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JDBC Driver for the Firebird RDBMS
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/*
* Public Firebird Java API.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.firebirdsql.gds.impl;
import java.io.Serializable;
import java.util.HashMap;
/**
* Type-safe "enumeration" of the GDS types registered in the system.
*/
public final class GDSType implements Serializable {
private final static HashMap typeMap = new HashMap();
// Getter for the typeMap variable, please note that static initializer of
// the GDSFactory class will access the registerType(String) method
private static HashMap getTypeMap() {
return typeMap;
}
// DO NOT REMOVE: needed to initiate static initialization of the GDSFactory
@SuppressWarnings("unused")
private static final GDSFactory factory = new GDSFactory();
/**
* Factory method for instances of this class. There's only three possible
* instances of this class, however linking to them directly is not always
* possible and desirable (for example when type is specified in configuration).
* This method gives the possibility to translate string representation of
* the type into correct type instance.
*
* @param type string representation of the type to match (matching is case
* insensitive). Possible values are:
*
* "PURE_JAVA"
or "TYPE4"
for pure Java (type 4)
* driver version;
* "NATIVE"
or "TYPE2"
for type 2 JDBC driver
* that will use Firebird client library to access the database using JNI
* link.
* "EMBEDDED"
for type 2 JDBC driver that will use embedded
* version of the server to perform database-related operations.
*
*
* @return instance of {@link GDSType} corresponding to the specified
* string representation or null
if no match could be found.
*/
public static GDSType getType(String type) {
if (type == null)
return null;
return (GDSType)getTypeMap().get(type.toUpperCase());
}
/**
* Register the GDS type. Method can be called only by
* {@link GDSFactory#registerPlugin(GDSFactoryPlugin)} method.
*
* @param typeName name of the GDS type.
*
* @return instance of {@link GDSType} corresponding to the specified type
* name.
*/
static GDSType registerType(String typeName) {
HashMap typeMap = getTypeMap();
synchronized(typeMap) {
if (typeMap.containsKey(typeName))
return (GDSType)typeMap.get(typeName);
GDSType type = new GDSType(typeName);
typeMap.put(typeName, type);
return type;
}
}
private GDSType(String s) {
name = s;
}
public Object readResolve() {
return registerType(name);
}
public String toString() {
return name;
}
private final String name;
}