Post date: Jun 18, 2013 10:04:49 AM
Will check equality of all fields of any entity.
Note: Only values from getters will be compared
import java.beans.IntrospectionException;import java.beans.Introspector;import java.beans.PropertyDescriptor;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;public class EqualComparer { public static boolean isEqual(final Object a, final Object b) { if (!isTypeEqual(a, b)) { return false; } Object valueA; Object valueB; try { // Get all getters of the objects PropertyDescriptor[] descriptors = Introspector.getBeanInfo(a.getClass(), Object.class).getPropertyDescriptors(); if (descriptors.length == 0) { // no getters, compare them as they are. if (!compare(a, b)) { return false; } } else { for (PropertyDescriptor propertyDescriptor : descriptors) { Method m = propertyDescriptor.getReadMethod(); valueA = m.invoke(a, (Object[]) null); valueB = m.invoke(b, (Object[]) null); if (!compare(valueA, valueB)) { System.out.println(m.getName() + ": [" + valueA + "] = [" + valueB + "]"); return false; } } } } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException | IntrospectionException e) { e.printStackTrace(); return false; } return true; } private static boolean areBothNull(final Object a, final Object b) { return (a == null && b == null); } private static boolean isTypeEqual(final Object a, final Object b) { if (areBothNull(a, b)) { return false; } return a.getClass().equals(b.getClass()); } private static boolean compare(final Object a, final Object b) { if (a == null) { return false; } else if (b == null) { return false; } return a.equals(b); }}