Examples of org.drools.core.spi.Tuple

org.drools.core.spi.Tuple
Partial matches are propagated through the Rete network as Tuples. Each Tuple Is able to return the FactHandleImpl members of the partial match for the requested pattern. The pattern refers to the index position of the FactHandleImpl in the underlying implementation. @see FactHandle;


            public void evaluate(KnowledgeHelper drools,
                                 WorkingMemory workingMemory) throws ConsequenceException {
                try {
                    RuleImpl rule = drools.getRule();
                    Tuple tuple = drools.getTuple();


                    Context context = (Context) drools.get( contextDeclaration );
                    context.setState( Context.PRINT_RESULTS );


                    drools.update( tuple.get( contextDeclaration ),
                                   context );


                    //                    System.err.println( "We Are Done!!!" );
                } catch ( Exception e ) {
                    throw new ConsequenceException( e );

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            public void evaluate(KnowledgeHelper drools,
                                 WorkingMemory workingMemory) throws ConsequenceException {
                try {
                    RuleImpl rule = drools.getRule();
                    Tuple tuple = drools.getTuple();


                    Context context = (Context) drools.get( contextDeclaration );
                    context.setState( Context.ASSIGN_SEATS );


                    drools.update( tuple.get( contextDeclaration ),
                                   context );


                    //System.err.println( "continue processing" );
                } catch ( Exception e ) {
                    e.printStackTrace();

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                              workingMemory );


        final List asserted = sink.getAsserted();
        assertEquals( 1,
                      asserted.size() );
        Tuple tuple = (Tuple) ((Object[]) asserted.get( 0 ))[0];
        assertSame( person2,
                    tuple.toFactHandles()[0].getObject() );
        assertSame( cheese1,
                    tuple.toFactHandles()[1].getObject() );


        cheese2.setType( "stilton" );
        final Person person3 = new Person( "xxx2",
                                           30 );
        final FactHandle person3Handle = workingMemory.insert( person3 );
        final LeftTuple tuple3 = new LeftTupleImpl( (DefaultFactHandle) person3Handle,
                                                    from,
                                                    true );
        from.assertLeftTuple( tuple3,
                              context,
                              workingMemory );


        assertEquals( 3,
                      asserted.size() );
        tuple = (Tuple) ((Object[]) asserted.get( 1 ))[0];
        assertSame( person3,
                    tuple.toFactHandles()[0].getObject() );
        assertSame( cheese1,
                    tuple.toFactHandles()[1].getObject() );
        tuple = (Tuple) ((Object[]) asserted.get( 2 ))[0];
        assertSame( person3,
                    tuple.toFactHandles()[0].getObject() );
        assertSame( cheese2,
                    tuple.toFactHandles()[1].getObject() );


        assertNotSame( cheese1,
                       cheese2 );
    }

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                              workingMemory );


        final List asserted = sink.getAsserted();
        assertEquals( 1,
                      asserted.size() );
        Tuple tuple = (Tuple) ((Object[]) asserted.get( 0 ))[0];
        assertSame( person2,
                    tuple.toFactHandles()[0].getObject() );
        assertSame( cheese1,
                    tuple.toFactHandles()[1].getObject() );


        cheese2.setPrice( 30 );
        final Person person3 = new Person( "xxx2",
                                           30 );
        final FactHandle person3Handle = workingMemory.insert( person3 );
        final LeftTuple tuple3 = new LeftTupleImpl( (DefaultFactHandle) person3Handle,
                                                    from,
                                                    true );
        from.assertLeftTuple( tuple3,
                              context,
                              workingMemory );


        assertEquals( 3,
                      asserted.size() );
        tuple = (Tuple) ((Object[]) asserted.get( 1 ))[0];
        assertSame( person3,
                    tuple.toFactHandles()[0].getObject() );
        assertSame( cheese1,
                    tuple.toFactHandles()[1].getObject() );
        tuple = (Tuple) ((Object[]) asserted.get( 2 ))[0];
        assertSame( person3,
                    tuple.toFactHandles()[0].getObject() );
        assertSame( cheese2,
                    tuple.toFactHandles()[1].getObject() );


        assertNotSame( cheese1,
                       cheese2 );
    }

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     * @param activation The activation from which the declarations should be extracted
     * @return A String represetation of the declarations of the activation.
     */
    private String extractDeclarations(final Activation activation,  final WorkingMemory workingMemory) {
        final StringBuilder result = new StringBuilder();
        final Tuple tuple = activation.getTuple();
        final Map<?, ?> declarations = activation.getSubRule().getOuterDeclarations();
        for ( Iterator<?> it = declarations.values().iterator(); it.hasNext(); ) {
            final Declaration declaration = (Declaration) it.next();
            final FactHandle handle = tuple.get( declaration );
            if ( handle instanceof InternalFactHandle ) {
                final InternalFactHandle handleImpl = (InternalFactHandle) handle;
                if ( handleImpl.getId() == -1 ) {
                    // This handle is now invalid, probably due to an fact retraction
                    continue;

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     * @return A unique id for the activation
     */
    private static String getActivationId(final Activation activation) {
        final StringBuilder result = new StringBuilder( activation.getRule().getName() );
        result.append( " [" );
        final Tuple tuple = activation.getTuple();
        final FactHandle[] handles = tuple.toFactHandles();
        for ( int i = 0; i < handles.length; i++ ) {
            result.append( ((InternalFactHandle) handles[i]).getId() );
            if ( i < handles.length - 1 ) {
                result.append( ", " );
            }

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     * @param activation The activation from which the declarations should be extracted
     * @return A String represetation of the declarations of the activation.
     */
    private String extractDeclarations(final Activation activation,  final WorkingMemory workingMemory) {
        final StringBuilder result = new StringBuilder();
        final Tuple tuple = activation.getTuple();
        final Map<?, ?> declarations = activation.getSubRule().getOuterDeclarations();
        for ( Iterator<?> it = declarations.values().iterator(); it.hasNext(); ) {
            final Declaration declaration = (Declaration) it.next();
            final FactHandle handle = tuple.get( declaration );
            if ( handle instanceof InternalFactHandle ) {
                final InternalFactHandle handleImpl = (InternalFactHandle) handle;
                if ( handleImpl.getId() == -1 ) {
                    // This handle is now invalid, probably due to an fact retraction
                    continue;

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     * @return A unique id for the activation
     */
    private static String getActivationId(final Activation activation) {
        final StringBuilder result = new StringBuilder( activation.getRule().getName() );
        result.append( " [" );
        final Tuple tuple = activation.getTuple();
        final FactHandle[] handles = tuple.toFactHandles();
        for ( int i = 0; i < handles.length; i++ ) {
            result.append( ((InternalFactHandle) handles[i]).getId() );
            if ( i < handles.length - 1 ) {
                result.append( ", " );
            }

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