Package org.eclipse.viatra.addon.databinding.runtime.api

## Class ViatraObservables

- java.lang.Object
- - org.eclipse.viatra.addon.databinding.runtime.api.ViatraObservables

-     public final class ViatraObservables
      extends java.lang.Object

  Utility class for observing VIATRA Query related objects, such as match sets, match parameters.

- - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static java.lang.String` | `OBSERVABLEVALUE_ANNOTATION` |

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `static java.util.Map<java.lang.String,​ObservableDefinition>` | `calculateObservableValues​(IQuerySpecification<?> query)` | Calculates the list of `ObservableDefinition`s from a query.
    `static org.eclipse.core.databinding.observable.value.IObservableValue` | `getObservableLabelFeature​(IPatternMatch match, java.lang.String expression)` | Returns an `IObservableValue` that observes the pattern match and converts it to the given expression.
    `static org.eclipse.core.databinding.observable.value.IObservableValue` | `getObservableLabelFeature​(IPatternMatch match, java.lang.String expression, java.lang.Object container)` | Returns an `IObservableValue` that observes the pattern match and converts it to the given expression.
    `static org.eclipse.core.databinding.observable.value.IObservableValue` | `getObservableValue​(IPatternMatch match, java.lang.String expression)` | Returns an IObservableValue for the given match based on the given expression.
    `static java.util.List<org.eclipse.core.databinding.observable.value.IObservableValue>` | `observeAllAttributes​(org.eclipse.core.databinding.observable.value.IValueChangeListener changeListener, java.lang.Object object)` | Registers the given change listener on the given object's all accessible fields.
    `static java.util.List<org.eclipse.core.databinding.observable.value.IObservableValue>` | `observeFeatures​(IPatternMatch match, org.eclipse.core.databinding.observable.value.IValueChangeListener changeListener, java.lang.String message)` | Registers the given changeListener for the appropriate features of the given signature.
    `static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.list.IObservableList` | `observeMatchesAsList​(Matcher matcher)` | Create an observable list of the match set of the given `ViatraQueryMatcher`.
    `static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.list.IObservableList` | `observeMatchesAsList​(IQuerySpecification<Matcher> querySpecification, ViatraQueryEngine engine)` | Create an observable list of the match set of the given query using a selected `ViatraQueryEngine`.
    `static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.list.IObservableList` | `observeMatchesAsList​(IQuerySpecification<Matcher> querySpecification, ViatraQueryEngine engine, Match filter)` | Create an observable list of the match set of the given query using a selected `ViatraQueryEngine`.
    `static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.set.IObservableSet` | `observeMatchesAsSet​(Matcher matcher)` | Create an observable set of the match set of the given `ViatraQueryMatcher`.
    `static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.set.IObservableSet` | `observeMatchesAsSet​(IQuerySpecification<Matcher> querySpecification, ViatraQueryEngine engine)` | Create an observable set of the match set of the given query using a selected `ViatraQueryEngine`.
    `static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.set.IObservableSet` | `observeMatchesAsSet​(IQuerySpecification<Matcher> querySpecification, ViatraQueryEngine engine, Match filter)` | Create an observable set of the match set of the given query using a selected `ViatraQueryEngine`.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### OBSERVABLEVALUE_ANNOTATION

          public static final java.lang.String OBSERVABLEVALUE_ANNOTATION

      See Also:
        Constant Field Values

  - ### Method Detail

    - #### observeMatchesAsList

          public static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.list.IObservableList observeMatchesAsList​(Matcher matcher)

      Create an observable list of the match set of the given `ViatraQueryMatcher`.

      The matches are ordered by appearance, so a new match is always put on the end of the list.

      Parameters:
        `matcher` - the matcher to observe
      Returns:
        an observable list of matches

    - #### observeMatchesAsList

          public static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.list.IObservableList observeMatchesAsList​(IQuerySpecification<Matcher> querySpecification,
                                                                                                                                                                                        ViatraQueryEngine engine)

      Create an observable list of the match set of the given query using a selected `ViatraQueryEngine`.

      The matches are ordered by appearance, so a new match is always put on the end of the list.

      Use the generated query specifications for initialization, in the generic case, you may have to accept an unchecked invocation (or use the Generic classes if you are sure).

      Parameters:
        `querySpecification` - the matcher querySpecification for the query to observe
        `engine` - the engine used with the matcher
      Returns:
        an observable list of matches

    - #### observeMatchesAsList

          public static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.list.IObservableList observeMatchesAsList​(IQuerySpecification<Matcher> querySpecification,
                                                                                                                                                                                        ViatraQueryEngine engine,
                                                                                                                                                                                        Match filter)

      Create an observable list of the match set of the given query using a selected `ViatraQueryEngine`.

      The matches are ordered by appearance, so a new match is always put on the end of the list.

      Use the generated query specifications for initialization, in the generic case, you may have to accept an unchecked invocation (or use the Generic classes if you are sure).

      Parameters:
        `querySpecification` - the matcher querySpecification for the query to observe
        `engine` - the engine used with the matcher
        `filter` - the partial match to be used as filter
      Returns:
        an observable list of matches

    - #### observeMatchesAsSet

          public static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.set.IObservableSet observeMatchesAsSet​(Matcher matcher)

      Create an observable set of the match set of the given `ViatraQueryMatcher`.
      Parameters:
        `matcher` - the matcher to observe
      Returns:
        an observable list of matches

    - #### observeMatchesAsSet

          public static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.set.IObservableSet observeMatchesAsSet​(IQuerySpecification<Matcher> querySpecification,
                                                                                                                                                                                     ViatraQueryEngine engine)

      Create an observable set of the match set of the given query using a selected `ViatraQueryEngine`.

      Use the generated query specifications for initialization, in the generic case, you may have to accept an unchecked invocation (or use the Generic classes if you are sure).

      Parameters:
        `querySpecification` - the matcher querySpecification for the query to observe
        `engine` - the engine used with the matcher
      Returns:
        an observable set of matches

    - #### observeMatchesAsSet

          public static <Match extends IPatternMatch,​Matcher extends ViatraQueryMatcher<Match>> org.eclipse.core.databinding.observable.set.IObservableSet observeMatchesAsSet​(IQuerySpecification<Matcher> querySpecification,
                                                                                                                                                                                     ViatraQueryEngine engine,
                                                                                                                                                                                     Match filter)

      Create an observable set of the match set of the given query using a selected `ViatraQueryEngine`.

      Use the generated query specifications for initialization, in the generic case, you may have to accept an unchecked invocation (or use the Generic classes if you are sure).

      Parameters:
        `querySpecification` - the matcher querySpecification for the query to observe
        `engine` - the engine used with the matcher
        `filter` - the partial match to be used as filter
      Returns:
        an observable set of matches

    - #### observeFeatures

          public static java.util.List<org.eclipse.core.databinding.observable.value.IObservableValue> observeFeatures​(IPatternMatch match,
                                                                                                                       org.eclipse.core.databinding.observable.value.IValueChangeListener changeListener,
                                                                                                                       java.lang.String message)

      Registers the given changeListener for the appropriate features of the given signature. The features will be computed based on the message parameter.
      Parameters:
        `match` -
        `changeListener` - the change listener
        `message` - the message which can be found in the appropriate PatternUI annotation
      Returns:
        the list of IObservableValue instances for which the IValueChangeListener was registered

    - #### observeAllAttributes

          public static java.util.List<org.eclipse.core.databinding.observable.value.IObservableValue> observeAllAttributes​(org.eclipse.core.databinding.observable.value.IValueChangeListener changeListener,
                                                                                                                            java.lang.Object object)

      Registers the given change listener on the given object's all accessible fields. This function uses Java Reflection.
      Parameters:
        `changeListener` - the change listener
        `object` - the observed object
      Returns:
        the list of IObservableValue instances for which the IValueChangeListener was registered

    - #### getObservableValue

          public static org.eclipse.core.databinding.observable.value.IObservableValue getObservableValue​(IPatternMatch match,
                                                                                                          java.lang.String expression)

      Returns an IObservableValue for the given match based on the given expression. If an attribute is not present in the expression than it tries with the 'name' attribute. If it is not present the returned value will be null.
      Parameters:
        `match` - the match object
        `expression` - the expression
      Returns:
        IObservableValue instance or null

    - #### getObservableLabelFeature

          public static org.eclipse.core.databinding.observable.value.IObservableValue getObservableLabelFeature​(IPatternMatch match,
                                                                                                                 java.lang.String expression)

      Returns an `IObservableValue` that observes the pattern match and converts it to the given expression.

    - #### getObservableLabelFeature

          public static org.eclipse.core.databinding.observable.value.IObservableValue getObservableLabelFeature​(IPatternMatch match,
                                                                                                                 java.lang.String expression,
                                                                                                                 java.lang.Object container)

      Returns an `IObservableValue` that observes the pattern match and converts it to the given expression. The given container is also stored in the created `ObservableLabelFeature`.

    - #### calculateObservableValues

          public static java.util.Map<java.lang.String,​ObservableDefinition> calculateObservableValues​(IQuerySpecification<?> query)

      Calculates the list of `ObservableDefinition`s from a query.
      Parameters:
        `query` -