Java tutorial
/* * Copyright (c) 2005-2011 Grameen Foundation USA * All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or * implied. See the License for the specific language governing * permissions and limitations under the License. * * See also http://www.apache.org/licenses/LICENSE-2.0.html for an * explanation of the license and how it is applied. */ package org.mifos.framework.components.audit.util.helpers; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Set; import org.hibernate.EmptyInterceptor; import org.hibernate.Transaction; import org.mifos.application.servicefacade.ApplicationContextProvider; import org.mifos.application.util.helpers.EntityType; import org.mifos.framework.business.AbstractBusinessObject; import org.mifos.framework.components.audit.business.AuditLog; import org.mifos.framework.components.audit.business.AuditLogRecord; import org.mifos.framework.components.audit.persistence.LegacyAuditDao; import org.mifos.framework.util.DateTimeService; import org.mifos.security.util.UserContext; /* * For Hibernate 3.2.2 or so, we'd just extend EmptyInterceptor. * But that doesn't exist in 3.0 beta4. */ public class AuditInterceptor extends EmptyInterceptor { private AuditLog auditLog; private InterceptHelper interceptHelper; private UserContext userContext; private Boolean flag = false; public AuditInterceptor() { interceptHelper = new InterceptHelper(); } public void createInitialValueMap(Object object) { userContext = ((AbstractBusinessObject) object).getUserContext(); interceptHelper.hibernateMeta(object, AuditConstants.TRANSACTIONBEGIN); } public void createChangeValueMap(Object object) { if (interceptHelper.getEntityName() .equals(AuditConfiguration.getEntityToClassPath(object.getClass().getName()))) { interceptHelper.hibernateMeta(object, AuditConstants.TRANSACTIONEND); } } public boolean isAuditLogRequired() { if (interceptHelper.isInitialValueMapEmpty()) { return false; } return true; } @Override public void afterTransactionCompletion(Transaction tx) { if (tx != null && tx.wasCommitted() && !tx.wasRolledBack()) { flag = true; } if (flag && ((interceptHelper.getInitialValueMap() != null && interceptHelper.getInitialValueMap().size() > 0) || (interceptHelper.getChangeValueMap() != null && interceptHelper.getChangeValueMap().size() > 0))) { auditLog = new AuditLog(interceptHelper.getEntityId(), EntityType.getEntityValue(interceptHelper.getEntityName().toUpperCase()), userContext.getName(), new DateTimeService().getCurrentJavaSqlDate(), userContext.getId()); Set<AuditLogRecord> auditLogRecords = createAuditLogRecord(); auditLog.addAuditLogRecords(auditLogRecords); if (!auditLogRecords.isEmpty()) { ApplicationContextProvider.getBean(LegacyAuditDao.class).save(auditLog); } } } private Set<AuditLogRecord> createAuditLogRecord() { Set<AuditLogRecord> auditLogRecords = new HashSet<AuditLogRecord>(); Set set = interceptHelper.getPropertyNames().keySet(); Iterator iterator = set.iterator(); while (iterator.hasNext()) { AuditLogRecord auditLogRecord = null; Object key = iterator.next(); if ((key.toString()).toLowerCase().contains(AuditConstants.VERSIONNO) || (key.toString()).toLowerCase().contains(AuditConstants.CREATEDBY) || (key.toString()).toLowerCase().contains(AuditConstants.CREATEDDATE) || (key.toString()).toLowerCase().contains(AuditConstants.UPDATEDBY) || (key.toString()).toLowerCase().contains(AuditConstants.UPDATEDDATE) || (key.toString()).toLowerCase().contains(AuditConstants.LOOKUPID)) { continue; } if (interceptHelper.getInitialValue(key) != null && !interceptHelper.getInitialValue(key).toString().trim().equals("") && interceptHelper.getChangeValue(key) == null && !interceptHelper.getPropertyName(key) .toString().equalsIgnoreCase(XMLConstants.DONOTLOGTHISPROPERTY)) { auditLogRecord = new AuditLogRecord(interceptHelper.getPropertyName(key).toString().trim(), removeComma(interceptHelper.getInitialValue(key).toString()), "-", auditLog); auditLogRecords.add(auditLogRecord); } else if (interceptHelper.getInitialValue(key) == null && interceptHelper.getChangeValue(key) != null && !interceptHelper.getChangeValue(key).toString().equals("") && !interceptHelper .getPropertyName(key).toString().equalsIgnoreCase(XMLConstants.DONOTLOGTHISPROPERTY)) { auditLogRecord = new AuditLogRecord(interceptHelper.getPropertyName(key).toString().trim(), "-", removeComma(interceptHelper.getChangeValue(key).toString()), auditLog); auditLogRecords.add(auditLogRecord); } else if (interceptHelper.getChangeValue(key) != null && interceptHelper.getInitialValue(key) != null && !(interceptHelper.getChangeValue(key).toString()) .equals(interceptHelper.getInitialValue(key).toString()) && (compareSet(interceptHelper.getInitialValue(key).toString(), interceptHelper.getChangeValue(key).toString()) == false) && !interceptHelper.getPropertyName(key).toString() .equalsIgnoreCase(XMLConstants.DONOTLOGTHISPROPERTY)) { String newValue = null; if (interceptHelper.getChangeValue(key).toString().trim().equals("")) { newValue = "-"; } else { newValue = removeComma(interceptHelper.getChangeValue(key).toString()); } String oldValue = null; if (interceptHelper.getInitialValue(key).toString().trim().equals("")) { oldValue = "-"; } else { oldValue = removeComma(interceptHelper.getInitialValue(key).toString()); } if (AuditConstants.Audit_PASSWORD.equals(key)) { oldValue = "xxx"; newValue = "xxx"; } auditLogRecord = new AuditLogRecord(interceptHelper.getPropertyName(key).toString().trim(), oldValue, newValue, auditLog); auditLogRecords.add(auditLogRecord); } } return auditLogRecords; } private boolean compareSet(String initialString, String changeString) { if (initialString.trim().startsWith(",")) { initialString = initialString.substring(1, initialString.length()); } if (initialString.trim().endsWith(",")) { initialString = initialString.substring(0, initialString.length() - 1); } if (changeString.trim().startsWith(",")) { changeString = changeString.substring(1, changeString.length()); } if (changeString.trim().endsWith(",")) { changeString = changeString.substring(0, changeString.length() - 1); } String[] initialCollectionOfStrings = initialString.split(","); String[] changedCollectionOfStrings = changeString.split(","); if (initialCollectionOfStrings.length != changedCollectionOfStrings.length) { return false; } int initialCollectionCount = 0; int changedCollectionCount = 0; List<String> initialList = new ArrayList<String>(); for (String initialCollectionOfString : initialCollectionOfStrings) { initialList.add(initialCollectionOfString); } List<String> changeList = new ArrayList<String>(); for (String changedCollectionOfString : changedCollectionOfStrings) { changeList.add(changedCollectionOfString); } for (String initialValue : initialList) { initialCollectionCount++; for (Iterator<String> iterator = changeList.iterator(); iterator.hasNext();) { String changeValue = iterator.next(); if (changeValue.equals(initialValue)) { iterator.remove(); changedCollectionCount++; } } } if (initialCollectionCount == changedCollectionCount) { return true; } else { return false; } } private String removeComma(String string) { string = string.trim(); if (string.startsWith(",")) { string = string.substring(1, string.length()); } if (string.endsWith(",")) { string = string.substring(0, string.length() - 1); } return string; } }