/*
* Created on Dec 31, 2004 at the Interface Ecology Lab.
*/
package ecologylab.serialization.types.scalar;
import java.io.IOException;
import java.lang.reflect.Field;
import ecologylab.serialization.FieldDescriptor;
import ecologylab.serialization.ScalarUnmarshallingContext;
import ecologylab.serialization.TranslationContext;
import ecologylab.serialization.annotations.simpl_inherit;
import ecologylab.serialization.formatenums.Format;
import ecologylab.serialization.types.CrossLanguageTypeConstants;
import ecologylab.serialization.types.ScalarType;
/**
* Type system entry for long, a built-in primitive.
*
* @author andruid
*/
@simpl_inherit
public class LongType extends ScalarType<Long> implements CrossLanguageTypeConstants
{
public static final long DEFAULT_VALUE = 0;
public static final String DEFAULT_VALUE_STRING = "0";
public LongType()
{
this(long.class);
}
public LongType(Class<Long> thatClass)
{
super(thatClass, DOTNET_LONG, OBJC_LONG, null);
}
/**
* Convert the parameter to long.
*/
public long getValue(String valueString)
{
return Long.parseLong(valueString);
}
/**
* Parse the String into the (primitive) type, and return a boxed instance.
*
* @param value
* String representation of the instance.
*/
@Override
public Long getInstance(String value, String[] formatStrings,
ScalarUnmarshallingContext scalarUnmarshallingContext)
{
return "null".equalsIgnoreCase(value) ? null : new Long(value);
}
/**
* This is a primitive type, so we set it specially.
*
* @see ecologylab.serialization.types.ScalarType#setField(Object, Field, String)
*/
@Override
public boolean setField(Object object, Field field, String value)
{
boolean result = false;
try
{
field.setLong(object, getValue(value));
result = true;
}
catch (Exception e)
{
setFieldError(field, value, e);
}
return result;
}
/**
* The string representation for a Field of this type
*/
@Override
public String toString(Field field, Object context)
{
String result = "COULDN'T CONVERT!";
try
{
result = Long.toString(field.getLong(context));
}
catch (Exception e)
{
e.printStackTrace();
}
return result;
}
/**
* The default value for this type, as a String. This value is the one that translateToXML(...)
* wont bother emitting.
*
* In this case, "0".
*/
@Override
public String defaultValueString()
{
return DEFAULT_VALUE_STRING;
}
@Override
public Long defaultValue()
{
return DEFAULT_VALUE;
}
/**
* True if the value in the Field object matches the default value for this type.
*
* @param field
* @return
*/
@Override
public boolean isDefaultValue(Field field, Object context) throws IllegalArgumentException,
IllegalAccessException
{
return (Long) field.get(context) == DEFAULT_VALUE;
}
/**
* Get the value from the Field, in the context. Append its value to the buffy.
*
* @param buffy
* @param field
* @param context
* @throws IllegalAccessException
* @throws IllegalArgumentException
*/
@Override
public void appendValue(StringBuilder buffy, FieldDescriptor f2xo, Object context)
throws IllegalArgumentException, IllegalAccessException
{
buffy.append(getValueToAppend(f2xo, context));
}
/**
* Get the value from the Field, in the context. Append its value to the buffy.
*
* @param buffy
* @param context
* @param field
* @throws IllegalAccessException
* @throws IllegalArgumentException
*/
@Override
public void appendValue(Appendable buffy, FieldDescriptor fieldDescriptor, Object context,
TranslationContext serializationContext, Format format) throws IllegalArgumentException,
IllegalAccessException, IOException
{
buffy.append(getValueToAppend(fieldDescriptor, context));
}
public static String getValueToAppend(FieldDescriptor fieldDescriptor, Object context)
throws IllegalArgumentException, IllegalAccessException
{
String result = getNullStringIfNull(fieldDescriptor, context);
if (result == null)
{
result = fieldDescriptor.getField().get(context).toString();
}
return result;
}
}