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/*-
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright (C) 2017 AT&T 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.dmaap.dbcapi.database;
import java.sql.*;
import java.util.*;
public class DBMap<C> extends TableHandler<C> implements Map<String, C> {
public DBMap(Class<C> cls, String tabname, String keyfield) throws Exception {
this(ConnectionFactory.getDefaultInstance(), cls, tabname, keyfield);
}
public DBMap(ConnectionFactory cf, Class<C> cls, String tabname, String keyfield) throws Exception {
super(cf, cls, tabname, keyfield);
}
public void clear() {
throw new UnsupportedOperationException();
}
public boolean containsKey(Object key) {
return(get(key) != null);
}
public boolean containsValue(Object value) {
throw new UnsupportedOperationException();
}
public boolean isEmpty() {
return(false);
}
public Set<Map.Entry<String, C>> entrySet() {
return(list());
}
public Set<String> keySet() {
Set<String> ret = new HashSet<>();
for (Map.Entry<String, C> x: list()) {
ret.add(x.getKey());
}
return(ret);
}
public void putAll(Map<? extends String, ? extends C> m) {
throw new UnsupportedOperationException();
}
public int size() {
return(2);
}
public Collection<C> values() {
Collection<C> ret = new ArrayList<>();
for (Map.Entry<String, C> x: list()) {
ret.add(x.getValue());
}
return(ret);
}
public C get(Object key) {
if (!(key instanceof String)) {
return(null);
}
return((new ConnWrapper<C, String>() {
protected C run(String key) throws Exception {
ps = c.prepareStatement(getstmt);
ps.setString(1, (String)key);
rs = ps.executeQuery();
if (!rs.next()) {
return(null);
}
C ret = cls.newInstance();
for (DBFieldHandler f: fields) {
f.fromSQL(rs, ret);
}
return(ret);
}
}).protect(cf, (String)key));
}
public Set<Map.Entry<String, C>> list() {
return((new ConnWrapper<Set<Map.Entry<String, C>>, Object>() {
protected Set<Map.Entry<String, C>> run(Object junk) throws Exception {
DBFieldHandler keyfield = fields[fields.length - 1];
ps = c.prepareStatement(liststmt);
rs = ps.executeQuery();
Set<Map.Entry<String, C>> ret = new HashSet<>();
while (rs.next()) {
C val = cls.newInstance();
for (DBFieldHandler f: fields) {
f.fromSQL(rs, val);
}
String key = keyfield.getKey(val);
ret.add(new AbstractMap.SimpleEntry<String, C>(key, val));
}
return(ret);
}
}).protect(cf, null));
}
public C put(String key, C val) {
try {
fields[fields.length - 1].setKey(val, key);
} catch (Exception e) {
throw new DBException(e);
}
return((new ConnWrapper<C, C>() {
protected C run(C val) throws Exception {
ps = c.prepareStatement(insorreplstmt);
for (DBFieldHandler f: fields) {
f.toSQL(val, ps);
}
ps.executeUpdate();
return(null);
}
}).protect(cf, val));
}
public C remove(Object key) {
if (!(key instanceof String)) {
return(null);
}
return((new ConnWrapper<C, String>() {
protected C run(String key) throws Exception {
ps = c.prepareStatement(delstmt);
ps.setString(1, key);
ps.executeUpdate();
return(null);
}
}).protect(cf, (String)key));
}
}
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