VIVO-120 improve the error messages from OperationUtils.cloneBean()
Add unit tests for the method and restructure the logic so a failure to create the clone is treated as seriously as a failure to load it with values. Previously a failure to create resulted in a null return (with a log message) while a failure to load resulted in an exception (with a log message).
This commit is contained in:
j2blake
parent
9ec06f224e
commit
a19227188b
2 changed files with 574 additions and 137 deletions
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@ -10,138 +10,144 @@ import org.apache.commons.logging.LogFactory;
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import edu.cornell.mannlib.vedit.beans.EditProcessObject;
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import edu.cornell.mannlib.vedit.beans.EditProcessObject;
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public class OperationUtils {
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public class OperationUtils{
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private static final Log log = LogFactory.getLog(OperationUtils.class
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.getName());
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private static final Log log = LogFactory.getLog(OperationUtils.class.getName());
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public static void beanSetAndValidate(Object newObj, String field,
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String value, EditProcessObject epo) {
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Class<?> cls = (epo.getBeanClass() != null) ? epo.getBeanClass() : newObj
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.getClass();
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Class<?>[] paramList = new Class[1];
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paramList[0] = String.class;
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boolean isInt = false;
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boolean isBoolean = false;
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Method setterMethod = null;
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try {
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setterMethod = cls.getMethod("set" + field, paramList);
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} catch (NoSuchMethodException e) {
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// let's try int
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paramList[0] = int.class;
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try {
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setterMethod = cls.getMethod("set" + field, paramList);
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isInt = true;
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} catch (NoSuchMethodException f) {
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// let's try boolean
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paramList[0] = boolean.class;
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try {
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setterMethod = cls.getMethod("set" + field, paramList);
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isBoolean = true;
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log.debug("found boolean field " + field);
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} catch (NoSuchMethodException g) {
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log.error("beanSet could not find an appropriate String, int, or boolean setter method for "
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+ field);
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}
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public static void beanSetAndValidate(Object newObj, String field, String value, EditProcessObject epo){
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}
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Class cls = (epo.getBeanClass() != null) ? epo.getBeanClass() : newObj.getClass();
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}
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Class[] paramList = new Class[1];
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Object[] arglist = new Object[1];
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paramList[0] = String.class;
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if (isInt)
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boolean isInt = false;
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arglist[0] = Integer.decode(value);
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boolean isBoolean = false;
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else if (isBoolean)
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Method setterMethod = null;
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arglist[0] = (value.equalsIgnoreCase("TRUE"));
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try {
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else
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setterMethod = cls.getMethod("set"+field,paramList);
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arglist[0] = value;
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} catch (NoSuchMethodException e) {
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try {
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//let's try int
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setterMethod.invoke(newObj, arglist);
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paramList[0] = int.class;
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} catch (Exception e) {
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try {
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log.error("Couldn't invoke method");
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setterMethod = cls.getMethod("set"+field,paramList);
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log.error(e.getMessage());
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isInt = true;
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log.error(field + " " + arglist[0]);
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} catch (NoSuchMethodException f) {
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}
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//let's try boolean
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}
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paramList[0]=boolean.class;
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try {
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setterMethod = cls.getMethod("set"+field,paramList);
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isBoolean = true;
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log.debug("found boolean field "+field);
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} catch (NoSuchMethodException g) {
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log.error("beanSet could not find an appropriate String, int, or boolean setter method for "+field);
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}
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}
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/**
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}
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* Takes a bean and clones it using reflection. Any fields without standard
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Object[] arglist = new Object[1];
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* getter/setter methods will not be copied.
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if (isInt)
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*/
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arglist[0] = Integer.decode(value);
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public static Object cloneBean(Object bean) {
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else if (isBoolean)
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if (bean == null) {
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arglist[0] = (value.equalsIgnoreCase("TRUE"));
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throw new NullPointerException("bean may not be null.");
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else
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}
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arglist[0] = value;
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return cloneBean(bean, bean.getClass(), bean.getClass());
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try {
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}
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setterMethod.invoke(newObj,arglist);
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} catch (Exception e) {
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log.error("Couldn't invoke method");
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log.error(e.getMessage());
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log.error(field+" "+arglist[0]);
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}
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}
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/**
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/**
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* Takes a bean and clones it using reflection.
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* Takes a bean and clones it using reflection. Any fields without standard
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* Any fields without standard getter/setter methods will not be copied.
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* getter/setter methods will not be copied.
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* @param bean
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*/
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* @return
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public static Object cloneBean(final Object bean, final Class<?> beanClass,
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*/
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final Class<?> iface) {
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public static Object cloneBean (Object bean) {
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if (bean == null) {
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return cloneBean(bean, bean.getClass(), bean.getClass());
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throw new NullPointerException("bean may not be null.");
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}
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}
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if (beanClass == null) {
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throw new NullPointerException("beanClass may not be null.");
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}
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if (iface == null) {
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throw new NullPointerException("iface may not be null.");
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}
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/**
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class CloneBeanException extends RuntimeException {
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* Takes a bean and clones it using reflection.
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public CloneBeanException(String message, Throwable cause) {
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* Any fields without standard getter/setter methods will not be copied.
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super(message + " <" + cause.getClass().getSimpleName()
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* @param bean
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+ ">: bean=" + bean + ", beanClass="
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* @return
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+ beanClass.getName() + ", iface=" + iface.getName(),
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*/
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cause);
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public static Object cloneBean (Object bean, Class beanClass, Class iface){
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}
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Object newBean = null;
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}
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try {
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newBean = beanClass.newInstance();
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Object newBean;
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Method[] beanMeths = iface.getMethods();
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try {
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for (int i=0; i<beanMeths.length ; ++i) {
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newBean = beanClass.getConstructor().newInstance();
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Method beanMeth = beanMeths[i];
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} catch (NoSuchMethodException e) {
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String methName = beanMeth.getName();
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throw new CloneBeanException("bean has no 'nullary' constructor.", e);
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if (methName.startsWith("get")
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} catch (InstantiationException e) {
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&& beanMeth.getParameterTypes().length == 0 ) {
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throw new CloneBeanException("tried to create instance of an abstract class.", e);
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String fieldName = methName.substring(3,methName.length());
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} catch (IllegalAccessException e) {
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Class returnType = beanMeth.getReturnType();
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throw new CloneBeanException("bean constructor is not accessible.", e);
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try {
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} catch (InvocationTargetException e) {
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Class[] args = new Class[1];
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throw new CloneBeanException("bean constructor threw an exception.", e);
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args[0] = returnType;
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} catch (Exception e) {
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Method setterMethod = iface.getMethod("set"+fieldName,args);
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throw new CloneBeanException("failed to instantiate a new bean.", e);
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try {
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}
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Object fieldVal = beanMeth.invoke(bean,(Object[])null);
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try {
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for (Method beanMeth : iface.getMethods()) {
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Object[] setArgs = new Object[1];
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String methName = beanMeth.getName();
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setArgs[0] = fieldVal;
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if (!methName.startsWith("get")) {
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setterMethod.invoke(newBean,setArgs);
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continue;
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} catch (IllegalAccessException iae) {
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}
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log.error(OperationUtils.class.getName() +
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if (beanMeth.getParameterTypes().length != 0) {
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".cloneBean() " +
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continue;
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" encountered IllegalAccessException " +
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}
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" invoking " +
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String fieldName = methName.substring(3, methName.length());
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setterMethod.getName(), iae);
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Class<?> returnType = beanMeth.getReturnType();
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throw new RuntimeException(iae);
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} catch (InvocationTargetException ite) {
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Method setterMethod;
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log.error(OperationUtils.class.getName() +
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try {
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".cloneBean() " +
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setterMethod = iface.getMethod("set" + fieldName, returnType);
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" encountered InvocationTargetException"
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} catch (NoSuchMethodException nsme) {
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+ " invoking "
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continue;
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+ setterMethod.getName(), ite);
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}
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throw new RuntimeException(ite);
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}
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Object fieldVal;
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} catch (IllegalAccessException iae) {
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try {
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log.error(OperationUtils.class.getName() +
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fieldVal = beanMeth.invoke(bean, (Object[]) null);
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".cloneBean() encountered " +
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} catch (Exception e) {
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" IllegalAccessException invoking " +
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throw new CloneBeanException("failed to invoke " + beanMeth, e);
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beanMeths[i].getName(), iae);
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}
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throw new RuntimeException(iae);
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} catch (InvocationTargetException ite) {
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try {
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log.error(OperationUtils.class.getName() +
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Object[] setArgs = new Object[1];
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".cloneBean() encountered " +
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setArgs[0] = fieldVal;
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" InvocationTargetException invoking " +
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setterMethod.invoke(newBean, setArgs);
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beanMeths[i].getName(), ite);
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} catch (Exception e) {
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throw new RuntimeException(ite);
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throw new CloneBeanException(
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} catch (IllegalArgumentException iae) {
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"failed to invoke " + setterMethod, e);
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log.error(OperationUtils.class.getName() +
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}
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".cloneBean() encountered " +
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}
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" IllegalArgumentException invoking " +
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return newBean;
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beanMeths[i].getName(), iae);
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}
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throw new RuntimeException(iae);
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}
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} catch (NoSuchMethodException nsme){
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// ignore this field because there is no setter method
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}
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}
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}
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} catch (InstantiationException ie){
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log.error("edu.cornell.mannlib.vitro.edit.utils.OperationUtils.cloneBean("+bean.getClass().toString()+") could not instantiate new instance of bean.", ie);
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} catch (IllegalAccessException iae){
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log.error("edu.cornell.mannlib.vitro.edit.utils.OperationUtils.cloneBean("+bean.getClass().toString()+") encountered illegal access exception instantiating new bean.", iae);
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}
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return newBean;
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}
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}
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}
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@ -0,0 +1,431 @@
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/* $This file is distributed under the terms of the license in /doc/license.txt$ */
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package edu.cornell.mannlib.vedit.util;
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import static org.junit.Assert.assertEquals;
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import java.lang.reflect.InvocationTargetException;
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import java.util.HashMap;
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import java.util.Map;
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import org.hamcrest.BaseMatcher;
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import org.hamcrest.Description;
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import org.hamcrest.Matcher;
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import org.junit.Ignore;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.rules.ExpectedException;
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import edu.cornell.mannlib.vitro.testing.AbstractTestClass;
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/**
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* All of these tests are for OperationUtils.cloneBean()
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*/
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public class OperationUtils_CloneBeanTest extends AbstractTestClass {
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// ----------------------------------------------------------------------
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// Allow the tests to expect a RuntimeException with a particular cause.
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// ----------------------------------------------------------------------
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@Rule
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public ExpectedException thrown = ExpectedException.none();
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Matcher<?> causedBy(Class<? extends Throwable> causeClass) {
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return new CausedByMatcher(causeClass);
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}
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class CausedByMatcher extends BaseMatcher<Throwable> {
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private final Class<? extends Throwable> causeClass;
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public CausedByMatcher(Class<? extends Throwable> causeClass) {
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this.causeClass = causeClass;
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}
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@Override
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public boolean matches(Object actualThrowable) {
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if (!(actualThrowable instanceof RuntimeException)) {
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return false;
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}
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Throwable cause = ((RuntimeException) actualThrowable).getCause();
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return causeClass.isInstance(cause);
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}
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@Override
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public void describeTo(Description d) {
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d.appendText("RuntimeException caused by " + causeClass.getName());
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}
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}
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// ----------------------------------------------------------------------
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// Test for invalid classes
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// ----------------------------------------------------------------------
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@Test(expected = NullPointerException.class)
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public void nullArgument() {
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OperationUtils.cloneBean(null);
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}
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@Test(expected = NullPointerException.class)
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public void nullBean() {
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OperationUtils
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.cloneBean(null, SimpleSuccess.class, SimpleSuccess.class);
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}
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@Test(expected = NullPointerException.class)
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public void nullBeanClass() {
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OperationUtils
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.cloneBean(new SimpleSuccess(), null, SimpleSuccess.class);
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}
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@Test(expected = NullPointerException.class)
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public void nullInterfaceClass() {
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OperationUtils
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.cloneBean(new SimpleSuccess(), SimpleSuccess.class, null);
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}
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@Test(expected = IllegalAccessException.class)
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@Ignore("Why doesn't this throw an exception?")
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public void privateClass() {
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OperationUtils.cloneBean(new PrivateClass());
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}
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@Test
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public void privateConstructor() {
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thrown.expect(causedBy(NoSuchMethodException.class));
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OperationUtils.cloneBean(new PrivateConstructor());
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}
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@Test
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public void abstractClass() {
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thrown.expect(causedBy(InstantiationException.class));
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OperationUtils.cloneBean(new ConcreteOfAbstractClass(),
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AbstractClass.class, AbstractClass.class);
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}
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@Test
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public void interfaceClass() {
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thrown.expect(causedBy(InstantiationException.class));
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OperationUtils.cloneBean(new ConcreteOfInterfaceClass(),
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InterfaceClass.class, InterfaceClass.class);
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}
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@Test
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public void arrayClass() {
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thrown.expect(causedBy(NoSuchMethodException.class));
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OperationUtils.cloneBean(new String[0]);
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}
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@Test
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public void primitiveTypeClass() {
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thrown.expect(causedBy(NoSuchMethodException.class));
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OperationUtils.cloneBean(1, Integer.TYPE, Integer.TYPE);
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}
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@Test
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public void voidClass() {
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thrown.expect(causedBy(NoSuchMethodException.class));
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OperationUtils.cloneBean(new Object(), Void.TYPE, Void.TYPE);
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}
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@Test
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public void noNullaryConstructor() {
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thrown.expect(causedBy(NoSuchMethodException.class));
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OperationUtils.cloneBean(new NoNullaryConstructor(1));
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}
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@Test(expected = ExceptionInInitializerError.class)
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public void classThrowsExceptionWhenLoaded() {
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OperationUtils.cloneBean(new ThrowsExceptionWhenLoaded());
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}
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@Test
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public void initializerThrowsException() {
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thrown.expect(causedBy(InvocationTargetException.class));
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OperationUtils.cloneBean("random object",
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InitializerThrowsException.class,
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InitializerThrowsException.class);
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}
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@Test
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public void wrongInterfaceClass() {
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thrown.expect(causedBy(IllegalArgumentException.class));
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OperationUtils.cloneBean(new WrongConcreteClass(),
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WrongConcreteClass.class, WrongInterface.class);
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}
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@Test
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public void getThrowsException() {
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thrown.expect(causedBy(InvocationTargetException.class));
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OperationUtils.cloneBean(new GetMethodThrowsException());
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}
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@Test
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public void setThrowsException() {
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thrown.expect(causedBy(InvocationTargetException.class));
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OperationUtils.cloneBean(new SetMethodThrowsException());
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}
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private static class PrivateClass {
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public PrivateClass() {
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}
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}
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private static class PrivateConstructor {
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private PrivateConstructor() {
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}
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}
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||||||
|
public abstract static class AbstractClass {
|
||||||
|
public AbstractClass() {
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class ConcreteOfAbstractClass extends AbstractClass {
|
||||||
|
public ConcreteOfAbstractClass() {
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public abstract static class InterfaceClass {
|
||||||
|
public InterfaceClass() {
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class ConcreteOfInterfaceClass extends InterfaceClass {
|
||||||
|
public ConcreteOfInterfaceClass() {
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class NoNullaryConstructor {
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
public NoNullaryConstructor(int i) {
|
||||||
|
// nothing to do
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class ThrowsExceptionWhenLoaded {
|
||||||
|
static {
|
||||||
|
if (true)
|
||||||
|
throw new IllegalArgumentException();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class InitializerThrowsException {
|
||||||
|
{
|
||||||
|
if (true)
|
||||||
|
throw new IllegalStateException("Initializer throws exception");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class WrongConcreteClass {
|
||||||
|
private String junk = "junk";
|
||||||
|
|
||||||
|
public String getJunk() {
|
||||||
|
return this.junk;
|
||||||
|
}
|
||||||
|
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
private void setJunk(String junk) {
|
||||||
|
this.junk = junk;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static interface WrongInterface {
|
||||||
|
String getJunk();
|
||||||
|
|
||||||
|
void setJunk(String junk);
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class GetMethodThrowsException {
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
private String junk = "junk";
|
||||||
|
|
||||||
|
public String getJunk() {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setJunk(String junk) {
|
||||||
|
this.junk = junk;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class SetMethodThrowsException {
|
||||||
|
private String junk = "junk";
|
||||||
|
|
||||||
|
public String getJunk() {
|
||||||
|
return this.junk;
|
||||||
|
}
|
||||||
|
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
public void setJunk(String junk) {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// ----------------------------------------------------------------------
|
||||||
|
// Test simple success and innocuous variations
|
||||||
|
// ----------------------------------------------------------------------
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void simpleSuccess() {
|
||||||
|
expectSuccess(new SimpleSuccess().insertField("label", "a prize"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void getButNoSet() {
|
||||||
|
expectSuccess(new GetButNoSet().insertField("label", "shouldBeEqual"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void getTakesParameters() {
|
||||||
|
expectSuccess(new GetTakesParameters().insertField("label", "fine"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void getReturnsVoid() {
|
||||||
|
expectSuccess(new GetReturnsVoid().insertField("label", "fine"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void getAndSetDontMatch() {
|
||||||
|
expectSuccess(new GetAndSetDontMatch().insertField("label", "fine"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void getIsStatic() {
|
||||||
|
expectSuccess(new GetIsStatic().insertField("label", "fine")
|
||||||
|
.insertField("instanceJunk", "the junk"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void getMethodIsPrivate() {
|
||||||
|
expectSuccess(new GetMethodIsPrivate().insertField("label", "fine"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void setMethodIsPrivate() {
|
||||||
|
expectSuccess(new SetMethodIsPrivate().insertField("label", "fine"));
|
||||||
|
}
|
||||||
|
|
||||||
|
private void expectSuccess(BeanBase original) {
|
||||||
|
BeanBase cloned = (BeanBase) OperationUtils.cloneBean(original);
|
||||||
|
assertEquals("Simple success", original, cloned);
|
||||||
|
}
|
||||||
|
|
||||||
|
public static abstract class BeanBase {
|
||||||
|
protected final Map<String, Object> fields = new HashMap<>();
|
||||||
|
|
||||||
|
public BeanBase insertField(String key, Object value) {
|
||||||
|
if (value != null) {
|
||||||
|
fields.put(key, value);
|
||||||
|
}
|
||||||
|
return this;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public int hashCode() {
|
||||||
|
return fields.hashCode();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean equals(Object o) {
|
||||||
|
if (o == this) {
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
if (o == null) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
if (!this.getClass().equals(o.getClass())) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
return this.fields.equals(((BeanBase) o).fields);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public String toString() {
|
||||||
|
return this.getClass().getSimpleName() + fields;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class SimpleSuccess extends BeanBase {
|
||||||
|
public String getLabel() {
|
||||||
|
return (String) fields.get("label");
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setLabel(String label) {
|
||||||
|
insertField("label", label);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class GetButNoSet extends SimpleSuccess {
|
||||||
|
public String getJunk() {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class GetTakesParameters extends SimpleSuccess {
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
public String getJunk(String why) {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
public void setJunk(String junk) {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class GetReturnsVoid extends SimpleSuccess {
|
||||||
|
public void getJunk() {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
public void setJunk(String junk) {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class GetAndSetDontMatch extends SimpleSuccess {
|
||||||
|
public String getJunk() {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
public void setJunk(Integer junk) {
|
||||||
|
throw new UnsupportedOperationException();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class GetIsStatic extends SimpleSuccess {
|
||||||
|
public static String getJunk() {
|
||||||
|
return ("the junk");
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setJunk(String junk) {
|
||||||
|
insertField("instanceJunk", junk);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class GetMethodIsPrivate extends SimpleSuccess {
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
private String getJunk() {
|
||||||
|
return ("the junk");
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setJunk(String junk) {
|
||||||
|
insertField("instanceJunk", junk);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static class SetMethodIsPrivate extends SimpleSuccess {
|
||||||
|
public String getJunk() {
|
||||||
|
return ("the junk");
|
||||||
|
}
|
||||||
|
|
||||||
|
@SuppressWarnings("unused")
|
||||||
|
private void setJunk(String junk) {
|
||||||
|
insertField("instanceJunk", junk);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
Loading…
Add table
Reference in a new issue