package org.squirrelframework.foundation.fsm;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Date;
import org.apache.commons.lang3.StringUtils;
public class GeneralConverter<T> implements Converter<T> {
private Class<T> type;
public GeneralConverter(Class<T> type) {
this.type = type;
}
@Override
public String convertToString(T obj) {
if(Enum.class.isAssignableFrom(type)) {
return ((Enum<?>)obj).name();
} else if(Date.class.isAssignableFrom(type)) {
return Long.toString(((Date)obj).getTime());
}
return obj != null ? obj.toString() : StringUtils.EMPTY;
}
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public T convertFromString(String value) {
if(value==null) return null;
if (type.equals(boolean.class) || type.equals(Boolean.class)) {
if (value == null || value.isEmpty()) {
return null;
} else if (value.equalsIgnoreCase("true")) {
return type.cast(Boolean.TRUE);
}
return type.cast(Boolean.FALSE);
} else if (Number.class.isAssignableFrom(type)
|| int.class.isAssignableFrom(type)
|| long.class.isAssignableFrom(type)
|| double.class.isAssignableFrom(type)
|| float.class.isAssignableFrom(type)
|| byte.class.isAssignableFrom(type)
|| short.class.isAssignableFrom(type)) {
BigDecimal convertedValue = new BigDecimal(value);
if (Integer.class.equals(type) || int.class.equals(type)) {
return type.cast(convertedValue.intValue());
} else if (Long.class.equals(type) || long.class.equals(type)) {
return type.cast(convertedValue.longValue());
} else if (Double.class.equals(type) || double.class.equals(type)) {
return type.cast(convertedValue.doubleValue());
} else if (Float.class.equals(type) || float.class.equals(type)) {
return type.cast(convertedValue.floatValue());
} else if (BigInteger.class.equals(type)) {
return type.cast(convertedValue.toBigInteger());
} else if (BigDecimal.class.equals(type)) {
return type.cast(convertedValue);
} else if (Short.class.equals(type) || short.class.equals(type)) {
return type.cast(convertedValue.shortValue());
} else if (Byte.class.equals(type) || byte.class.equals(type)) {
return type.cast(convertedValue.byteValue());
}
} else if(Enum.class.isAssignableFrom(type)) {
return type.cast(Enum.valueOf((Class)type, value));
} else if(String.class.equals(type)) {
return type.cast(value);
} else if(Date.class.isAssignableFrom(type)) {
return type.cast(new Date(Long.parseLong(value)));
} else if(Character.class.equals(type) || char.class.equals(type)) {
return type.cast(value.charAt(0));
}
throw new IllegalStateException("Unable to coverter type: \'" +
type.getName() +"\' with value \'"+value.toString()+"\'.");
}
}