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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* =============================================================================
* 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.
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
* ============LICENSE_END=========================================================
*/
package org.openecomp.appc.dg.common.impl;
import org.openecomp.appc.dao.util.DBUtils;
import org.openecomp.appc.rankingframework.AbstractRankedAttributesResolverFactory;
import org.openecomp.appc.rankingframework.ConfigurationEntry;
import org.openecomp.appc.rankingframework.ConfigurationSet;
import org.openecomp.appc.rankingframework.RankedAttributesResolver;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Collection;
import java.util.Iterator;
abstract class AbstractResolverDataReader {
private class ConfigurationSetAdaptor implements ConfigurationSet<FlowKey> {
private final ResultSet resultSet;
private class ResultSetIterator implements Iterator<ConfigurationEntry<FlowKey>>, ConfigurationEntry<FlowKey> {
@Override
public boolean hasNext() {
try {
return resultSet.next();
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
@Override
public ConfigurationEntry<FlowKey> next() {
return this;
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
@Override
public Object getAttributeValue(String name) {
try {
return resultSet.getObject(name);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
@Override
public FlowKey getResult() {
try {
return new FlowKey(resultSet.getString("dg_name"), resultSet.getString("dg_version"), resultSet.getString("dg_module"));
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
ConfigurationSetAdaptor(ResultSet resultSet) {
this.resultSet = resultSet;
}
@Override
public Iterable<ConfigurationEntry<FlowKey>> getEntries() {
return new Iterable<ConfigurationEntry<FlowKey>>() {
@Override
public Iterator<ConfigurationEntry<FlowKey>> iterator() {
return new ResultSetIterator();
}
};
}
@Override
public Collection<String> getRankedAttributeNames() {
return getAttributeNames();
}
}
protected abstract Collection<String> getAttributeNames();
protected abstract String getQueryStmt();
RankedAttributesResolver<FlowKey> read() {
try {
try (Connection conn = DBUtils.getConnection("sdnctl")) {
try (PreparedStatement stmt = conn.prepareStatement(getQueryStmt())) {
try (ResultSet res = stmt.executeQuery()) {
if (res.next()) {
res.beforeFirst();
ConfigurationSet<FlowKey> resolverConfig = new ConfigurationSetAdaptor(res);
return AbstractRankedAttributesResolverFactory.getInstance().create(resolverConfig);
} else {
throw new IllegalStateException();
}
}
}
}
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
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