/**
* 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 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 org.apache.falcon.entity.common;
import java.util.regex.Pattern;
/**
* Helper to map feed path and the time component.
*/
public final class FeedDataPath {
private FeedDataPath() {}
/**
* Standard variables for feed time components.
*/
public static enum VARS {
YEAR("yyyy"), MONTH("MM"), DAY("dd"), HOUR("HH"), MINUTE("mm");
private final Pattern pattern;
private final String datePattern;
private VARS(String datePattern) {
pattern = Pattern.compile("\\$\\{" + name() + "\\}");
this.datePattern = datePattern;
}
public String regex() {
return pattern.pattern();
}
public static VARS from(String str) {
for (VARS var : VARS.values()) {
if (var.datePattern.equals(str)) {
return var;
}
}
return null;
}
public static VARS presentIn(String str) {
for (VARS var : VARS.values()) {
if (str.contains(var.datePattern)) {
return var;
}
}
return null;
}
}
public static final Pattern PATTERN = Pattern.compile(VARS.YEAR.regex()
+ "|" + VARS.MONTH.regex() + "|" + VARS.DAY.regex() + "|"
+ VARS.HOUR.regex() + "|" + VARS.MINUTE.regex());
public static final Pattern DATE_FIELD_PATTERN = Pattern
.compile("yyyy|MM|dd|HH|mm");
}