IObservableValue) keyDetailMap
        .remove(removedKey);
    staleDetailObservables.remove(detailValue);
    detailValue.dispose();
  }

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    if (!containsKey(key)) {
      return null;
    }


    IObservableValue detailValue = getDetailObservableValue(key);
    return detailValue.getValue();
  }

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  public Object put(Object key, Object value) {
    if (!containsKey(key)) {
      return null;
    }


    IObservableValue detailValue = getDetailObservableValue(key);
    Object oldValue = detailValue.getValue();
    detailValue.setValue(value);
    return oldValue;
  }

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    if (!containsKey(key)) {
      return null;
    }


    IObservableValue detailValue = getDetailObservableValue(key);
    Object oldValue = detailValue.getValue();


    masterMap.remove(key);


    return oldValue;
  }

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    }


    if (keyDetailMap != null) {
      for (Iterator iter = keyDetailMap.values().iterator(); iter
          .hasNext();) {
        IObservableValue detailValue = (IObservableValue) iter.next();
        detailValue.dispose();
      }
      keyDetailMap.clear();
    }


    masterMap = null;

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