net.java.ao.db.DerbyDatabaseProvider Maven / Gradle / Ivy
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This is the core library for Active Objects. It is generic and can be embedded in any environment.
As such it is generic and won't contain all connection pooling, etc.
/*
* Copyright 2007 Daniel Spiewak
*
* 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.
*/
package net.java.ao.db;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import net.java.ao.DatabaseProvider;
import net.java.ao.DisposableDataSource;
import net.java.ao.Query;
import net.java.ao.schema.IndexNameConverter;
import net.java.ao.schema.NameConverters;
import net.java.ao.schema.ddl.DDLField;
import net.java.ao.schema.ddl.DDLIndex;
import net.java.ao.schema.ddl.DDLTable;
import net.java.ao.schema.ddl.SQLAction;
import net.java.ao.types.TypeManager;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Daniel Spiewak
*/
abstract class DerbyDatabaseProvider extends DatabaseProvider {
DerbyDatabaseProvider(DisposableDataSource dataSource) {
super(dataSource, null, TypeManager.derby());
}
@Override
public String renderMetadataQuery(final String tableName) {
return "SELECT * FROM (SELECT * FROM " + withSchema(tableName) + ") WHERE ROWNUM <= 1";
}
@Override
public void setQueryStatementProperties(Statement stmt, Query query) throws SQLException {
int limit = query.getLimit();
if (limit >= 0) {
stmt.setFetchSize(limit);
stmt.setMaxRows(limit);
}
}
@Override
public void setQueryResultSetProperties(ResultSet res, Query query) throws SQLException {
if (query.getOffset() > 0) {
res.absolute(query.getOffset());
}
}
@Override
public ResultSet getTables(Connection conn) throws SQLException {
return conn.getMetaData().getTables("APP", getSchema(), null, new String[]{"TABLE"});
}
@Override
public Object parseValue(int type, String value) {
if (value == null || value.equals("") || value.equals("NULL")) {
return null;
}
switch (type) {
case Types.TIMESTAMP:
case Types.DATE:
case Types.TIME:
case Types.VARCHAR:
Matcher matcher = Pattern.compile("'(.*)'.*").matcher(value);
if (matcher.find()) {
value = matcher.group(1);
}
break;
}
return super.parseValue(type, value);
}
@Override
protected void setPostConnectionProperties(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
stmt.executeUpdate("SET SCHEMA app");
}
}
@Override
protected String renderQueryLimit(Query query) {
return "";
}
@Override
protected String renderAutoIncrement() {
return "GENERATED BY DEFAULT AS IDENTITY";
}
@Override
public Object handleBlob(ResultSet res, Class type, String field) throws SQLException {
final Blob blob = res.getBlob(field);
if (type.equals(InputStream.class)) {
return new ByteArrayInputStream(blob.getBytes(1, (int) blob.length()));
} else if (type.equals(byte[].class)) {
return blob.getBytes(1, (int) blob.length());
} else {
return null;
}
}
@Override
protected Iterable renderAlterTableChangeColumn(NameConverters nameConverters, DDLTable table, DDLField oldField, DDLField field) {
logger.warn("Derby doesn't support CHANGE TABLE statements!");
logger.warn("Migration may not be entirely in sync as a result!");
return ImmutableList.of();
}
@Override
protected Iterable renderAlterTableDropColumn(NameConverters nameConverters, DDLTable table, DDLField field) {
System.err.println("WARNING: Derby doesn't support ALTER TABLE DROP COLUMN statements");
return ImmutableList.of();
}
@Override
protected SQLAction renderDropIndex(IndexNameConverter indexNameConverter, DDLIndex index) {
return SQLAction.of("DROP INDEX " + processID(index.getIndexName()));
}
@Override
protected Set getReservedWords() {
return RESERVED_WORDS;
}
@Override
public boolean isCaseSensitive() {
return false;
}
private static final Set RESERVED_WORDS = ImmutableSet.of(
"ADD", "ALL", "ALLOCATE", "ALTER", "AND", "ANY", "ARE", "AS",
"ASC", "ASSERTION", "AT", "AUTHORIZATION", "AVG", "BEGIN", "BETWEEN", "BIT",
"BOOLEAN", "BOTH", "BY", "CALL", "CASCADE", "CASCADED", "CASE", "CAST",
"CHAR", "CHARACTER", "CHECK", "CLOSE", "COLLATE", "COLLATION", "COLUMN",
"COMMIT", "CONNECT", "CONNECTION", "CONSTRAINT", "CONSTRAINTS", "CONTINUE",
"CONVERT", "CORRESPONDING", "COUNT", "CREATE", "CURRENT", "CURRENT_DATE",
"CURRENT_TIME", "CURRENT_TIMESTAMP", "CURRENT_USER", "CURSOR", "DEALLOCATE",
"DEC", "DECIMAL", "DECLARE", "DEFERRABLE", "DEFERRED", "DELETE", "DESC",
"DESCRIBE", "DIAGNOSTICS", "DISCONNECT", "DISTINCT", "DOUBLE", "DROP", "ELSE",
"END", "ENDEXEC", "ESCAPE", "EXCEPT", "EXCEPTION", "EXEC", "EXECUTE", "EXISTS",
"EXPLAIN", "EXTERNAL", "FALSE", "FETCH", "FIRST", "FLOAT", "FOR", "FOREIGN",
"FOUND", "FROM", "FULL", "FUNCTION", "GET", "GET_CURRENT_CONNECTION", "GLOBAL",
"GO", "GOTO", "GRANT", "GROUP", "HAVING", "HOUR", "IDENTITY", "IMMEDIATE",
"IN", "INDICATOR", "INITIALLY", "INNER", "INOUT", "INPUT", "INSENSITIVE",
"INSERT", "INT", "INTEGER", "INTERSECT", "INTO", "IS", "ISOLATION", "JOIN",
"KEY", "LAST", "LEFT", "LIKE", "LONGINT", "LOWER", "LTRIM", "MATCH", "MAX",
"MIN", "MINUTE", "NATIONAL", "NATURAL", "NCHAR", "NVARCHAR", "NEXT", "NO",
"NOT", "NULL", "NULLIF", "NUMERIC", "OF", "ON", "ONLY", "OPEN", "OPTION", "OR",
"ORDER", "OUT", "OUTER", "OUTPUT", "OVERLAPS", "PAD", "PARTIAL", "PREPARE",
"PRESERVE", "PRIMARY", "PRIOR", "PRIVILEGES", "PROCEDURE", "PUBLIC", "READ",
"REAL", "REFERENCES", "RELATIVE", "RESTRICT", "REVOKE", "RIGHT", "ROLLBACK",
"ROWS", "RTRIM", "SCHEMA", "SCROLL", "SECOND", "SELECT", "SESSION_USER", "SET",
"SMALLINT", "SOME", "SPACE", "SQL", "SQLCODE", "SQLERROR", "SQLSTATE", "SUBSTR",
"SUBSTRING", "SUM", "SYSTEM_USER", "TABLE", "TEMPORARY", "TIMEZONE_HOUR",
"TIMEZONE_MINUTE", "TO", "TRAILING", "TRANSACTION", "TRANSLATE", "TRANSLATION",
"TRUE", "UNION", "UNIQUE", "UNKNOWN", "UPDATE", "UPPER", "USER", "USING",
"VALUES", "VARCHAR", "VARYING", "VIEW", "WHENEVER", "WHERE", "WITH", "WORK",
"WRITE", "XML", "XMLEXISTS", "XMLPARSE", "XMLSERIALIZE", "YEAR");
}