Examples with CtField javassist.CtField used on opensource projects

Example 1 with CtField

use of javassist.CtField in project hibernate-orm by hibernate.

the class MapProxyTool method generate.

/**
	 * Protected for test only
	 */
protected static Class generate(String className, Map<String, Class<?>> properties) {
    try {
        ClassPool pool = ClassPool.getDefault();
        CtClass cc = pool.makeClass(className);
        cc.addInterface(resolveCtClass(Serializable.class));
        cc.addField(new CtField(resolveCtClass(Map.class), "theMap", cc));
        cc.addConstructor(generateConstructor(className, cc));
        for (Entry<String, Class<?>> entry : properties.entrySet()) {
            // add getter
            cc.addMethod(generateGetter(cc, entry.getKey(), entry.getValue()));
            // add setter
            cc.addMethod(generateSetter(cc, entry.getKey(), entry.getValue()));
        }
        return cc.toClass();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

Example 2 with CtField

use of javassist.CtField in project jersey by jersey.

the class PerfTestAgent method premain.

public static void premain(String agentArgs, Instrumentation instrumentation) {
    final String handlerClassName = (agentArgs != null && !agentArgs.isEmpty()) ? agentArgs.substring(0, agentArgs.lastIndexOf('.')) : HANDLER_CLASS_NAME;
    final String handlerMethodName = (agentArgs != null && !agentArgs.isEmpty()) ? agentArgs.substring(agentArgs.lastIndexOf('.') + 1) : HANDLER_METHOD_NAME;
    instrumentation.addTransformer(new ClassFileTransformer() {

        @Override
        public byte[] transform(ClassLoader loader, String className, Class<?> aClass, ProtectionDomain protectionDomain, byte[] bytes) throws IllegalClassFormatException {
            if (handlerClassName.replaceAll("\\.", "/").equals(className)) {
                try {
                    ClassPool cp = ClassPool.getDefault();
                    cp.appendSystemPath();
                    CtClass cc = cp.makeClass(new java.io.ByteArrayInputStream(bytes));
                    final CtField ctxField = CtField.make("public static final agent.metrics.Timer.Context agentTimerCtx;", cc);
                    final CtField registryField = CtField.make("public static final agent.metrics.MetricRegistry agentREG = new agent.metrics.MetricRegistry();", cc);
                    final CtField reporterField = CtField.make("public static final agent.metrics.JmxReporter agentReporter = agent.metrics.JmxReporter.forRegistry(agentREG).build();", cc);
                    final CtField timerField = CtField.make("public static final agent.metrics.Timer agentTimer = " + "agentREG.timer(agent.metrics.MetricRegistry.name(\"" + handlerClassName + "\", new String[] {\"" + handlerMethodName + "\"}));", cc);
                    cc.addField(registryField);
                    cc.addField(reporterField);
                    cc.addField(timerField);
                    cc.makeClassInitializer().insertAfter("agentReporter.start();");
                    CtMethod m = cc.getDeclaredMethod(handlerMethodName);
                    m.addLocalVariable("agentCtx", ctxField.getType());
                    m.insertBefore("agentCtx = agentTimer.time();");
                    m.insertAfter("agentCtx.stop();", true);
                    byte[] byteCode = cc.toBytecode();
                    cc.detach();
                    System.out.printf("Jersey Perf Agent Instrumentation Done! (instrumented method: %s)\n", m.getLongName());
                    return byteCode;
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
            return null;
        }
    });
}

Example 3 with CtField

use of javassist.CtField in project pinpoint by naver.

the class JavassistClass method addGetter.

@Override
public void addGetter(String getterTypeName, String fieldName) throws InstrumentException {
    try {
        Class<?> getterType = pluginContext.injectClass(classLoader, getterTypeName);
        GetterAnalyzer getterAnalyzer = new GetterAnalyzer();
        GetterDetails getterDetails = getterAnalyzer.analyze(getterType);
        CtField field = ctClass.getField(fieldName);
        String fieldTypeName = JavaAssistUtils.javaClassNameToObjectName(getterDetails.getFieldType().getName());
        if (!field.getType().getName().equals(fieldTypeName)) {
            throw new IllegalArgumentException("Return type of the getter is different with the field type. getterMethod: " + getterDetails.getGetter() + ", fieldType: " + field.getType().getName());
        }
        CtMethod getterMethod = CtNewMethod.getter(getterDetails.getGetter().getName(), field);
        if (getterMethod.getDeclaringClass() != ctClass) {
            getterMethod = CtNewMethod.copy(getterMethod, ctClass, null);
        }
        ctClass.addMethod(getterMethod);
        CtClass ctInterface = getCtClass(getterTypeName);
        ctClass.addInterface(ctInterface);
    } catch (Exception e) {
        throw new InstrumentException("Failed to add getter: " + getterTypeName, e);
    }
}

Example 4 with CtField

use of javassist.CtField in project pinpoint by naver.

the class JavassistClass method addSetter.

@Override
public void addSetter(String setterTypeName, String fieldName, boolean removeFinalFlag) throws InstrumentException {
    try {
        Class<?> setterType = pluginContext.injectClass(classLoader, setterTypeName);
        SetterAnalyzer setterAnalyzer = new SetterAnalyzer();
        SetterDetails setterDetails = setterAnalyzer.analyze(setterType);
        CtField field = ctClass.getField(fieldName);
        String fieldTypeName = JavaAssistUtils.javaClassNameToObjectName(setterDetails.getFieldType().getName());
        if (!field.getType().getName().equals(fieldTypeName)) {
            throw new IllegalArgumentException("Argument type of the setter is different with the field type. setterMethod: " + setterDetails.getSetter() + ", fieldType: " + field.getType().getName());
        }
        final int originalModifiers = field.getModifiers();
        if (Modifier.isStatic(originalModifiers)) {
            throw new IllegalArgumentException("Cannot add setter to static fields. setterMethod: " + setterDetails.getSetter().getName() + ", fieldName: " + fieldName);
        }
        boolean finalRemoved = false;
        if (Modifier.isFinal(originalModifiers)) {
            if (!removeFinalFlag) {
                throw new IllegalArgumentException("Cannot add setter to final field. setterMethod: " + setterDetails.getSetter().getName() + ", fieldName: " + fieldName);
            } else {
                final int modifiersWithFinalRemoved = Modifier.clear(originalModifiers, Modifier.FINAL);
                field.setModifiers(modifiersWithFinalRemoved);
                finalRemoved = true;
            }
        }
        try {
            CtMethod setterMethod = CtNewMethod.setter(setterDetails.getSetter().getName(), field);
            if (setterMethod.getDeclaringClass() != ctClass) {
                setterMethod = CtNewMethod.copy(setterMethod, ctClass, null);
            }
            ctClass.addMethod(setterMethod);
            CtClass ctInterface = getCtClass(setterTypeName);
            ctClass.addInterface(ctInterface);
        } catch (Exception e) {
            if (finalRemoved) {
                field.setModifiers(originalModifiers);
            }
            throw e;
        }
    } catch (Exception e) {
        throw new InstrumentException("Failed to add setter: " + setterTypeName, e);
    }
}

Example 5 with CtField

use of javassist.CtField in project java-chassis by ServiceComb.

the class JavassistUtils method createCtField.

private static CtField createCtField(ClassPool pool, CtClass ctClass, FieldConfig field) throws Exception {
    Class<?> fieldType = field.getType();
    CtField ctField = new CtField(pool.getCtClass(fieldType.getName()), field.getName(), ctClass);
    if (field.getGenericSignature() != null) {
        ctField.setGenericSignature(field.getGenericSignature());
    }
    ctField.setModifiers(Modifier.PUBLIC);
    return ctField;
}