package com.thinkbiganalytics.metadata.jpa.support;
/*-
* #%L
* thinkbig-operational-metadata-jpa
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* 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.
* #L%
*/
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.querydsl.core.types.dsl.EntityPathBase;
import com.thinkbiganalytics.metadata.jpa.jobrepo.job.QJpaBatchJobExecution;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
/**
* Helper class to map simple filter strings to more complex filters/joins
*/
public class CommonFilterTranslations {
public static final String jobExecutionFeedNameFilterKey = "jobInstance.feed.name";
static final ImmutableMap<String, String> jobExecutionFilters =
new ImmutableMap.Builder<String, String>()
.put("feed", jobExecutionFeedNameFilterKey)
.put("feedName", jobExecutionFeedNameFilterKey)
.put("feedname", jobExecutionFeedNameFilterKey)
.put("jobName", "jobInstance.jobName")
.put("jobStartTime", "startTimeMillis")
.put("jobEndTime", "endTimeMillis")
.put("startTime", "startTimeMillis")
.put("endTime", "endTimeMillis")
.put("starttime", "startTimeMillis")
.put("endtime", "endTimeMillis")
.put("executionId", "jobExecutionId")
.put("executionid", "jobExecutionId")
.put("job", "jobInstance.jobName").build();
static final ImmutableList<String> dateToMillisFields =
new ImmutableList.Builder<String>()
.add("jobStartTime")
.add("startTime")
.add("starttime")
.add("jobEndTime")
.add("endTime")
.add("endtime")
.add("startTimeMillis")
.add("endTimeMillis").build();
static final ImmutableMap<Class<? extends EntityPathBase>, Map<String, String>>
queryDslFilters =
new ImmutableMap.Builder<Class<? extends EntityPathBase>, Map<String, String>>().put(QJpaBatchJobExecution.class, jobExecutionFilters).build();
public static boolean isDateStoredAsMillisField(String filterField) {
return dateToMillisFields.contains(filterField);
}
/**
* Check to see if the incoming path,column exist as a filter that should be resolved to a more complex string
*/
public static boolean containsFilterMappings(EntityPathBase basePath, String column) {
return containsFilterMappings(basePath.getClass(), column);
}
/**
* if the supplied column matches a common filter for the incoming {@code basePath} object it will resolve the column to the correct filter
* otherwise it will return the column
*/
public static String resolvedFilter(EntityPathBase basePath, String column) {
if (containsFilterMappings(basePath, column)) {
return queryDslFilters.get(basePath.getClass()).get(column);
}
return column;
}
/**
* If the incoming {@code column} matches as a key to a more complex filter this will return the more complex filter/column needed for the Join or Sort. Otherwise it will return the {@code
* column} as the filter string
*/
public static String getResolvedJobExecutionFilter(String column) {
return getResolvedFilter(QJpaBatchJobExecution.class, column);
}
private static String getResolvedFilter(Class<? extends EntityPathBase> clazz, String column) {
if (containsFilterMappings(clazz, column)) {
return queryDslFilters.get(clazz).get(column);
}
return null;
}
private static boolean containsFilterMappings(Class<? extends EntityPathBase> clazz, String column) {
return queryDslFilters.containsKey(clazz) && queryDslFilters.get(clazz).containsKey(column);
}
/**
* Update the Pageable sort filter and resolve any filter strings if needed
*/
public static Pageable resolveSortFilters(EntityPathBase base, Pageable pageable) {
if (pageable != null && pageable.getSort() != null) {
List<Sort.Order> sortList = Lists.newArrayList(pageable.getSort().iterator());
boolean anyMatch = sortList.stream().anyMatch(order -> containsFilterMappings(base, order.getProperty()));
//if there is a match reconstruct pageable
if (anyMatch) {
List<Sort.Order> updatedSortOrder = sortList.stream().map(order -> new Sort.Order(order.getDirection(), resolvedFilter(base, order.getProperty()))).collect(Collectors.toList());
Sort sort = new Sort(updatedSortOrder);
Pageable updatedPageable = new PageRequest(pageable.getPageNumber(), pageable.getPageSize(), sort);
return updatedPageable;
}
}
return pageable;
}
}