Java tutorial
/** * Copyright © 2012-2013 Zaric All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); */ package apm.common.core; import java.io.IOException; import java.lang.reflect.Field; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import apm.common.utils.Reflections; import apm.common.utils.StringUtils; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.queryParser.ParseException; import org.apache.lucene.queryParser.QueryParser; import org.apache.lucene.search.BooleanClause; import org.apache.lucene.search.BooleanClause.Occur; import org.apache.lucene.search.BooleanQuery; import org.apache.lucene.search.QueryWrapperFilter; import org.apache.lucene.search.Sort; import org.apache.lucene.search.highlight.Formatter; import org.apache.lucene.search.highlight.Highlighter; import org.apache.lucene.search.highlight.InvalidTokenOffsetsException; import org.apache.lucene.search.highlight.QueryScorer; import org.apache.lucene.search.highlight.SimpleFragmenter; import org.apache.lucene.search.highlight.SimpleHTMLFormatter; import org.apache.lucene.util.Version; import org.hibernate.Criteria; import org.hibernate.Query; import org.hibernate.SQLQuery; import org.hibernate.Session; import org.hibernate.criterion.Criterion; import org.hibernate.criterion.DetachedCriteria; import org.hibernate.criterion.Order; import org.hibernate.criterion.Projections; import org.hibernate.internal.CriteriaImpl; import org.hibernate.search.FullTextQuery; import org.hibernate.search.FullTextSession; import org.hibernate.search.Search; import org.hibernate.search.filter.impl.CachingWrapperFilter; import org.hibernate.search.query.DatabaseRetrievalMethod; import org.hibernate.search.query.ObjectLookupMethod; import org.hibernate.transform.ResultTransformer; import org.hibernate.transform.Transformers; import org.wltea.analyzer.lucene.IKAnalyzer; /** * DAO? * @author resite * @version 2013-05-15 * @param <T> */ public class DaoImpl<T extends IdEntity<String>> implements Dao<T> { /** * ?? */ @PersistenceContext private EntityManager entityManager; /** * () */ private Class<?> entityClass; /** * ?? */ public DaoImpl() { entityClass = Reflections.getClassGenricType(getClass()); } /** * ?? */ public EntityManager getEntityManager() { return entityManager; } /** * ? Session */ public Session getSession() { return (Session) getEntityManager().getDelegate(); } /** * ?? */ public void flush() { getSession().flush(); } /** * ? */ public void clear() { getSession().clear(); } // -------------- QL Query -------------- /** * QL * @param page * @param qlString * @param parameter * @return */ @SuppressWarnings("unchecked") public <E> Page<E> find(Page<E> page, String qlString, Object... parameter) { // get count if (!page.isDisabled() && !page.isNotCount()) { String countQlString = "select count(*) " + removeSelect(removeOrders(qlString)); // page.setCount(Long.valueOf(createQuery(countQlString, parameter).uniqueResult().toString())); Query query = createQuery(countQlString, parameter); List<Object> list = query.list(); if (list.size() > 0) { page.setCount(Long.valueOf(list.get(0).toString())); } else { page.setCount(list.size()); } if (page.getCount() < 1) { return page; } } // order by String ql = qlString; if (StringUtils.isNotBlank(page.getOrderBy())) { ql += " order by " + page.getOrderBy(); } Query query = createQuery(ql, parameter); // set page if (!page.isDisabled()) { query.setFirstResult(page.getFirstResult()); query.setMaxResults(page.getMaxResults()); } page.setList(query.list()); return page; } /** * QL * @param qlString * @param parameter * @return */ @SuppressWarnings("unchecked") public <E> List<E> find(String qlString, Object... parameter) { Query query = createQuery(qlString, parameter); return query.list(); } /** * QL * @param qlString * @param parameter * @return */ public int update(String qlString, Object... parameter) { return createQuery(qlString, parameter).executeUpdate(); } /** * QL * @param qlString * @param parameter * @return */ public Query createQuery(String qlString, Object... parameter) { Query query = getSession().createQuery(qlString); setParameter(query, parameter); return query; } // -------------- SQL Query -------------- /** * SQL * @param page * @param sqlString * @param parameter * @return */ public <E> Page<E> findBySql(Page<E> page, String sqlString, Object... parameter) { return findBySql(page, sqlString, null, parameter); } /** * SQL * @param page * @param sqlString * @param resultClass * @param parameter * @return */ @SuppressWarnings("unchecked") public <E> Page<E> findBySql(Page<E> page, String sqlString, Class<?> resultClass, Object... parameter) { // get count if (!page.isDisabled() && !page.isNotCount()) { String countSqlString = "select count(*) " + removeSelect(removeOrders(sqlString)); // page.setCount(Long.valueOf(createSqlQuery(countSqlString, parameter).uniqueResult().toString())); Query query = createSqlQuery(countSqlString, parameter); List<Object> list = query.list(); if (list.size() > 0) { page.setCount(Long.valueOf(list.get(0).toString())); } else { page.setCount(list.size()); } if (page.getCount() < 1) { return page; } } // order by String sql = sqlString; if (StringUtils.isNotBlank(page.getOrderBy())) { sql += " order by " + page.getOrderBy(); } SQLQuery query = createSqlQuery(sql, parameter); // set page if (!page.isDisabled()) { query.setFirstResult(page.getFirstResult()); query.setMaxResults(page.getMaxResults()); } setResultTransformer(query, resultClass); page.setList(query.list()); return page; } /** * SQL * @param sqlString * @param parameter * @return */ public <E> List<E> findBySql(String sqlString, Object... parameter) { return findBySql(sqlString, null, parameter); } /** * SQL * @param sqlString * @param resultClass * @param parameter * @return */ @SuppressWarnings("unchecked") public <E> List<E> findBySql(String sqlString, Class<?> resultClass, Object... parameter) { SQLQuery query = createSqlQuery(sqlString, parameter); setResultTransformer(query, resultClass); return query.list(); } /** * SQL * @param sqlString * @param parameter * @return */ public int updateBySql(String sqlString, Object... parameter) { return createSqlQuery(sqlString, parameter).executeUpdate(); } /** * SQL * @param sqlString * @param parameter * @return */ public SQLQuery createSqlQuery(String sqlString, Object... parameter) { SQLQuery query = getSession().createSQLQuery(sqlString); setParameter(query, parameter); return query; } // -------------- Query Tools -------------- /** * * @param query * @param resultClass */ private void setResultTransformer(SQLQuery query, Class<?> resultClass) { if (resultClass != null) { if (resultClass == Map.class) { query.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP); } else if (resultClass == List.class) { query.setResultTransformer(Transformers.TO_LIST); } else { query.addEntity(resultClass); } } } /** * ? * @param query * @param parameter */ private void setParameter(Query query, Object... parameter) { if (parameter != null) { for (int i = 0; i < parameter.length; i++) { query.setParameter(i, parameter[i]); } } } /** * qlStringselect?? * @param hql * @return */ private String removeSelect(String qlString) { int beginPos = qlString.toLowerCase().indexOf("from"); return qlString.substring(beginPos); } /** * hqlorderBy?? * @param hql * @return */ private String removeOrders(String qlString) { Pattern p = Pattern.compile("order\\s*by[\\w|\\W|\\s|\\S]*", Pattern.CASE_INSENSITIVE); Matcher m = p.matcher(qlString); StringBuffer sb = new StringBuffer(); while (m.find()) { m.appendReplacement(sb, ""); } m.appendTail(sb); return sb.toString(); } // -------------- Criteria -------------- /** * * @param page * @return */ public Page<T> find(Page<T> page) { return find(page, createDetachedCriteria()); } /** * * @param page * @param detachedCriteria * @param resultTransformer * @return */ public Page<T> find(Page<T> page, DetachedCriteria detachedCriteria) { return find(page, detachedCriteria, Criteria.DISTINCT_ROOT_ENTITY); } /** * * @param page * @param detachedCriteria * @param resultTransformer * @return */ @SuppressWarnings("unchecked") public Page<T> find(Page<T> page, DetachedCriteria detachedCriteria, ResultTransformer resultTransformer) { // get count if (!page.isDisabled() && !page.isNotCount()) { page.setCount(count(detachedCriteria)); if (page.getCount() < 1) { return page; } } Criteria criteria = detachedCriteria.getExecutableCriteria(getSession()); criteria.setResultTransformer(resultTransformer); // set page if (!page.isDisabled()) { criteria.setFirstResult(page.getFirstResult()); criteria.setMaxResults(page.getMaxResults()); } // order by if (StringUtils.isNotBlank(page.getOrderBy())) { for (String order : StringUtils.split(page.getOrderBy(), ",")) { String[] o = StringUtils.split(order, " "); if (o.length == 1) { criteria.addOrder(Order.asc(o[0])); } else if (o.length == 2) { if ("DESC".equals(o[1].toUpperCase())) { criteria.addOrder(Order.desc(o[0])); } else { criteria.addOrder(Order.asc(o[0])); } } } } page.setList(criteria.list()); return page; } /** * * @param detachedCriteria * @return */ public List<T> find(DetachedCriteria detachedCriteria) { return find(detachedCriteria, Criteria.DISTINCT_ROOT_ENTITY); } /** * * @param detachedCriteria * @param resultTransformer * @return */ @SuppressWarnings("unchecked") public List<T> find(DetachedCriteria detachedCriteria, ResultTransformer resultTransformer) { Criteria criteria = detachedCriteria.getExecutableCriteria(getSession()); criteria.setResultTransformer(resultTransformer); return criteria.list(); } /** * * @param detachedCriteria * @return */ @SuppressWarnings("rawtypes") public long count(DetachedCriteria detachedCriteria) { Criteria criteria = detachedCriteria.getExecutableCriteria(getSession()); long totalCount = 0; try { // Get orders Field field = CriteriaImpl.class.getDeclaredField("orderEntries"); field.setAccessible(true); List orderEntrys = (List) field.get(criteria); // Remove orders field.set(criteria, new ArrayList()); // Get count criteria.setProjection(Projections.rowCount()); totalCount = Long.valueOf(criteria.uniqueResult().toString()); // Clean count criteria.setProjection(null); // Restore orders field.set(criteria, orderEntrys); } catch (NoSuchFieldException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } return totalCount; } /** * ? * @param criterions Restrictions.eq("name", value); * @return */ public DetachedCriteria createDetachedCriteria(Criterion... criterions) { DetachedCriteria dc = DetachedCriteria.forClass(entityClass); for (Criterion c : criterions) { dc.add(c); } return dc; } // -------------- Hibernate search -------------- /** * ?Session */ public FullTextSession getFullTextSession() { return Search.getFullTextSession(getSession()); } /** * */ public void createIndex() { try { getFullTextSession().createIndexer(entityClass).startAndWait(); } catch (InterruptedException e) { e.printStackTrace(); } } /** * * @param page * @param query * @param queryFilter * @param sort ? * @return */ @SuppressWarnings("unchecked") public Page<T> search(Page<T> page, BooleanQuery query, BooleanQuery queryFilter, Sort sort) { // FullTextQuery fullTextQuery = getFullTextSession().createFullTextQuery(query, entityClass); // fullTextQuery.setFilter(new CachingWrapperFilter(new QueryWrapperFilter(queryFilter))); // ? fullTextQuery.setSort(sort); // page.setCount(fullTextQuery.getResultSize()); fullTextQuery.setFirstResult(page.getFirstResult()); fullTextQuery.setMaxResults(page.getMaxResults()); // ?? fullTextQuery.initializeObjectsWith(ObjectLookupMethod.SECOND_LEVEL_CACHE, DatabaseRetrievalMethod.QUERY); // page.setList(fullTextQuery.list()); return page; } /** * ? */ public BooleanQuery getFullTextQuery(BooleanClause... booleanClauses) { BooleanQuery booleanQuery = new BooleanQuery(); for (BooleanClause booleanClause : booleanClauses) { booleanQuery.add(booleanClause); } return booleanQuery; } /** * ? * @param q * @param fields * @return */ public BooleanQuery getFullTextQuery(String q, String... fields) { Analyzer analyzer = new IKAnalyzer(); BooleanQuery query = new BooleanQuery(); try { if (StringUtils.isNotBlank(q)) { for (String field : fields) { QueryParser parser = new QueryParser(Version.LUCENE_36, field, analyzer); query.add(parser.parse(q), Occur.SHOULD); } } } catch (ParseException e) { e.printStackTrace(); } return query; } /** * * @param query * @param list * @param fields ?? */ public List<T> keywordsHighlight(BooleanQuery query, List<T> list, String... fields) { Analyzer analyzer = new IKAnalyzer(); Formatter formatter = new SimpleHTMLFormatter("<span class=\"highlight\">", "</span>"); Highlighter highlighter = new Highlighter(formatter, new QueryScorer(query)); highlighter.setTextFragmenter(new SimpleFragmenter(130)); for (T entity : list) { try { for (String field : fields) { String text = StringUtils.replaceHtml((String) Reflections.invokeGetter(entity, field)); String description = highlighter.getBestFragment(analyzer, field, text); if (description != null) { Reflections.invokeSetter(entity, fields[0], description); break; } Reflections.invokeSetter(entity, fields[0], StringUtils.abbr(text, 130)); } //Reflections.invokeSetter(entity, fields[1], "sdfkjsdlkfjklsdjf"); } catch (IOException e) { e.printStackTrace(); } catch (InvalidTokenOffsetsException e) { e.printStackTrace(); } } return list; } /** * ??ASC?? * @return */ @Override public List<T> findNodes() { return find("from " + entityClass.getSimpleName() + " where delFlag=? ", T.DEL_FLAG_NORMAL); } }