com.hazelcast.org.apache.calcite.util.DateTimeStringUtils Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.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.hazelcast.org.apache.calcite.util;
import java.util.TimeZone;
/**
* Utility methods to manipulate String representation of DateTime values.
*/
public class DateTimeStringUtils {
private DateTimeStringUtils() {}
static String pad(int length, long v) {
StringBuilder s = new StringBuilder(Long.toString(v));
while (s.length() < length) {
s.insert(0, "0");
}
return s.toString();
}
/** Appends hour:minute:second to a buffer; assumes they are valid. */
static StringBuilder hms(StringBuilder b, int h, int m, int s) {
int2(b, h);
b.append(':');
int2(b, m);
b.append(':');
int2(b, s);
return b;
}
/** Appends year-month-day and hour:minute:second to a buffer; assumes they
* are valid. */
static StringBuilder ymdhms(StringBuilder b, int year, int month, int day,
int h, int m, int s) {
ymd(b, year, month, day);
b.append(' ');
hms(b, h, m, s);
return b;
}
/** Appends year-month-day to a buffer; assumes they are valid. */
static StringBuilder ymd(StringBuilder b, int year, int month, int day) {
int4(b, year);
b.append('-');
int2(b, month);
b.append('-');
int2(b, day);
return b;
}
private static void int4(StringBuilder buf, int i) {
buf.append((char) ('0' + (i / 1000) % 10));
buf.append((char) ('0' + (i / 100) % 10));
buf.append((char) ('0' + (i / 10) % 10));
buf.append((char) ('0' + i % 10));
}
private static void int2(StringBuilder buf, int i) {
buf.append((char) ('0' + (i / 10) % 10));
buf.append((char) ('0' + i % 10));
}
static boolean isValidTimeZone(final String timeZone) {
if (timeZone.equals("GMT")) {
return true;
} else {
String id = TimeZone.getTimeZone(timeZone).getID();
if (!id.equals("GMT")) {
return true;
}
}
return false;
}
}