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/*
* Oreka -- A media capture and retrieval platform
*
* Copyright (C) 2005, orecx LLC
*
* http://www.orecx.com
*
* This program is free software, distributed under the terms of
* the GNU General Public License.
* Please refer to http://www.gnu.org/copyleft/gpl.html
*
*/
package net.sf.oreka.serializers;
import net.sf.oreka.*;
/**
*
* Base class for all serializers.
* Serializers have to implement their own serialize and deserialize methods
* since the data can be read from and written to many different formats
*
* Enum and Boolean value are case insensitive (all enum values must be defined
* lower case in the project, otherwise they won't be recognized at all)
*
*/
public abstract class OrkSerializer {
boolean deserialize = false;
String classKey = "class";
public void setClassKey(String classKey)
{
this.classKey = classKey;
}
public int intValue(String key, int value, boolean required) throws OrkException
{
if (deserialize)
{
return getInt(key, value, required);
}
else
{
addInt(key, value);
return value;
}
}
public double doubleValue(String key, double value, boolean required) throws OrkException
{
if (deserialize)
{
return getDouble(key, value, required);
}
else
{
addDouble(key, value);
return value;
}
}
public String stringValue(String key, String value, boolean required ) throws OrkException
{
if (deserialize)
{
return getString(key, value, required);
}
else
{
addString(key, value);
return value;
}
}
public boolean booleanValue(String key, boolean value, boolean required ) throws OrkException
{
if (deserialize)
{
return getBoolean(key, value, required);
}
else
{
addBoolean(key, value);
return value;
}
}
public Enum enumValue(String key, Enum value, boolean required ) throws OrkException
{
if (deserialize)
{
return getEnum(key, value, required);
}
else
{
addEnum(key, value);
return value;
}
}
public abstract OrkObject objectValue(String key, OrkObject value, boolean required ) throws OrkException;
public abstract void addClassName(String value);
void addInt(String key, int value)
{
String valueString = String.valueOf(value);
addString(key, valueString);
}
void addDouble(String key, double value)
{
String valueString = String.valueOf(value);
addString(key, valueString);
}
void addBoolean(String key, boolean value)
{
if(value)
{
addString(key, "true");
}
else
{
addString(key, "false");
}
}
void addEnum(String key, Enum value)
{
addString(key, value.name());
}
abstract void addString(String key, String value);
int getInt(String key, int oldValue, boolean required) throws OrkException
{
int value = 0;
String stringValue = getString(key, null, required);
if (stringValue == null)
{
value = oldValue;
}
else
{
try
{
value = Integer.valueOf(stringValue);
}
catch (Exception e)
{
throw (new OrkException("Serializer: value:" + stringValue + " not an int for key:" + key));
}
}
return value;
}
double getDouble(String key, double oldValue, boolean required) throws OrkException
{
double value = 0.0;
String stringValue = getString(key, null, required);
if (stringValue == null)
{
value = oldValue;
}
else
{
try
{
value = Double.valueOf(stringValue);
}
catch (Exception e)
{
throw (new OrkException("Serializer: value:" + stringValue + " not a double for key:" + key));
}
}
return value;
}
boolean getBoolean(String key, boolean oldValue, boolean required) throws OrkException
{
boolean value;
String stringValue = getString(key, null, required);
if (stringValue == null)
{
value = oldValue;
}
else
{
stringValue = stringValue.toLowerCase();
if( stringValue.equals("true") || stringValue.equals("yes") || stringValue.equals("1") )
{
value = true;
}
else if( stringValue.equals("false") || stringValue.equals("no") || stringValue.equals("0") )
{
value = false;
}
else
{
throw(new OrkException("Serializer: Invalid boolean value:" + stringValue + " for key:" + key));
}
}
return value;
}
Enum getEnum(String key, Enum oldValue, boolean required) throws OrkException
{
Enum value = null;
String stringValue = getString(key, null, required);
if (stringValue == null)
{
value = oldValue;
}
else
{
stringValue = stringValue.toLowerCase();
Class valueClass = oldValue.getClass();
try
{
value = Enum.valueOf(valueClass, stringValue);
}
catch (IllegalArgumentException e)
{
throw (new OrkException("Serializer: Invalid enum value:" + stringValue + " for parameter:" + key));
}
}
return value;
}
abstract String getString(String key, String oldValue, boolean required ) throws OrkException;
}
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