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/*
* ============LICENSE_START=======================================================
* ONAP : ccsdk features
* ================================================================================
* Copyright (C) 2021 highstreet technologies GmbH Intellectual Property.
* 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.
* ============LICENSE_END=========================================================
*
*/
package org.onap.ccsdk.features.sdnr.wt.dataprovider.database.sqldb.query;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import org.eclipse.jdt.annotation.Nullable;
import org.onap.ccsdk.features.sdnr.wt.dataprovider.database.sqldb.database.SqlDBMapper;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.EntityInput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.SortOrder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.entity.input.Filter;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.entity.input.FilterBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.entity.input.FilterKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.entity.input.Pagination;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.entity.input.Sortorder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.data.provider.rev201110.entity.input.SortorderKey;
public class SelectQuery implements SqlQuery {
private static final long DEFAULT_PAGESIZE = 20;
private static final long DEFAULT_PAGE = 1;
private final String tableName;
private final List<Filter> filters;
private final List<String> sortExpressions;
private long page;
private long pageSize;
private final List<String> fields;
private final List<String> groups;
public SelectQuery(String tableName) {
this(tableName, Arrays.asList("*"), null);
}
public SelectQuery(String tableName, List<String> fields, String controllerId) {
this.tableName = tableName;
this.fields = fields;
this.filters = new ArrayList<>();
this.sortExpressions = new ArrayList<>();
this.groups = new ArrayList<>();
this.page = DEFAULT_PAGE;
this.pageSize = DEFAULT_PAGESIZE;
if (controllerId != null) {
this.addFilter(SqlDBMapper.ODLID_DBCOL, controllerId);
}
}
public SelectQuery(String tableName, String field, String controllerId) {
this(tableName, Arrays.asList(field), controllerId);
}
public SelectQuery(String tableName, EntityInput input) {
this(tableName, input, null);
}
public SelectQuery(String tableName, EntityInput input, String controllerId) {
this(tableName);
Map<FilterKey, Filter> filter = input != null ? input.getFilter() : null;
if (filter != null && filter.size() > 0) {
for (Filter f : filter.values()) {
this.addFilter(f.getProperty(), f.getFiltervalue());
}
}
if (controllerId != null) {
this.addFilter(SqlDBMapper.ODLID_DBCOL, controllerId);
}
Map<SortorderKey, Sortorder> so = input != null ? input.getSortorder() : null;
if (so != null && !so.isEmpty()) {
for (Sortorder s : so.values()) {
this.addSortOrder(s.getProperty(), s.getSortorder() == SortOrder.Ascending ? "ASC" : "DESC");
}
}
Pagination pagination = input != null ? input.getPagination() : null;
if (pagination != null) {
this.setPagination(pagination.getPage().longValue(), pagination.getSize().longValue());
} else {
this.setPagination(1, 30);
}
}
public void addFilter(String property, String filtervalue) {
this.filters.add(new FilterBuilder().setProperty(property).setFiltervalue(filtervalue).build());
}
public void addSortOrder(String col, String order) {
this.sortExpressions.add(String.format("`%s` %s", col, order));
}
public void setPagination(long page, long pageSize) {
this.page = page;
this.pageSize = pageSize;
}
public void setPagination(@Nullable Pagination pagination) {
long page = DEFAULT_PAGE;
long pageSize = DEFAULT_PAGESIZE;
if (pagination != null) {
if (pagination.getPage() != null) {
page = pagination.getPage().longValue();
}
if (pagination.getSize() != null) {
pageSize = pagination.getSize().longValue();
}
}
this.setPagination(page, pageSize);
}
@Override
public String toSql() {
StringBuilder sb = new StringBuilder();
if (this.fields.size() == 1 && this.fields.contains("*")) {
sb.append(String.format("SELECT * FROM `%s`", this.tableName));
} else {
sb.append(String.format("SELECT `%s` FROM `%s`", String.join("`,`", this.fields), this.tableName));
}
sb.append(SqlQuery.getWhereExpression(this.filters));
if (this.groups.size() > 0) {
sb.append(String.format(" GROUP BY `%s`", String.join("`,`", this.groups)));
}
if (this.sortExpressions.size() > 0) {
sb.append(" ORDER BY " + String.join(",", this.sortExpressions));
}
sb.append(String.format(" LIMIT %d,%d;", (this.page - 1) * this.pageSize, this.pageSize));
return sb.toString();
}
public long getPage() {
return this.page;
}
public long getPageSize() {
return this.pageSize;
}
public SelectQuery groupBy(String group) {
this.groups.add(group);
return this;
}
}
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