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

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

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...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 } ...

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getReplicaMethodDelegationCode

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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);

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getReplicaMethodDelegationCode

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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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