org.eclipse.aether.util.graph.visitor

## Class FilteringDependencyVisitor

- java.lang.Object
- - org.eclipse.aether.util.graph.visitor.FilteringDependencyVisitor

- All Implemented Interfaces:
    DependencyVisitor

      public final class FilteringDependencyVisitor
      extends Object
      implements DependencyVisitor

  A dependency visitor that delegates to another visitor if nodes match a filter. Note that in case of a mismatching node, the children of that node are still visisted and presented to the filter.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `FilteringDependencyVisitor(DependencyVisitor visitor, DependencyFilter filter)` Creates a new visitor that delegates traversal of nodes matching the given filter to the specified visitor.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `DependencyFilter` | `getFilter()` Gets the filter being applied before delegation.
    `DependencyVisitor` | `getVisitor()` Gets the visitor to which this visitor delegates to.
    `boolean` | `visitEnter(DependencyNode node)` Notifies the visitor of a node visit before its children have been processed.
    `boolean` | `visitLeave(DependencyNode node)` Notifies the visitor of a node visit after its children have been processed.

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

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

- - ### Constructor Detail

    - #### FilteringDependencyVisitor

          public FilteringDependencyVisitor(DependencyVisitor visitor,
                                    DependencyFilter filter)

      Creates a new visitor that delegates traversal of nodes matching the given filter to the specified visitor.
      Parameters:
        `visitor` - The visitor to delegate to, must not be `null`.
        `filter` - The filter to apply, may be `null` to not filter.

  - ### Method Detail

    - #### getVisitor

          public DependencyVisitor getVisitor()

      Gets the visitor to which this visitor delegates to.
      Returns:
        The visitor being delegated to, never `null`.

    - #### getFilter

          public DependencyFilter getFilter()

      Gets the filter being applied before delegation.
      Returns:
        The filter being applied or `null` if none.

    - #### visitEnter

          public boolean visitEnter(DependencyNode node)

      Description copied from interface: `DependencyVisitor`
      Notifies the visitor of a node visit before its children have been processed.
      Specified by:
        `visitEnter` in interface `DependencyVisitor`
      Parameters:
        `node` - The dependency node being visited, must not be `null`.
      Returns:
        `true` to visit child nodes of the specified node as well, `false` to skip children.

    - #### visitLeave

          public boolean visitLeave(DependencyNode node)

      Description copied from interface: `DependencyVisitor`
      Notifies the visitor of a node visit after its children have been processed. Note that this method is always invoked regardless whether any children have actually been visited.
      Specified by:
        `visitLeave` in interface `DependencyVisitor`
      Parameters:
        `node` - The dependency node being visited, must not be `null`.
      Returns:
        `true` to visit siblings nodes of the specified node as well, `false` to skip siblings.

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