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How to use getReplicaMethodDelegationCode method of org.powermock.core.ClassReplicaCreator class

Best Powermock code snippet using org.powermock.core.ClassReplicaCreator.getReplicaMethodDelegationCode

Source:ClassReplicaCreator.java

...53        try {54            originalClassAsCtClass = classpool.get(originalClassName);55            CtMethod[] declaredMethods = originalClassAsCtClass.getDeclaredMethods();56            for (CtMethod ctMethod : declaredMethods) {57                final String code = getReplicaMethodDelegationCode(clazz, ctMethod, null);58                CtNewMethod.make(ctMethod.getReturnType(), ctMethod.getName(), ctMethod.getParameterTypes(), ctMethod.getExceptionTypes(),59                        code, newClass);60            }6162            return newClass.toClass(this.getClass().getClassLoader(), this.getClass().getProtectionDomain());63        } catch (Exception e) {64            throw new RuntimeException(e);65        }66    }6768    /**69     * Create a class that is a replica of type <code>T</code>. To allow for70     * partial mocking all calls to non-mocked methods will be delegated to the71     * <code>delegator</code>.72     * 73     * @param <T>74     *            The type of the replica class to be created.75     * @param delegator76     *            The delegator object that will be invoked to allow for partial77     *            mocking.78     * @return A replica class that can be used to duck-type an instance.79     */80    @SuppressWarnings("unchecked")81    public <T> Class<T> createInstanceReplica(T delegator) {82        if (delegator == null) {83            throw new IllegalArgumentException("delegator cannot be null");84        }85        final Class<T> clazz = (Class<T>) delegator.getClass();86        ClassPool classpool = ClassPool.getDefault();87        final String originalClassName = clazz.getName();88        CtClass originalClassAsCtClass = null;89        final CtClass newClass = classpool.makeClass(generateReplicaClassName(clazz));90        try {91            originalClassAsCtClass = classpool.get(originalClassName);9293            copyFields(originalClassAsCtClass, newClass);94            addDelegatorField(delegator, newClass);9596            CtMethod[] declaredMethods = originalClassAsCtClass.getDeclaredMethods();97            for (CtMethod ctMethod : declaredMethods) {98            	getReplicaMethodDelegationCode(delegator.getClass(), ctMethod, POWERMOCK_INSTANCE_DELEGATOR_FIELD_NAME);99                //final String code = getReplicaMethodDelegationCode(delegator.getClass(), ctMethod, POWERMOCK_INSTANCE_DELEGATOR_FIELD_NAME);100                // CtMethod make = CtNewMethod.make(ctMethod.getReturnType(),101                // ctMethod.getName(), ctMethod.getParameterTypes(), ctMethod102                // .getExceptionTypes(), code, newClass);103                CtMethod make2 = CtNewMethod.copy(ctMethod, newClass, null);104                // make2.setBody(code);105                newClass.addMethod(make2);106            }107108            CtConstructor[] declaredConstructors = originalClassAsCtClass.getDeclaredConstructors();109            for (CtConstructor ctConstructor : declaredConstructors) {110                CtConstructor copy = CtNewConstructor.copy(ctConstructor, newClass, null);111                newClass.addConstructor(copy);112            }113            return newClass.toClass(this.getClass().getClassLoader(), this.getClass().getProtectionDomain());114        } catch (Exception e) {115            throw new RuntimeException(e);116        }117    }118119    /**120     * Add a field to the replica class that holds the instance delegator. I.e.121     * if we're creating a instance replica of <code>java.lang.Long</code> this122     * methods adds a new field of type <code>delegator.getClass()</code> to the123     * replica class.124     */125    private <T> void addDelegatorField(T delegator, final CtClass replicaClass) throws CannotCompileException {126        CtField f = CtField.make(String.format("private %s %s = null;", delegator.getClass().getName(),127                POWERMOCK_INSTANCE_DELEGATOR_FIELD_NAME), replicaClass);128        replicaClass.addField(f);129    }130131    private <T> String generateReplicaClassName(final Class<T> clazz) {132        return "replica." + clazz.getName() + "$$PowerMock" + counter.getAndIncrement();133    }134135    private void copyFields(CtClass originalClassAsCtClass, final CtClass newClass) throws CannotCompileException, NotFoundException {136        CtField[] declaredFields = originalClassAsCtClass.getDeclaredFields();137        CtField[] undeclaredFields = originalClassAsCtClass.getFields();138        Set<CtField> allFields = new HashSet<CtField>();139        for (CtField ctField : declaredFields) {140            allFields.add(ctField);141        }142        for (CtField ctField : undeclaredFields) {143            allFields.add(ctField);144        }145146        for (CtField ctField : allFields) {147            CtField f = new CtField(ctField.getType(), ctField.getName(), newClass);148            newClass.addField(f);149        }150    }151152    /*153     * Invokes a instance method of the original instance. This enables partial154     * mocking of system classes.155     */156    private String getReplicaMethodDelegationCode(Class<?> clazz, CtMethod ctMethod, String classOrInstanceToDelegateTo)157            throws NotFoundException {158        StringBuilder builder = new StringBuilder();159        builder.append("{System.out.println(\"ikk\");\n");160        builder.append("java.lang.reflect.Method originalMethod = ");161        builder.append(clazz.getName());162        builder.append(".class.getDeclaredMethod(\"");163        builder.append(ctMethod.getName());164        builder.append("\", ");165        final String parametersAsString = getParametersAsString(getParameterTypes(ctMethod));166        if ("".equals(parametersAsString)) {167            builder.append("null");168        } else {169            builder.append(parametersAsString);170        }
...

getReplicaMethodDelegationCode

Using AI Code Generation

1String code = ClassReplicaCreator.getReplicaMethodDelegationCode("getReplicaMethodDelegationCode", "org.powermock.core.ClassReplicaCreator");2System.out.println(code);3String code = ClassReplicaCreator.getReplicaMethodDelegationCode("getReplicaMethodDelegationCode", "org.powermock.core.ClassReplicaCreator");4System.out.println(code);5String code = ClassReplicaCreator.getReplicaMethodDelegationCode("getReplicaMethodDelegationCode", "org.powermock.core.ClassReplicaCreator");6System.out.println(code);7String code = ClassReplicaCreator.getReplicaMethodDelegationCode("getReplicaMethodDelegationCode", "org.powermock.core.ClassReplicaCreator");8System.out.println(code);9String code = ClassReplicaCreator.getReplicaMethodDelegationCode("getReplicaMethodDelegationCode", "org.powermock.core.ClassReplicaCreator");10System.out.println(code);11String code = ClassReplicaCreator.getReplicaMethodDelegationCode("getReplicaMethodDelegationCode", "org.powermock.core.ClassReplicaCreator");12System.out.println(code);13String code = ClassReplicaCreator.getReplicaMethodDelegationCode("getReplicaMethodDelegationCode", "org.powermock.core.ClassReplicaCreator");14System.out.println(code);

getReplicaMethodDelegationCode

Using AI Code Generation

1    public static String getReplicaMethodDelegationCode(Class<?> clazz, String methodName, Class<?>[] parameterTypes, String[] parameterNames) {2        StringBuilder sb = new StringBuilder();3        sb.append("public static Object $").append(methodName).append("($$) {");4        sb.append("return org.powermock.core.ClassReplicaCreator.getReplicaMethodDelegationCode(").append(clazz.getName()).append(".class");5        sb.append(", \"").append(methodName).append("\"");6        sb.append(", new Class[] {");7        for (int i = 0; i < parameterTypes.length; i++) {8            if (i > 0) {9                sb.append(", ");10            }11            sb.append(parameterTypes[i].getName()).append(".class");12        }13        sb.append("}");14        sb.append(", new String[] {");15        for (int i = 0; i < parameterNames.length; i++) {16            if (i > 0) {17                sb.append(", ");18            }19            sb.append("\"").append(parameterNames[i]).append("\"");20        }21        sb.append("}");22        sb.append(");");23        sb.append("}");24        return sb.toString();25    }26}27package org.powermock.core;28import org.junit.Test;29import org.powermock.core.test.MockClassLoader;30import java.lang.reflect.Method;31import static org.junit.Assert.assertEquals;32public class ClassReplicaCreatorTest {33    public void should_create_delegation_code() throws Exception {34        Class<?> clazz = new MockClassLoader().loadClass(ReplicaClass.class.getName());35        Method method = clazz.getMethod("method", String.class, int.class);36        String[] parameterNames = new String[method.getParameterTypes().length];37        String delegationCode = ClassReplicaCreator.getReplicaMethodDelegationCode(clazz, method.getName(), method.getParameterTypes(), parameterNames);38        assertEquals("public static Object $method($$) {return org.powermock.core.ClassReplicaCreator.getReplicaMethodDelegationCode(org.powermock.core.ReplicaClass.class, \"method\", new Class[] {java.lang.String.class, int.class}, new String[] {\"arg0\", \"arg1\"});}", delegationCode);39    }40    public static class ReplicaClass {41        public Object method(String arg0, int arg1) {42            return null;43        }44    }45}

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