com.facebook.presto.jdbc.internal.joda.time.convert.ReadablePartialConverter Maven / Gradle / Ivy
/*
* Copyright 2001-2009 Stephen Colebourne
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.jdbc.internal.joda.time.convert;
import com.facebook.presto.jdbc.internal.joda.time.Chronology;
import com.facebook.presto.jdbc.internal.joda.time.DateTimeUtils;
import com.facebook.presto.jdbc.internal.joda.time.DateTimeZone;
import com.facebook.presto.jdbc.internal.joda.time.ReadablePartial;
/**
* ReadablePartialConverter extracts partial fields and chronology from a ReadablePartial.
*
* @author Stephen Colebourne
* @since 1.0
*/
class ReadablePartialConverter extends AbstractConverter
implements PartialConverter {
/**
* Singleton instance.
*/
static final ReadablePartialConverter INSTANCE = new ReadablePartialConverter();
/**
* Restricted constructor.
*/
protected ReadablePartialConverter() {
super();
}
//-----------------------------------------------------------------------
/**
* Gets the chronology, which is taken from the ReadablePartial.
*
* @param object the ReadablePartial to convert, must not be null
* @param zone the specified zone to use, null means default zone
* @return the chronology, never null
*/
public Chronology getChronology(Object object, DateTimeZone zone) {
return getChronology(object, (Chronology) null).withZone(zone);
}
/**
* Gets the chronology, which is taken from the ReadableInstant.
*
* If the passed in chronology is non-null, it is used.
* Otherwise the chronology from the instant is used.
*
* @param object the ReadablePartial to convert, must not be null
* @param chrono the chronology to use, null means use that from object
* @return the chronology, never null
*/
public Chronology getChronology(Object object, Chronology chrono) {
if (chrono == null) {
chrono = ((ReadablePartial) object).getChronology();
chrono = DateTimeUtils.getChronology(chrono);
}
return chrono;
}
/**
* Extracts the values of the partial from an object of this converter's type.
* The chrono parameter is a hint to the converter, should it require a
* chronology to aid in conversion.
*
* @param fieldSource a partial that provides access to the fields.
* This partial may be incomplete and only getFieldType(int) should be used
* @param object the object to convert
* @param chrono the chronology to use, which is the non-null result of getChronology()
* @return the array of field values that match the fieldSource, must be non-null valid
* @throws ClassCastException if the object is invalid
*/
public int[] getPartialValues(ReadablePartial fieldSource, Object object, Chronology chrono) {
ReadablePartial input = (ReadablePartial) object;
int size = fieldSource.size();
int[] values = new int[size];
for (int i = 0; i < size; i++) {
values[i] = input.get(fieldSource.getFieldType(i));
}
chrono.validate(fieldSource, values);
return values;
}
//-----------------------------------------------------------------------
/**
* Returns ReadableInstant.class.
*
* @return ReadableInstant.class
*/
public Class getSupportedType() {
return ReadablePartial.class;
}
}