| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| package org.apache.deltaspike.data.impl.builder.result; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import javax.persistence.FlushModeType; |
| import javax.persistence.LockModeType; |
| import javax.persistence.NoResultException; |
| import javax.persistence.Query; |
| import javax.persistence.metamodel.SingularAttribute; |
| |
| import org.apache.deltaspike.data.api.QueryResult; |
| import org.apache.deltaspike.data.impl.builder.OrderDirection; |
| import org.apache.deltaspike.data.impl.builder.QueryBuilder; |
| import org.apache.deltaspike.data.impl.builder.postprocessor.CountQueryPostProcessor; |
| import org.apache.deltaspike.data.impl.builder.postprocessor.FirstResultPostProcessor; |
| import org.apache.deltaspike.data.impl.builder.postprocessor.FlushModePostProcessor; |
| import org.apache.deltaspike.data.impl.builder.postprocessor.HintPostProcessor; |
| import org.apache.deltaspike.data.impl.builder.postprocessor.LockModePostProcessor; |
| import org.apache.deltaspike.data.impl.builder.postprocessor.MaxResultPostProcessor; |
| import org.apache.deltaspike.data.impl.builder.postprocessor.OrderByQueryStringPostProcessor; |
| import org.apache.deltaspike.data.impl.handler.CdiQueryInvocationContext; |
| import org.apache.deltaspike.data.impl.handler.QueryStringPostProcessor; |
| |
| public class DefaultQueryResult<T> implements QueryResult<T> |
| { |
| |
| private final QueryBuilder builder; |
| private final CdiQueryInvocationContext context; |
| |
| private int page = 0; |
| private int pageSize = 10; |
| |
| public DefaultQueryResult(QueryBuilder builder, CdiQueryInvocationContext context) |
| { |
| this.builder = builder; |
| this.context = context; |
| } |
| |
| @Override |
| public <X> QueryResult<T> orderAsc(SingularAttribute<T, X> attribute) |
| { |
| return orderAsc(attribute, true); |
| } |
| |
| @Override |
| public <X> QueryResult<T> orderAsc(SingularAttribute<T, X> attribute, boolean appendEntityName) |
| { |
| context.addQueryStringPostProcessor(new OrderByQueryStringPostProcessor(attribute, OrderDirection.ASC, |
| appendEntityName)); |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> orderAsc(String attribute) |
| { |
| return orderAsc(attribute, true); |
| } |
| |
| @Override |
| public QueryResult<T> orderAsc(String attribute, boolean appendEntityName) |
| { |
| context.addQueryStringPostProcessor(new OrderByQueryStringPostProcessor(attribute, OrderDirection.ASC, |
| appendEntityName)); |
| return this; |
| } |
| |
| @Override |
| public <X> QueryResult<T> orderDesc(SingularAttribute<T, X> attribute) |
| { |
| return orderDesc(attribute, true); |
| } |
| |
| @Override |
| public <X> QueryResult<T> orderDesc(SingularAttribute<T, X> attribute, boolean appendEntityName) |
| { |
| context.addQueryStringPostProcessor(new OrderByQueryStringPostProcessor(attribute, OrderDirection.DESC, |
| appendEntityName)); |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> orderDesc(String attribute) |
| { |
| return orderDesc(attribute, true); |
| } |
| |
| @Override |
| public QueryResult<T> orderDesc(String attribute, boolean appendEntityName) |
| { |
| context.addQueryStringPostProcessor(new OrderByQueryStringPostProcessor(attribute, OrderDirection.DESC, |
| appendEntityName)); |
| return this; |
| } |
| |
| @Override |
| public <X> QueryResult<T> changeOrder(final SingularAttribute<T, X> attribute) |
| { |
| changeOrder(new ChangeOrder() |
| { |
| @Override |
| public boolean matches(OrderByQueryStringPostProcessor orderBy) |
| { |
| return orderBy.matches(attribute); |
| } |
| |
| @Override |
| public void addDefault() |
| { |
| orderAsc(attribute); |
| } |
| }); |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> changeOrder(final String attribute) |
| { |
| changeOrder(new ChangeOrder() |
| { |
| @Override |
| public boolean matches(OrderByQueryStringPostProcessor orderBy) |
| { |
| return orderBy.matches(attribute); |
| } |
| |
| @Override |
| public void addDefault() |
| { |
| orderAsc(attribute); |
| } |
| }); |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> clearOrder() |
| { |
| for (Iterator<QueryStringPostProcessor> it = context.getQueryStringPostProcessors().iterator(); it.hasNext();) |
| { |
| if (it.next() instanceof OrderByQueryStringPostProcessor) |
| { |
| it.remove(); |
| } |
| } |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> maxResults(int max) |
| { |
| context.addJpaQueryPostProcessor(new MaxResultPostProcessor(max)); |
| pageSize = max; |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> firstResult(int first) |
| { |
| context.addJpaQueryPostProcessor(new FirstResultPostProcessor(first)); |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> lockMode(LockModeType lockMode) |
| { |
| context.addJpaQueryPostProcessor(new LockModePostProcessor(lockMode)); |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> flushMode(FlushModeType flushMode) |
| { |
| context.addJpaQueryPostProcessor(new FlushModePostProcessor(flushMode)); |
| return this; |
| } |
| |
| @Override |
| public QueryResult<T> hint(String hint, Object value) |
| { |
| context.addJpaQueryPostProcessor(new HintPostProcessor(hint, value)); |
| return this; |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public List<T> getResultList() |
| { |
| return ((Query) builder.executeQuery(context)).getResultList(); |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public T getSingleResult() |
| { |
| return (T) ((Query) builder.executeQuery(context)).getSingleResult(); |
| } |
| |
| @Override |
| public T getOptionalResult() |
| { |
| try |
| { |
| return getSingleResult(); |
| } |
| catch (NoResultException e) |
| { |
| return null; |
| } |
| } |
| |
| @Override |
| public T getAnyResult() |
| { |
| List<T> queryResult = getResultList(); |
| return queryResult.size() > 0 ? queryResult.get(0) : null; |
| } |
| |
| @Override |
| public long count() |
| { |
| CountQueryPostProcessor counter = new CountQueryPostProcessor(); |
| context.addJpaQueryPostProcessor(counter); |
| try |
| { |
| Long result = (Long) ((Query) builder.executeQuery(context)).getSingleResult(); |
| return result.intValue(); |
| } |
| catch (RuntimeException e) |
| { |
| throw e; |
| } |
| catch (Exception e) |
| { |
| throw new RuntimeException(e); |
| } |
| finally |
| { |
| context.removeJpaQueryPostProcessor(counter); |
| } |
| } |
| |
| @Override |
| public QueryResult<T> withPageSize(int pageSize) |
| { |
| return maxResults(pageSize); |
| } |
| |
| @Override |
| public QueryResult<T> toPage(int page) |
| { |
| this.page = page; |
| return firstResult(pageSize * page); |
| } |
| |
| @Override |
| public QueryResult<T> nextPage() |
| { |
| page = page + 1; |
| return firstResult(pageSize * page); |
| } |
| |
| @Override |
| public QueryResult<T> previousPage() |
| { |
| page = page > 0 ? page - 1 : page; |
| return firstResult(pageSize * page); |
| } |
| |
| @Override |
| public int countPages() |
| { |
| return (int) Math.ceil((double) count() / pageSize); |
| } |
| |
| @Override |
| public int currentPage() |
| { |
| return page; |
| } |
| |
| @Override |
| public int pageSize() |
| { |
| return pageSize; |
| } |
| |
| private <X> QueryResult<T> changeOrder(ChangeOrder changeOrder) |
| { |
| for (QueryStringPostProcessor processor : context.getQueryStringPostProcessors()) |
| { |
| if (processor instanceof OrderByQueryStringPostProcessor) |
| { |
| OrderByQueryStringPostProcessor orderBy = (OrderByQueryStringPostProcessor) processor; |
| if (changeOrder.matches(orderBy)) |
| { |
| orderBy.changeDirection(); |
| return this; |
| } |
| } |
| } |
| changeOrder.addDefault(); |
| return this; |
| } |
| |
| private abstract static class ChangeOrder |
| { |
| |
| public abstract boolean matches(OrderByQueryStringPostProcessor orderBy); |
| |
| public abstract void addDefault(); |
| |
| } |
| |
| } |