Examples of ClassGenerator

Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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import static org.mvel2.asm.Opcodes.*;

public class ASMConditionEvaluatorJitter {

    public static ConditionEvaluator jitEvaluator(String expression, Condition condition, Declaration[] declarations, ClassLoader classLoader, LeftTuple leftTuple) {
        ClassGenerator generator = new ClassGenerator(getUniqueClassName(), classLoader)
                .setInterfaces(ConditionEvaluator.class)
                .addStaticField(ACC_PRIVATE | ACC_FINAL, "EXPRESSION", String.class, expression)
                .addField(ACC_PRIVATE | ACC_FINAL, "declarations", Declaration[].class)
                .addDefaultConstructor(new ClassGenerator.MethodBody() {
                    public void body(MethodVisitor mv) {
                        putFieldInThisFromRegistry("declarations", Declaration[].class, 1);
                        mv.visitInsn(RETURN);
                    }
                }, Declaration[].class);

        generator.addMethod(ACC_PUBLIC,
                            "evaluate",
                            generator.methodDescr(boolean.class, InternalFactHandle.class, InternalWorkingMemory.class, LeftTuple.class),
                            new EvaluateMethodGenerator(condition, declarations, leftTuple));

        return generator.newInstance(Declaration[].class, declarations);
    }
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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import static org.mvel2.asm.Opcodes.IASTORE;

public class ASMConditionEvaluatorJitter {

    public static ConditionEvaluator jitEvaluator(String expression, Condition condition, Declaration[] declarations, ClassLoader classLoader, LeftTuple leftTuple) {
        ClassGenerator generator = new ClassGenerator(getUniqueClassName(), classLoader)
                .setInterfaces(ConditionEvaluator.class)
                .addStaticField(ACC_PRIVATE | ACC_FINAL, "EXPRESSION", String.class, expression)
                .addField(ACC_PRIVATE | ACC_FINAL, "declarations", Declaration[].class)
                .addDefaultConstructor(new ClassGenerator.MethodBody() {
                    public void body(MethodVisitor mv) {
                        putFieldInThisFromRegistry("declarations", Declaration[].class, 1);
                        mv.visitInsn(RETURN);
                    }
                }, Declaration[].class);

        generator.addMethod(ACC_PUBLIC,
                            "evaluate",
                            generator.methodDescr(boolean.class, InternalFactHandle.class, InternalWorkingMemory.class, LeftTuple.class),
                            new EvaluateMethodGenerator(condition, declarations, leftTuple));

        return generator.newInstance(Declaration[].class, declarations);
    }
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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    public static ClassGenerator createInvokerClassGenerator(final String className,
                                                              final InvokerDataProvider data,
                                                              final ClassLoader classLoader,
                                                              final TypeResolver typeResolver) {
        final ClassGenerator generator = new ClassGenerator(className, classLoader, typeResolver)
                .addStaticField(ACC_PRIVATE + ACC_FINAL, "serialVersionUID", Long.TYPE, INVOKER_SERIAL_UID)
                .addDefaultConstructor();

        generator.addMethod(ACC_PUBLIC, "hashCode", generator.methodDescr(Integer.TYPE), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.hashCode());
                mv.visitInsn(IRETURN);
            }
        })
        .addMethod(ACC_PUBLIC, "getMethodBytecode", generator.methodDescr(List.class), new GetMethodBytecodeMethod(data))
        .addMethod(ACC_PUBLIC, "equals", generator.methodDescr(Boolean.TYPE, Object.class), new EqualsMethod());

        return generator;
    }
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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    public static ClassGenerator createInvokerClassGenerator(final String className,
                                                              final InvokerDataProvider data,
                                                              final CompositeClassLoader classLoader,
                                                              final TypeResolver typeResolver) {
        final ClassGenerator generator = new ClassGenerator(className, classLoader, typeResolver)
                .addStaticField(ACC_PRIVATE + ACC_FINAL, "serialVersionUID", Long.TYPE, INVOKER_SERIAL_UID)
                .addDefaultConstructor();

        generator.addMethod(ACC_PUBLIC, "hashCode", generator.methodDescr(Integer.TYPE), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.hashCode());
                mv.visitInsn(IRETURN);
            }
        })
        .addMethod(ACC_PUBLIC, "getMethodBytecode", generator.methodDescr(List.class), new GetMethodBytecodeMethod(data))
        .addMethod(ACC_PUBLIC, "equals", generator.methodDescr(Boolean.TYPE, Object.class), new EqualsMethod());

        return generator;
    }
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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        Set<String> imports = new HashSet<String>();
        imports.add("p1");
        imports.add("p2");

        final ClassGenerator generator = InvokerGenerator.createStubGenerator(new InvokerContext(invokerContext), getClass().getClassLoader(), null, imports);
        generator.setInterfaces(InvokerStub.class);

        InvokerStub stub = generator.newInstance();
        assertEquals("pkg", stub.getPackageName());
        assertEquals("TestRule", stub.getRuleClassName());
        assertEquals("testMethod", stub.getMethodName());
        assertEquals("TestInvokerGenerated", stub.getGeneratedInvokerClassName());
        assertEquals(111, stub.hashCode());
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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public class ClassGeneratorTest {

    @Test
    public void testGenerateBean() {
        final String MY_NAME = "myName";
        ClassGenerator generator = new ClassGenerator("pkg.Bean", getClass().getClassLoader())
                .addField(ACC_PRIVATE | ACC_FINAL, "name", String.class);

        generator.addDefaultConstructor(new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                mv.visitVarInsn(ALOAD, 0);// read local variable 0 (initialized to this) and push it on the stack
                mv.visitLdcInsn(MY_NAME); // push the String MY_NAME on the stack
                putFieldInThis("name", String.class);
                mv.visitInsn(RETURN);
            }
        }).addMethod(ACC_PUBLIC, "toString", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                getFieldFromThis("name", String.class);
                mv.visitInsn(ARETURN); // return the first object on the stack
            }
        });

        Object instance = generator.newInstance();
        assertEquals(MY_NAME, instance.toString());
    }
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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    }

    @Test
    public void testGenerateWithConstructorArg() {
        final String MY_NAME = "myName";
        ClassGenerator generator = new ClassGenerator("pkg.Bean", getClass().getClassLoader())
                .addField(ACC_PRIVATE | ACC_FINAL, "name", String.class);

        generator.addDefaultConstructor(new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                putFieldInThisFromRegistry("name", String.class, 1);
                mv.visitInsn(RETURN);
            }
        }, String.class);

        generator.addMethod(ACC_PUBLIC, "toString", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                getFieldFromThis("name", String.class);
                mv.visitInsn(ARETURN); // return the first object on the stack
            }
        });

        Object instance = generator.newInstance(String.class, MY_NAME);
        assertEquals(MY_NAME, instance.toString());
    }
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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        Set<String> imports = new HashSet<String>();
        imports.add("p1");
        imports.add("p2");

        final ClassGenerator generator = InvokerGenerator.createStubGenerator(new InvokerContext(invokerContext), getClass().getClassLoader(), null, imports);
        generator.setInterfaces(InvokerStub.class);

        InvokerStub stub = generator.newInstance();
        assertEquals("pkg", stub.getPackageName());
        assertEquals("TestRule", stub.getRuleClassName());
        assertEquals("testMethod", stub.getMethodName());
        assertEquals("TestInvokerGenerated", stub.getGeneratedInvokerClassName());
        assertEquals(111, stub.hashCode());
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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public class ASMPredicateStubBuilder extends AbstractASMPredicateBuilder {

    protected byte[] createPredicateBytecode(final RuleBuildContext ruleContext, final Map vars) {
        final InvokerDataProvider data = new InvokerContext(vars);
        final ClassGenerator generator = InvokerGenerator.createInvokerStubGenerator(data, ruleContext);
        createStubPredicate(generator, data, vars);
        return generator.generateBytecode();
    }
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Examples of org.drools.core.rule.builder.dialect.asm.ClassGenerator

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    public static ClassGenerator createStubGenerator(final InvokerDataProvider data,
                                                     final ClassLoader classLoader,
                                                     final TypeResolver typeResolver,
                                                     final Set<String> imports) {
        final ClassGenerator generator = new ClassGenerator(data.getPackageName() + "." + data.getInvokerClassName(),
                                                            classLoader,
                                                            typeResolver);

        generator.addStaticField(ACC_PRIVATE + ACC_FINAL, "serialVersionUID", Long.TYPE, GeneratorHelper.INVOKER_SERIAL_UID)
                .addDefaultConstructor();

        generator.addMethod(ACC_PUBLIC, "hashCode", generator.methodDescr(Integer.TYPE), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.hashCode());
                mv.visitInsn(IRETURN);
            }
        }).addMethod(ACC_PUBLIC, "getMethodBytecode", generator.methodDescr(List.class), new GeneratorHelper.GetMethodBytecodeMethod(data)
        ).addMethod(ACC_PUBLIC, "equals", generator.methodDescr(Boolean.TYPE, Object.class), new GeneratorHelper.EqualsMethod()
        ).addMethod(ACC_PUBLIC, "getPackageName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.getPackageName());
                mv.visitInsn(ARETURN);
            }
        }).addMethod(ACC_PUBLIC, "getGeneratedInvokerClassName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.getInvokerClassName() + "Generated");
                mv.visitInsn(ARETURN);
            }
        }).addMethod(ACC_PUBLIC, "getExpectedDeclarationTypes", generator.methodDescr(String[].class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                Declaration[] declarations = ( (InvokerContext) data ).getDeclarations();
                List<String> declarationTypes = new ArrayList<String>( declarations.length );
                for ( Declaration decl : declarations ) {
                    declarationTypes.add( decl.getTypeName() );
                }
                returnAsArray( declarationTypes, String.class );
            }
        }).addMethod(ACC_PUBLIC, "getRuleClassName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.getRuleClassName());
                mv.visitInsn(ARETURN);
            }
        }).addMethod(ACC_PUBLIC, "getInternalRuleClassName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.getInternalRuleClassName());
                mv.visitInsn(ARETURN);
            }
        }).addMethod(ACC_PUBLIC, "getMethodName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.getMethodName());
                mv.visitInsn(ARETURN);
            }
        }).addMethod(ACC_PUBLIC, "getInvokerClassName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                push(data.getInvokerClassName());
                mv.visitInsn(ARETURN);
            }
        }).addMethod(ACC_PUBLIC, "getGlobals", generator.methodDescr(String[].class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                returnAsArray(data.getGlobals());
            }
        }).addMethod(ACC_PUBLIC, "getGlobalTypes", generator.methodDescr(String[].class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                returnAsArray(data.getGlobalTypes());
            }
        }).addMethod(ACC_PUBLIC, "getPackageImports", generator.methodDescr(String[].class), new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                returnAsArray(imports, String.class);
            }
        });
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