org.eclipse.rdf4j.rio.helpers

## Class AbstractRDFHandler

- java.lang.Object
- - org.eclipse.rdf4j.rio.helpers.AbstractRDFHandler

- All Implemented Interfaces:
    RDFHandler
  Direct Known Subclasses:
    AbstractRDFInserter, ContextStatementCollector, DAWGTestBooleanParser, DAWGTestResultSetParser, RDFHandlerBase, RDFRemover, VerificationListener

      public abstract class AbstractRDFHandler
      extends Object
      implements RDFHandler

  Base class for `RDFHandler`s with dummy implementations of all methods.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbstractRDFHandler()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `endRDF()` Signals the end of the RDF data.
    `void` | `handleComment(String comment)` Handles a comment.
    `void` | `handleNamespace(String prefix, String uri)` Handles a namespace declaration/definition.
    `void` | `handleStatement(Statement st)` Handles a statement.
    `void` | `startRDF()` Signals the start of the RDF data.

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

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

- - ### Constructor Detail

    - #### AbstractRDFHandler

          public AbstractRDFHandler()

  - ### Method Detail

    - #### startRDF

          public void startRDF()
                        throws RDFHandlerException

      Description copied from interface: `RDFHandler`
      Signals the start of the RDF data. This method is called before any data is reported.
      Specified by:
        `startRDF` in interface `RDFHandler`
      Throws:
        `RDFHandlerException` - If the RDF handler has encountered an unrecoverable error.

    - #### endRDF

          public void endRDF()
                      throws RDFHandlerException

      Description copied from interface: `RDFHandler`
      Signals the end of the RDF data. This method is called when all data has been reported.
      Specified by:
        `endRDF` in interface `RDFHandler`
      Throws:
        `RDFHandlerException` - If the RDF handler has encountered an unrecoverable error.

    - #### handleNamespace

          public void handleNamespace(String prefix,
                                      String uri)
                               throws RDFHandlerException

      Description copied from interface: `RDFHandler`
      Handles a namespace declaration/definition. A namespace declaration associates a (short) prefix string with the namespace's URI. The prefix for default namespaces, which do not have an associated prefix, are represented as empty strings.
      Specified by:
        `handleNamespace` in interface `RDFHandler`
      Parameters:
        `prefix` - The prefix for the namespace, or an empty string in case of a default namespace.
        `uri` - The URI that the prefix maps to.
      Throws:
        `RDFHandlerException` - If the RDF handler has encountered an unrecoverable error.

    - #### handleStatement

          public void handleStatement(Statement st)
                               throws RDFHandlerException

      Description copied from interface: `RDFHandler`
      Handles a statement.
      Specified by:
        `handleStatement` in interface `RDFHandler`
      Parameters:
        `st` - The statement.
      Throws:
        `RDFHandlerException` - If the RDF handler has encountered an unrecoverable error.

    - #### handleComment

          public void handleComment(String comment)
                             throws RDFHandlerException

      Description copied from interface: `RDFHandler`
      Handles a comment.
      Specified by:
        `handleComment` in interface `RDFHandler`
      Parameters:
        `comment` - The comment.
      Throws:
        `RDFHandlerException` - If the RDF handler has encountered an unrecoverable error.

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