org.simplity.kernel.value.TimestampValue Maven / Gradle / Ivy
The newest version!
/*
* Copyright (c) 2016 simplity.org
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.simplity.kernel.value;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.Date;
import org.simplity.kernel.Tracer;
import org.simplity.kernel.util.DateUtil;
/**
* Very special value, and should not be used except for specific timestap field
* defined in an rdbms. Simplity uses time-stamp field to take care of
* concurrency issues. This class is designed to facilitate that
*
* @author simplity.org
*
*/
public class TimestampValue extends Value {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* this is the number of nano-seconds from epoch. this is
* 1000*Date.getTime()
*/
private long value;
protected TimestampValue(long value) {
this.value = value;
}
protected TimestampValue(Timestamp value) {
this.value = value.getTime() * 1000 + value.getNanos();
}
protected TimestampValue() {
this.valueIsNull = true;
}
@Override
public ValueType getValueType() {
return ValueType.TIMESTAMP;
}
@Override
protected void format() {
this.textValue = "" + this.value;
}
/*
* (non-Javadoc)
*
* @see org.simplity.kernel.value.Value#toInteger()
*/
@Override
public long toInteger() throws InvalidValueException {
return this.value;
}
/*
* (non-Javadoc)
*
* @see org.simplity.kernel.value.Value#toDecimal()
*/
@Override
public double toDecimal() throws InvalidValueException {
return this.value;
}
@Override
public Date toDate() throws InvalidValueException {
/*
* we return new date instead of caching because Date, unfortunately, is
* mutable
*/
return new Date(this.value / 1000);
}
@Override
protected boolean equalValue(Value otherValue) {
if (otherValue instanceof TimestampValue) {
return ((TimestampValue) otherValue).value == this.value;
}
return false;
}
/**
* method to be used on a concrete class to avoid exception handling
*
* @return date
*/
public long getDate() {
return this.value / 1000;
}
/**
* method to be used on a concrete class to avoid exception handling
*
* @return date
*/
public long getInteger() {
return this.value;
}
@Override
public void setToStatement(PreparedStatement statement, int idx)
throws SQLException {
if (this.valueIsNull) {
statement.setNull(idx, Types.TIMESTAMP);
} else {
Timestamp dateValue = new Timestamp(this.value);
Tracer.trace("Set set a timestamp of " + DateUtil.format(dateValue));
statement.setTimestamp(idx, dateValue);
}
}
@Override
public Object getObject() {
return new Long(this.value);
}
@Override
public Object[] toArray(Value[] values) {
int n = values.length;
Long[] arr = new Long[n];
for (int i = 0; i < n; i++) {
TimestampValue val = (TimestampValue) values[i];
arr[i] = new Long(val.value);
}
return arr;
}
}