Package org.drools.core.rule.constraint

Examples of org.drools.core.rule.constraint.MvelConstraint

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        final CompositeObjectSinkAdapter ad = new CompositeObjectSinkAdapter();
        InternalReadAccessor extractor = store.getReader( Cheese.class,
                                                          "type",
                                                          this.getClass().getClassLoader() );

        final MvelConstraint lit1 = new MvelConstraintTestUtil( "type == \"stilton\"",
                                                                new ObjectFieldImpl( "stilton" ),
                                                                new MockExtractor() );

        final AlphaNode al1 = new AlphaNode( buildContext.getNextId(),
                                             lit1,
                                             new MockObjectSource( buildContext.getNextId() ),
                                             buildContext );

        final MvelConstraint lit2 = new MvelConstraintTestUtil( "type == \"brie\"",
                new ObjectFieldImpl( "brie" ),
                new MockExtractor() );

        final AlphaNode al2 = new AlphaNode( buildContext.getNextId(),
                                             lit2,
                                             new MockObjectSource( buildContext.getNextId() ),
                                             buildContext );

        final MvelConstraint lit3 = new MvelConstraintTestUtil( "type == \"muzzarela\"",
                                                                new ObjectFieldImpl( "muzzarela" ),
                                                                new MockExtractor() );

        final AlphaNode al3 = new AlphaNode( buildContext.getNextId(),
                                             lit3,
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                "type",
                getClass().getClassLoader());

        final FieldValue field = FieldFactory.getInstance().getFieldValue( "cheddar" );

        final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", field, extractor);

        pattern.addConstraint( constraint );
        rule1.addPattern( pattern );

        rule1.setConsequence( new Consequence() {
            private static final long serialVersionUID = 510l;

            public void evaluate(final KnowledgeHelper knowledgeHelper,
                                 final WorkingMemory workingMemory) throws Exception {
            }

            public void readExternal(ObjectInput in) throws IOException,
                                                    ClassNotFoundException {

            }

            public void writeExternal(ObjectOutput out) throws IOException {

            }
           
            public String getName() {
                return "default";
            }
        } );

        final RuleImpl rule2 = new RuleImpl( "test2" );
        final ClassObjectType cheeseObjectType2 = new ClassObjectType( Cheese.class );
        final Pattern pattern2 = new Pattern( 0,
                                              cheeseObjectType2 );

        final FieldValue field2 = FieldFactory.getInstance().getFieldValue( "stilton" );

        final MvelConstraint constraint2 = new MvelConstraintTestUtil("type == \"stilton\"", field, extractor);

        pattern2.addConstraint( constraint2 );
        rule2.addPattern( pattern2 );

        rule2.setConsequence( new Consequence() {
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                "type",
                getClass().getClassLoader());

        final FieldValue field = FieldFactory.getInstance().getFieldValue( "cheddar" );

        final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", field, extractor);

        // With Memory
        final AlphaNode alphaNode = new AlphaNode( buildContext.getNextId(),
                                                   constraint,
                                                   source,
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                                                                "type",
                                                                getClass().getClassLoader() );

        final FieldValue field = FieldFactory.getInstance().getFieldValue( "cheddar" );

        final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", field, extractor);

        final AlphaNode alphaNode = new AlphaNode( buildContext.getNextId(),
                                                   constraint,
                                                   source,
                                                   buildContext );
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                                                                "type",
                                                                getClass().getClassLoader() );

        final FieldValue field = FieldFactory.getInstance().getFieldValue( "cheddar" );

        final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", field, extractor);

        final AlphaNode alphaNode = new AlphaNode( buildContext.getNextId(),
                                                   constraint,
                                                   source,
                                                   buildContext ); // no memory
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        final ClassFieldReader extractor = store.getReader(Cheese.class,
                "type",
                getClass().getClassLoader());

        final MvelConstraint constraint = new MvelConstraintTestUtil( "type == \"cheddar\"",
                                                                      FieldFactory.getInstance().getFieldValue( "cheddar" ),
                                                                      extractor );

        final ContextEntry context = constraint.createContextEntry();

        final Cheese cheddar = new Cheese( "cheddar",
                                           5 );

        final InternalFactHandle cheddarHandle = (InternalFactHandle) ksession.insert( cheddar );

        // check constraint
        assertTrue( constraint.isAllowed( cheddarHandle,
                                          ksession,
                                          context ) );

        final Cheese stilton = new Cheese( "stilton",
                                           5 );

        final InternalFactHandle stiltonHandle = (InternalFactHandle) ksession.insert( stilton );

        // check constraint
        assertFalse( constraint.isAllowed( stiltonHandle,
                                           ksession,
                                           context ) );
    }
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        final ClassFieldReader extractor = store.getReader(Cheese.class,
                "price",
                getClass().getClassLoader());

        final MvelConstraint constraint = new MvelConstraintTestUtil( "price == 5",
                                                                      FieldFactory.getInstance().getFieldValue( 5 ),
                                                                      extractor );
        final ContextEntry context = constraint.createContextEntry();

        final Cheese cheddar = new Cheese( "cheddar",
                                           5 );

        final InternalFactHandle cheddarHandle = (InternalFactHandle) ksession.insert( cheddar );

        // check constraint
        assertTrue( constraint.isAllowed( cheddarHandle,
                                          ksession,
                                          context ) );

        final Cheese stilton = new Cheese( "stilton",
                                           10 );

        final InternalFactHandle stiltonHandle = (InternalFactHandle) ksession.insert( stilton );

        // check constraint
        assertFalse(constraint.isAllowed(stiltonHandle,
                                         ksession,
                context));
    }
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                                                            "type",
                                                            getClass().getClassLoader() );

        final FieldValue field = FieldFactory.getInstance().getFieldValue( "cheddar" );

        final MvelConstraint constraint = new MvelConstraintTestUtil("type == \"cheddar\"", field, extractor);

        pattern.addConstraint( constraint );
        rule1.addPattern( pattern );

        rule1.setConsequence( new Consequence() {
            private static final long serialVersionUID = 510l;

            public void evaluate(final KnowledgeHelper knowledgeHelper,
                                 final WorkingMemory workingMemory) throws Exception {
            }

            public void readExternal(ObjectInput in) throws IOException,
                                                    ClassNotFoundException {

            }

            public void writeExternal(ObjectOutput out) throws IOException {

            }
           
            public String getName() {
                return "default";
            }
        } );

        final RuleImpl rule2 = new RuleImpl( "test2" );
        final ClassObjectType cheeseObjectType2 = new ClassObjectType( Cheese.class );
        final Pattern pattern2 = new Pattern( 0,
                                              cheeseObjectType2 );

        final FieldValue field2 = FieldFactory.getInstance().getFieldValue( "stilton" );

        final MvelConstraint constraint2 = new MvelConstraintTestUtil("type == \"stilton\"", field, extractor);

        pattern2.addConstraint( constraint2 );
        rule2.addPattern( pattern2 );

        rule2.setConsequence( new Consequence() {
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     * @see org.drools.core.reteoo.BaseNodeVertex#getHtml()
     */
    public String getHtml() {
        AlphaNodeFieldConstraint constraint = this.node.getConstraint();
        if (constraint instanceof MvelConstraint) {
          MvelConstraint mvelConstraint = (MvelConstraint) constraint;
            return NODE_NAME + "<BR/>expression : " + mvelConstraint.toString();
        }
        return NODE_NAME + "<BR/>";
    }
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     * @return field name
     */
    public String getFieldName() {
        AlphaNodeFieldConstraint constraint = this.node.getConstraint();
        if (constraint instanceof MvelConstraint) {
          MvelConstraint mvelConstraint = (MvelConstraint) constraint;
            InternalReadAccessor accessor = mvelConstraint.getFieldExtractor();
            if (accessor instanceof ClassFieldReader) {
                return ((ClassFieldReader) accessor).getFieldName();
            }
        }
        return null;
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Related Classes of org.drools.core.rule.constraint.MvelConstraint

  • org.drools.compiler.rule.builder.dialect.java.RuleBuilderTest
  • org.drools.compiler.rule.builder.MVELConstraintBuilder
  • org.drools.core.base.DroolsQuery
  • org.drools.core.common.InternalRuleBase
  • org.drools.core.definitions.InternalKnowledgePackage
  • org.drools.core.event.knowledgebase.KnowledgeBaseEventSupportTest
  • org.drools.core.event.rule.AgendaEventSupportTest
  • org.drools.core.event.RuleBaseEventSupportTest
  • org.drools.core.impl.InternalKnowledgeBase
  • org.drools.core.reteoo.AlphaNodeTest
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