Examples with Declaration org.drools.core.rule.Declaration used on opensource projects

Example 26 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class ASMConsequenceBuilder method createConsequenceBytecode.

protected byte[] createConsequenceBytecode(RuleBuildContext ruleContext, final Map<String, Object> consequenceContext) {
    final InvokerDataProvider data = new InvokerContext(consequenceContext);
    final String name = (String) consequenceContext.get("consequenceName");
    final Declaration[] declarations = (Declaration[]) consequenceContext.get("declarations");
    final ClassGenerator generator = InvokerGenerator.createInvokerClassGenerator(data, ruleContext).setInterfaces(Consequence.class, CompiledInvoker.class);
    generator.addMethod(ACC_PUBLIC, "getName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            push(name);
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(null, KnowledgeHelper.class, WorkingMemory.class), new String[] { "java/lang/Exception" }, new GeneratorHelper.EvaluateMethod() {

        public void body(MethodVisitor mv) {
            // Tuple tuple = knowledgeHelper.getTuple();
            mv.visitVarInsn(ALOAD, 1);
            invokeInterface(KnowledgeHelper.class, "getTuple", Tuple.class);
            mv.visitVarInsn(ASTORE, 3);
            // Declaration[] declarations = ((RuleTerminalNode)knowledgeHelper.getMatch().getTuple().getTupleSink()).getDeclarations();
            mv.visitVarInsn(ALOAD, 1);
            invokeInterface(KnowledgeHelper.class, "getMatch", Activation.class);
            invokeInterface(Activation.class, "getTuple", Tuple.class);
            invokeInterface(Tuple.class, "getTupleSink", Sink.class);
            cast(RuleTerminalNode.class);
            invokeVirtual(RuleTerminalNode.class, "getRequiredDeclarations", Declaration[].class);
            mv.visitVarInsn(ASTORE, 4);
            final String[] globals = data.getGlobals();
            final String[] globalTypes = data.getGlobalTypes();
            final Boolean[] notPatterns = (Boolean[]) consequenceContext.get("notPatterns");
            int[] paramsPos = new int[declarations.length];
            int offset = 5;
            for (int i = 0; i < declarations.length; i++) {
                int factPos = offset;
                int objPos = ++offset;
                paramsPos[i] = factPos;
                // Object obj[i] = tuple.get(declarations[i]);
                // org.kie.spi.Tuple
                mv.visitVarInsn(ALOAD, 3);
                // org.kie.rule.Declaration[]
                mv.visitVarInsn(ALOAD, 4);
                // i
                push(i);
                // declarations[i]
                mv.visitInsn(AALOAD);
                invokeInterface(Tuple.class, "get", InternalFactHandle.class, Declaration.class);
                // fact[i]
                mv.visitVarInsn(ASTORE, factPos);
                // declarations[i].getValue((org.kie.common.InternalWorkingMemory)workingMemory, obj[i] );
                // org.kie.rule.Declaration[]
                mv.visitVarInsn(ALOAD, 4);
                // i
                push(i);
                // declarations[i]
                mv.visitInsn(AALOAD);
                // WorkingMemory
                mv.visitVarInsn(ALOAD, 2);
                cast(InternalWorkingMemory.class);
                // fact[i]
                mv.visitVarInsn(ALOAD, factPos);
                invokeInterface(InternalFactHandle.class, "getObject", Object.class);
                String readMethod = declarations[i].getNativeReadMethodName();
                boolean isObject = readMethod.equals("getValue");
                String returnedType = isObject ? "Ljava/lang/Object;" : typeDescr(declarations[i].getTypeName());
                mv.visitMethodInsn(INVOKEVIRTUAL, Declaration.class.getName().replace('.', '/'), readMethod, "(L" + InternalWorkingMemory.class.getName().replace('.', '/') + ";Ljava/lang/Object;)" + returnedType);
                if (isObject)
                    mv.visitTypeInsn(CHECKCAST, internalName(declarations[i].getTypeName()));
                // obj[i]
                offset += store(objPos, declarations[i].getTypeName());
                if (notPatterns[i]) {
                    mv.visitVarInsn(ALOAD, 1);
                    invokeInterface(KnowledgeHelper.class, "getWorkingMemory", WorkingMemory.class);
                    loadAsObject(objPos);
                    invokeInterface(WorkingMemory.class, "getFactHandle", FactHandle.class, Object.class);
                    cast(InternalFactHandle.class);
                    mv.visitVarInsn(ASTORE, factPos);
                }
            }
            // @{ruleClassName}.@{methodName}(KnowledgeHelper, @foreach{declr : declarations} Object, FactHandle @end)
            StringBuilder consequenceMethodDescr = new StringBuilder("(L" + KnowledgeHelper.class.getName().replace('.', '/') + ";");
            // KnowledgeHelper
            mv.visitVarInsn(ALOAD, 1);
            for (int i = 0; i < declarations.length; i++) {
                // obj[i]
                load(paramsPos[i] + 1);
                // fact[i]
                mv.visitVarInsn(ALOAD, paramsPos[i]);
                consequenceMethodDescr.append(typeDescr(declarations[i].getTypeName())).append("L" + FactHandle.class.getName().replace('.', '/') + ";");
            }
            // @foreach{type : globalTypes, identifier : globals} @{type} @{identifier} = ( @{type} ) workingMemory.getGlobal( "@{identifier}" );
            for (int i = 0; i < globals.length; i++) {
                // WorkingMemory
                mv.visitVarInsn(ALOAD, 2);
                push(globals[i]);
                invokeInterface(WorkingMemory.class, "getGlobal", Object.class, String.class);
                mv.visitTypeInsn(CHECKCAST, internalName(globalTypes[i]));
                consequenceMethodDescr.append(typeDescr(globalTypes[i]));
            }
            consequenceMethodDescr.append(")V");
            mv.visitMethodInsn(INVOKESTATIC, data.getInternalRuleClassName(), data.getMethodName(), consequenceMethodDescr.toString());
            mv.visitInsn(RETURN);
        }
    });
    return generator.generateBytecode();
}

Example 27 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class ASMReturnValueStubBuilder method createStubReturnValue.

private void createStubReturnValue(final ClassGenerator generator, final InvokerDataProvider data, final Map vars) {
    generator.setInterfaces(ReturnValueStub.class, CompiledInvoker.class).addField(ACC_PRIVATE + ACC_VOLATILE, "returnValue", ReturnValueExpression.class);
    generator.addMethod(ACC_PUBLIC, "createContext", generator.methodDescr(Object.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            mv.visitInsn(ACONST_NULL);
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "replaceDeclaration", generator.methodDescr(null, Declaration.class, Declaration.class)).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(FieldValue.class, Object.class, Tuple.class, Declaration[].class, Declaration[].class, WorkingMemory.class, Object.class), new String[] { "java/lang/Exception" }, new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            Label syncStart = new Label();
            Label syncEnd = new Label();
            Label l1 = new Label();
            Label l2 = new Label();
            mv.visitTryCatchBlock(syncStart, l1, l2, null);
            Label l3 = new Label();
            mv.visitTryCatchBlock(l2, l3, l2, null);
            getFieldFromThis("returnValue", ReturnValueExpression.class);
            mv.visitJumpInsn(IFNONNULL, syncEnd);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitInsn(DUP);
            mv.visitVarInsn(ASTORE, 7);
            // synchronized(this) {
            mv.visitInsn(MONITORENTER);
            mv.visitLabel(syncStart);
            getFieldFromThis("returnValue", ReturnValueExpression.class);
            // if (returnValue == null) ...
            Label ifNotInitialized = new Label();
            mv.visitJumpInsn(IFNONNULL, ifNotInitialized);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 2);
            mv.visitVarInsn(ALOAD, 3);
            mv.visitVarInsn(ALOAD, 4);
            mv.visitVarInsn(ALOAD, 5);
            invokeStatic(ReturnValueGenerator.class, "generate", null, ReturnValueStub.class, Tuple.class, Declaration[].class, Declaration[].class, WorkingMemory.class);
            mv.visitLabel(ifNotInitialized);
            mv.visitVarInsn(ALOAD, 7);
            mv.visitInsn(MONITOREXIT);
            mv.visitLabel(l1);
            mv.visitJumpInsn(GOTO, syncEnd);
            mv.visitLabel(l2);
            mv.visitVarInsn(ASTORE, 8);
            mv.visitVarInsn(ALOAD, 7);
            mv.visitInsn(MONITOREXIT);
            mv.visitLabel(l3);
            mv.visitVarInsn(ALOAD, 8);
            mv.visitInsn(ATHROW);
            mv.visitLabel(syncEnd);
            // } end of synchronized
            getFieldFromThis("returnValue", ReturnValueExpression.class);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitVarInsn(ALOAD, 2);
            mv.visitVarInsn(ALOAD, 3);
            mv.visitVarInsn(ALOAD, 4);
            mv.visitVarInsn(ALOAD, 5);
            mv.visitVarInsn(ALOAD, 6);
            invokeInterface(ReturnValueExpression.class, "evaluate", FieldValue.class, Object.class, Tuple.class, Declaration[].class, Declaration[].class, WorkingMemory.class, Object.class);
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "setReturnValue", generator.methodDescr(null, ReturnValueExpression.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            putFieldInThisFromRegistry("returnValue", ReturnValueExpression.class, 1);
            mv.visitInsn(RETURN);
        }
    });
}

Example 28 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class TemporalEvaluatorFactoryTest method getContextEntry.

private VariableContextEntry getContextEntry(final Evaluator evaluator, final InternalReadAccessor extractor, final ValueType valueType, final Object[] row, final boolean left) {
    final Declaration declaration = new Declaration("test", extractor, null);
    final ValueType coerced = evaluator.getCoercedValueType();
    if (evaluator.isTemporal()) {
        if (evaluator instanceof BeforeEvaluatorDefinition.BeforeEvaluator || evaluator instanceof MeetsEvaluatorDefinition.MeetsEvaluator) {
            LeftStartRightEndContextEntry context = new LeftStartRightEndContextEntry(extractor, declaration, evaluator);
            if (left) {
                context.timestamp = ((EventFactHandle) row[2]).getStartTimestamp();
            } else {
                context.timestamp = ((EventFactHandle) row[0]).getEndTimestamp();
            }
            return context;
        }
        if (evaluator instanceof AfterEvaluatorDefinition.AfterEvaluator || evaluator instanceof MetByEvaluatorDefinition.MetByEvaluator) {
            LeftEndRightStartContextEntry context = new LeftEndRightStartContextEntry(extractor, declaration, evaluator);
            if (left) {
                context.timestamp = ((EventFactHandle) row[2]).getEndTimestamp();
            } else {
                context.timestamp = ((EventFactHandle) row[0]).getStartTimestamp();
            }
            return context;
        }
        // else
        TemporalVariableContextEntry context = new TemporalVariableContextEntry(extractor, declaration, evaluator);
        if (left) {
            context.startTS = ((EventFactHandle) row[2]).getStartTimestamp();
            context.endTS = ((EventFactHandle) row[2]).getEndTimestamp();
        } else {
            context.startTS = ((EventFactHandle) row[0]).getStartTimestamp();
            context.endTS = ((EventFactHandle) row[0]).getEndTimestamp();
        }
        return context;
    }
    if (coerced.isIntegerNumber()) {
        final LongVariableContextEntry context = new LongVariableContextEntry(extractor, declaration, evaluator);
        if (row[2] == null) {
            context.leftNull = true;
        } else {
            context.left = ((Number) row[2]).longValue();
        }
        if (row[0] == null) {
            context.rightNull = true;
        } else {
            context.right = ((Number) row[0]).longValue();
        }
        return context;
    } else if (coerced.isChar()) {
        final CharVariableContextEntry context = new CharVariableContextEntry(extractor, declaration, evaluator);
        if (row[2] == null) {
            context.leftNull = true;
        } else {
            context.left = ((Character) row[2]).charValue();
        }
        if (row[0] == null) {
            context.rightNull = true;
        } else {
            context.right = ((Character) row[0]).charValue();
        }
        return context;
    } else if (coerced.isBoolean()) {
        final BooleanVariableContextEntry context = new BooleanVariableContextEntry(extractor, declaration, evaluator);
        if (row[2] == null) {
            context.leftNull = true;
        } else {
            context.left = ((Boolean) row[2]).booleanValue();
        }
        if (row[0] == null) {
            context.rightNull = true;
        } else {
            context.right = ((Boolean) row[0]).booleanValue();
        }
        return context;
    } else if (coerced.isFloatNumber()) {
        final DoubleVariableContextEntry context = new DoubleVariableContextEntry(extractor, declaration, evaluator);
        if (row[2] == null) {
            context.leftNull = true;
        } else {
            context.left = ((Number) row[2]).doubleValue();
        }
        if (row[0] == null) {
            context.rightNull = true;
        } else {
            context.right = ((Number) row[0]).doubleValue();
        }
        return context;
    } else {
        final ObjectVariableContextEntry context = new ObjectVariableContextEntry(extractor, declaration, evaluator);
        if (row[2] == null) {
            context.leftNull = true;
        } else {
            context.left = row[2];
        }
        if (row[0] == null) {
            context.rightNull = true;
        } else {
            context.right = row[0];
        }
        return context;
    }
}

Example 29 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class BaseMannersTest method getContinueProcessing.

/**
 * <pre>
 * rule continue() {
 *     Context context;
 *     when {
 *         context : Context( state == Context.CHECK_DONE )
 *     } then {
 *         context.setState( Context.ASSIGN_SEATS );
 *     }
 * }
 * </pre>
 * @return
 * @throws InvalidRuleException
 */
private RuleImpl getContinueProcessing() throws InvalidRuleException {
    final RuleImpl rule = new RuleImpl("continueProcessng");
    // -----------
    // context : Context( state == Context.CHECK_DONE )
    // -----------
    final Pattern contextPattern = new Pattern(0, this.contextType, "context");
    contextPattern.addConstraint(getLiteralConstraint(contextPattern, "state", Context.CHECK_DONE));
    rule.addPattern(contextPattern);
    final Declaration contextDeclaration = rule.getDeclaration("context");
    // ------------
    // context.setName( Context.ASSIGN_SEATS );
    // ------------
    final Consequence consequence = new Consequence() {

        public void evaluate(KnowledgeHelper drools, WorkingMemory workingMemory) throws ConsequenceException {
            try {
                RuleImpl rule = drools.getRule();
                LeftTuple tuple = (LeftTuple) 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();
                throw new ConsequenceException(e);
            }
        }

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

        public void writeExternal(ObjectOutput out) throws IOException {
        }

        public String getName() {
            return "default";
        }
    };
    rule.setConsequence(consequence);
    return rule;
}

Example 30 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class BaseMannersTest method getAllDone.

/**
 * <pre>
 * rule all_done() {
 *     Context context;
 *     when {
 *         context : Context( state == Context.PRINT_RESULTS )
 *     } then {
 *     }
 * }
 * </pre>
 *
 * @return
 * @throws InvalidRuleException
 */
private RuleImpl getAllDone() throws InvalidRuleException {
    final RuleImpl rule = new RuleImpl("alldone");
    // -----------
    // context : Context( state == Context.PRINT_RESULTS )
    // -----------
    final Pattern contextPattern = new Pattern(0, this.contextType);
    contextPattern.addConstraint(getLiteralConstraint(contextPattern, "state", Context.PRINT_RESULTS));
    rule.addPattern(contextPattern);
    final Declaration contextDeclaration = rule.getDeclaration("context");
    // ------------
    // 
    // ------------
    final Consequence consequence = new Consequence() {

        public void evaluate(KnowledgeHelper drools, WorkingMemory workingMemory) throws ConsequenceException {
            try {
                System.err.println("all done");
            } catch (Exception e) {
                throw new ConsequenceException(e);
            }
        }

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

        public void writeExternal(ObjectOutput out) throws IOException {
        }

        public String getName() {
            return "default";
        }
    };
    rule.setConsequence(consequence);
    return rule;
}