Examples of org.drools.util.LinkedList

org.drools.util.LinkedList
This is a simple linked linked implementation. Each node must implement LinkedListNodeso that it references the node before and after it. This way a node can be removed without having to scan the list to find it. This class does not provide an Iterator implementation as its designed for efficiency and not genericity. There are a number of ways to iterate the list. Simple iterator: for ( LinkedListNode node = list.getFirst(); node != null; node = node.getNext() ) { } Iterator that pops the first entry: for ( LinkedListNode node = list.removeFirst(); node != null; node = list.removeFirst() ) { } @author Mark Proctor @author Bob McWhirter



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231                                           final FieldExtractor fieldExtractor) {
        FieldIndex fieldIndex = null;


        // is linkedlist null, if so create and add
        if ( this.hashedFieldIndexes == null ) {
            this.hashedFieldIndexes = new LinkedList();
            fieldIndex = new FieldIndex( index,
                                         fieldExtractor );
            this.hashedFieldIndexes.add( fieldIndex );
        }


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112                             final PropagationContext context,
                            final InternalWorkingMemory workingMemory) {
        final FromMemory memory = (FromMemory) workingMemory.getNodeMemory( this );


        memory.betaMemory.getTupleMemory().add( leftTuple );
        final LinkedList list = new LinkedList();
        this.betaConstraints.updateFromTuple( memory.betaMemory.getContext(),
                                              workingMemory,
                                              leftTuple );


        for ( final java.util.Iterator it = this.dataProvider.getResults( leftTuple,
                                                                          workingMemory,
                                                                          context,
                                                                          memory.providerContext ); it.hasNext(); ) {
            final Object object = it.next();




            if ( this.alphaConstraints != null ) {
                // First alpha node filters
                boolean isAllowed = true;
                for ( int i = 0, length = this.alphaConstraints.length; i < length; i++ ) {
                    if ( !this.alphaConstraints[i].isAllowed( object,
                                                              workingMemory,
                                                              memory.alphaContexts[i] ) ) {
                        // next iteration
                        isAllowed = false;
                        break;
                    }
                }
                if ( !isAllowed ) {
                    continue;
                }
            }


            if ( this.betaConstraints.isAllowedCachedLeft( memory.betaMemory.getContext(),
                                                           object ) ) {
                final InternalFactHandle handle = workingMemory.getFactHandleFactory().newFactHandle( object );


                list.add( new LinkedListEntry( handle ) );


                this.sink.propagateAssertTuple( leftTuple,
                                                handle,
                                                context,
                                                workingMemory );
            }
        }


        this.betaConstraints.resetTuple( memory.betaMemory.getContext() );


        if ( !list.isEmpty() ) {
            memory.betaMemory.getCreatedHandles().put( leftTuple,
                                                       list );
        }


    }

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133 
        if ( tuple == null ) {
            return;
        }


        final LinkedList list = (LinkedList) memory.betaMemory.getCreatedHandles().remove( tuple );
        // if tuple was propagated
        if ( list != null ) {
            for ( LinkedListEntry entry = (LinkedListEntry) list.getFirst(); entry != null; entry = (LinkedListEntry) entry.getNext() ) {
                final InternalFactHandle handle = (InternalFactHandle) entry.getObject();
                this.sink.propagateRetractTuple( leftTuple,
                                                 handle,
                                                 context,
                                                 workingMemory );

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        final FromMemory memory = (FromMemory) workingMemory.getNodeMemory( this );


        final Iterator tupleIter = memory.betaMemory.getTupleMemory().iterator();
        for ( ReteTuple tuple = (ReteTuple) tupleIter.next(); tuple != null; tuple = (ReteTuple) tupleIter.next() ) {
            final LinkedList list = (LinkedList) memory.betaMemory.getCreatedHandles().remove( tuple );
            if ( list == null ) {
                continue;
            }
            for ( LinkedListEntry entry = (LinkedListEntry) list.getFirst(); entry != null; entry = (LinkedListEntry) entry.getNext() ) {
                final InternalFactHandle handle = (InternalFactHandle) entry.getObject();
                this.sink.propagateAssertTuple( tuple,
                                                handle,
                                                context,
                                                workingMemory );

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107             throw new RuntimeException( "cannot have null constraints, must atleast be an instanceof EmptyBetaCosntraints" );
        }
    }


    public BetaNodeFieldConstraint[] getConstraints() {
        final LinkedList constraints = this.constraints.getConstraints();


        final BetaNodeFieldConstraint[] array = new BetaNodeFieldConstraint[constraints.size()];
        int i = 0;
        for ( LinkedListEntry entry = (LinkedListEntry) constraints.getFirst(); entry != null; entry = (LinkedListEntry) entry.getNext() ) {
            array[i++] = (BetaNodeFieldConstraint) entry.getObject();
        }
        return array;
    }

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343 
    /* (non-Javadoc)
     * @see org.drools.common.BetaNodeConstraints#getConstraints()
     */
    public LinkedList getConstraints() {
        final LinkedList list = new LinkedList();
        list.add( new LinkedListEntry( this.constraint0 ) );
        list.add( new LinkedListEntry( this.constraint1 ) );
        list.add( new LinkedListEntry( this.constraint2 ) );
        list.add( new LinkedListEntry( this.constraint3 ) );
        return list;
    }
 

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17 
    private final LinkedList list;


    public ActivationGroupImpl(final String name) {
        this.name = name;
        this.list = new LinkedList();
    }

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61      * @param name
     *      The RuleFlowGroup name.
     */
    public RuleFlowGroupImpl(final String name) {
        this.name = name;
        this.list = new LinkedList();
    }
 

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173         return "[Activation rule=" + this.rule.getName() + ", tuple=" + this.tuple + "]";
    }


    public void addLogicalDependency(final LogicalDependency node) {
        if ( this.justified == null ) {
            this.justified = new LinkedList();
        }


        this.justified.add( node );
    }

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122         
        if ( seq > this.lastIndex ) {
            this.lastIndex = seq;
        }
        
        LinkedList list = this.array[seq];
        if ( list == null ) {
            list = new LinkedList();
            this.array[item.getSequenence()] = list;
        }
        
        list.add( new LinkedListEntry( activation ) );
    }

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Related Classes of org.drools.util.LinkedList

org.drools.common.ActivationGroupImpl
org.drools.common.AgendaItem
org.drools.common.ArrayAgendaGroup
org.drools.common.DefaultBetaConstraints
org.drools.common.DoubleBetaConstraints
org.drools.common.EmptyBetaConstraints
org.drools.common.QuadroupleBetaConstraints
org.drools.common.RuleFlowGroupImpl
org.drools.common.ScheduledAgendaItem
org.drools.common.SimpleAgendaGroup



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