org.apache.nifi.processor.DataUnit Maven / Gradle / Ivy
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/*
* 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.nifi.processor;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public enum DataUnit {
/**
* Bytes
*/
B {
@Override
public double toB(double value) {
return value;
}
@Override
public double toKB(double value) {
return value / POWERS[1];
}
@Override
public double toMB(double value) {
return value / POWERS[2];
}
@Override
public double toGB(double value) {
return value / POWERS[3];
}
@Override
public double toTB(double value) {
return value / POWERS[4];
}
@Override
public double convert(double sourceSize, DataUnit sourceUnit) {
return sourceUnit.toB(sourceSize);
}
},
/**
* Kilobytes
*/
KB {
@Override
public double toB(double value) {
return value * POWERS[1];
}
@Override
public double toKB(double value) {
return value;
}
@Override
public double toMB(double value) {
return value / POWERS[1];
}
@Override
public double toGB(double value) {
return value / POWERS[2];
}
@Override
public double toTB(double value) {
return value / POWERS[3];
}
@Override
public double convert(double sourceSize, DataUnit sourceUnit) {
return sourceUnit.toKB(sourceSize);
}
},
/**
* Megabytes
*/
MB {
@Override
public double toB(double value) {
return value * POWERS[2];
}
@Override
public double toKB(double value) {
return value * POWERS[1];
}
@Override
public double toMB(double value) {
return value;
}
@Override
public double toGB(double value) {
return value / POWERS[1];
}
@Override
public double toTB(double value) {
return value / POWERS[2];
}
@Override
public double convert(double sourceSize, DataUnit sourceUnit) {
return sourceUnit.toMB(sourceSize);
}
},
/**
* Gigabytes
*/
GB {
@Override
public double toB(double value) {
return value * POWERS[3];
}
@Override
public double toKB(double value) {
return value * POWERS[2];
}
@Override
public double toMB(double value) {
return value * POWERS[1];
}
@Override
public double toGB(double value) {
return value;
}
@Override
public double toTB(double value) {
return value / POWERS[1];
}
@Override
public double convert(double sourceSize, DataUnit sourceUnit) {
return sourceUnit.toGB(sourceSize);
}
},
/**
* Terabytes
*/
TB {
@Override
public double toB(double value) {
return value * POWERS[4];
}
@Override
public double toKB(double value) {
return value * POWERS[3];
}
@Override
public double toMB(double value) {
return value * POWERS[2];
}
@Override
public double toGB(double value) {
return value * POWERS[1];
}
@Override
public double toTB(double value) {
return value;
}
@Override
public double convert(double sourceSize, DataUnit sourceUnit) {
return sourceUnit.toTB(sourceSize);
}
};
public double convert(final double sourceSize, final DataUnit sourceUnit) {
throw new AbstractMethodError();
}
public double toB(double size) {
throw new AbstractMethodError();
}
public double toKB(double size) {
throw new AbstractMethodError();
}
public double toMB(double size) {
throw new AbstractMethodError();
}
public double toGB(double size) {
throw new AbstractMethodError();
}
public double toTB(double size) {
throw new AbstractMethodError();
}
public static final double[] POWERS = {1,
1024D,
1024 * 1024D,
1024 * 1024 * 1024D,
1024 * 1024 * 1024 * 1024D};
public static final String DATA_SIZE_REGEX = "(\\d+(?:\\.\\d+)?)\\s*(B|KB|MB|GB|TB)";
public static final Pattern DATA_SIZE_PATTERN = Pattern.compile(DATA_SIZE_REGEX);
public static Double parseDataSize(final String value, final DataUnit units) {
if (value == null) {
return null;
}
final Matcher matcher = DATA_SIZE_PATTERN.matcher(value.toUpperCase());
if (!matcher.find()) {
throw new IllegalArgumentException("Invalid data size: " + value);
}
final String sizeValue = matcher.group(1);
final String unitValue = matcher.group(2);
final DataUnit sourceUnit = DataUnit.valueOf(unitValue);
final double size = Double.parseDouble(sizeValue);
return units.convert(size, sourceUnit);
}
}