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/*-
* ============LICENSE_START=======================================================
* OpenECOMP - org.openecomp.dmaapbc
* ================================================================================
* 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.openecomp.dmaapbc.database;
import java.lang.reflect.*;
import java.sql.*;
import java.util.*;
import org.apache.log4j.Logger;
public class DBFieldHandler {
static final Logger logger = Logger.getLogger(DBFieldHandler.class);
public static interface SqlOp {
public Object get(ResultSet rs, int index) throws Exception;
public void set(PreparedStatement ps, int index, Object value) throws Exception;
}
private static class AofString implements SqlOp {
public Object get(ResultSet rs, int index) throws Exception {
String val = rs.getString(index);
if (val == null) {
return(null);
}
String[] ret = val.split(",");
for (int i = 0; i < ret.length; i++) {
ret[i] = funesc(ret[i]);
}
return(ret);
}
public void set(PreparedStatement ps, int index, Object x) throws Exception {
String[] val = (String[])x;
if (val == null) {
ps.setString(index, null);
return;
}
StringBuffer sb = new StringBuffer();
String sep = "";
for (String s: val) {
sb.append(sep).append(fesc(s));
sep = ",";
}
ps.setString(index, sb.toString());
}
}
private static class EnumSql implements SqlOp {
private Class enclass;
public EnumSql(Class enclass) {
this.enclass = enclass;
}
@SuppressWarnings("unchecked")
public Object get(ResultSet rs, int index) throws Exception {
String val = rs.getString(index);
if (val == null) {
return(null);
} else {
return(Enum.valueOf(enclass, val));
}
}
public void set(PreparedStatement ps, int index, Object value) throws Exception {
if (value == null) {
ps.setString(index, null);
} else {
ps.setString(index, value.toString());
}
}
}
private static class SqlDate implements SqlOp {
public Object get(ResultSet rs, int index) throws Exception {
return(rs.getTimestamp(index));
}
public void set(PreparedStatement ps, int index, Object val) throws Exception {
if (val instanceof java.util.Date && !(val instanceof java.sql.Timestamp)) {
val = new java.sql.Timestamp(((java.util.Date)val).getTime());
}
ps.setTimestamp(index, (java.sql.Timestamp)val);
}
}
private static class SqlType implements SqlOp {
private Method sqlget;
private Method sqlset;
private SqlType(String tag) throws Exception {
sqlget = ResultSet.class.getMethod("get" + tag, Integer.TYPE);
sqlset = PreparedStatement.class.getMethod("set" + tag, Integer.TYPE, sqlget.getReturnType());
sqltypes.put(sqlget.getReturnType().getName(), this);
}
public Object get(ResultSet rs, int index) throws Exception {
return(sqlget.invoke(rs, index));
}
public void set(PreparedStatement ps, int index, Object val) throws Exception {
try {
sqlset.invoke(ps, index, val);
} catch (Exception e) {
logger.error("Problem setting field " + index + " to " + val + " statement is " + ps);
throw e;
}
}
}
private static Map<String, SqlOp> sqltypes;
static {
sqltypes = new HashMap<String, SqlOp>();
sqltypes.put("[Ljava.lang.String;", new AofString());
sqltypes.put("java.util.Date", new SqlDate());
try {
new SqlType("Boolean");
new SqlType("Timestamp");
new SqlType("Double");
new SqlType("Float");
new SqlType("Int");
new SqlType("Long");
new SqlType("Short");
new SqlType("String");
} catch (Exception e) {
logger.error("Problem initializing sql access methods " + e, e);
}
}
private Method objget;
private Method objset;
private SqlOp sqlop;
private int fieldnum;
public void copy(Object from, Object to) throws Exception {
objset.invoke(to, objget.invoke(from));
}
public void setKey(Object o, String key) throws Exception {
objset.invoke(o, key);
}
public String getKey(Object o) throws Exception {
return((String)objget.invoke(o));
}
public void toSQL(Object o, PreparedStatement ps) throws Exception {
sqlop.set(ps, fieldnum, objget.invoke(o));
}
public void fromSQL(ResultSet r, Object o) throws Exception {
objset.invoke(o, sqlop.get(r, fieldnum));
}
public DBFieldHandler(Class<?> c, String fieldname, int fieldnum) throws Exception {
this(c, fieldname, fieldnum, null);
}
public DBFieldHandler(Class<?> c, String fieldname, int fieldnum, SqlOp op) throws Exception {
this.fieldnum = fieldnum;
StringBuffer sb = new StringBuffer();
for (String s: fieldname.split("_")) {
sb.append(s.substring(0, 1).toUpperCase()).append(s.substring(1));
}
String camelcase = sb.toString();
try {
objget = c.getMethod("is" + camelcase);
} catch (Exception e) {
objget = c.getMethod("get" + camelcase);
}
objset = c.getMethod("set" + camelcase, objget.getReturnType());
sqlop = op;
if (sqlop != null) {
return;
}
Class<?> x = objget.getReturnType();
if (x.isEnum()) {
sqlop = new EnumSql(x);
return;
}
sqlop = sqltypes.get(x.getName());
if (sqlop != null) {
return;
}
logger.error("No field handler for class " + c.getName() + " field " + fieldname + " index " + fieldnum + " type " + x.getName());
}
public static String fesc(String s) {
if (s == null) {
return(s);
}
return(s.replaceAll("@", "@a").replaceAll(";", "@s").replaceAll(",", "@c"));
}
public static String funesc(String s) {
if (s == null) {
return(s);
}
return(s.replaceAll("@c", ",").replaceAll("@s", ";").replaceAll("@a", "@"));
}
}
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