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/**
* Copyright (c) 2014, University of Warsaw
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR
* CONTRIBUTORS 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 pl.edu.mimuw.cloudatlas.model;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import pl.edu.mimuw.cloudatlas.model.Value;
import pl.edu.mimuw.cloudatlas.model.ValueTime;
/**
* A class representing a POSIX time in milliseconds. This is a simple wrapper of a Java <code>Long</code> object.
*/
public class ValueTime extends ValueSimple<Long> {
/**
* A format string for constructing from or converting to a <code>String</code> object.
*/
public static final DateFormat TIME_FORMAT = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss.SSS");
/**
* Constructs a new <code>ValueTime</code> object wrapping the specified value.
*
* @param value the POSIX time
*/
public ValueTime(Long value) {
super(value);
}
/* Kryo needs a no-args constructor */
private ValueTime() {
}
@Override
public Type getType() {
return TypePrimitive.TIME;
}
@Override
public Value getDefaultValue() {
return new ValueTime(0l);
}
/**
* Constructs a new <code>ValueTime</code> object from its textual representation.
*
* @param time a time formatted according to {@link #TIME_FORMAT}
* @throws ParseException if the <code>time</code> is incorrect
* @see #TIME_FORMAT
*/
public ValueTime(String time) throws ParseException {
this(TIME_FORMAT.parse(time).getTime());
}
@Override
public ValueBoolean isLowerThan(Value value) {
sameTypesOrThrow(value, Operation.COMPARE);
if(isNull() || value.isNull())
return new ValueBoolean(null);
return new ValueBoolean(getValue() < ((ValueTime)value).getValue());
}
@Override
public ValueTime addValue(Value value) {
if(!value.getType().isCompatible(TypePrimitive.DURATION))
throw new IncompatibleTypesException(getType(), value.getType(), Operation.ADD);
if(isNull() || value.isNull())
return new ValueTime((Long)null);
return new ValueTime(getValue() + ((ValueDuration)value).getValue());
}
@Override
public Value subtract(Value value) {
if(value.getType().isCompatible(TypePrimitive.DURATION)) {
if(isNull() || value.isNull())
return new ValueTime((Long)null);
return new ValueTime(getValue() - ((ValueDuration)value).getValue());
} else if(value.getType().isCompatible(TypePrimitive.TIME)) {
if(isNull() || value.isNull())
return new ValueTime((Long)null);
return new ValueDuration(getValue() - ((ValueTime)value).getValue());
}
throw new IncompatibleTypesException(getType(), value.getType(), Operation.SUBTRACT);
}
@Override
public Value convertTo(Type type) {
switch(type.getPrimaryType()) {
case STRING:
return getValue() == null? ValueString.NULL_STRING : new ValueString(TIME_FORMAT.format(getValue()));
case TIME:
return this;
default:
throw new UnsupportedConversionException(getType(), type);
}
}
}
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