io.datakernel.util.MemSize Maven / Gradle / Ivy
/*
* Copyright (C) 2015 SoftIndex LLC.
*
* 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 io.datakernel.util;
import java.util.function.Function;
public final class MemSize {
public static final long KB = 1024;
public static final long MB = 1024 * KB;
public static final long GB = 1024 * MB;
public static final long TB = 1024 * GB;
private final long bytes;
private MemSize(long bytes) {
this.bytes = bytes;
}
public static MemSize of(long bytes) {
return new MemSize(bytes);
}
public static MemSize bytes(long bytes) {
return MemSize.of(bytes);
}
public static MemSize kilobytes(long kilobytes) {
return of(kilobytes * KB);
}
public static MemSize megabytes(long megabytes) {
return of(megabytes * MB);
}
public static MemSize gigabytes(long gigabytes) {
return of(gigabytes * GB);
}
public static MemSize terabytes(long terabytes) {
return of(terabytes * TB);
}
public long toLong() {
return bytes;
}
public int toInt() {
if (bytes > Integer.MAX_VALUE) throw new IllegalStateException("MemSize exceeds Integer.MAX_VALUE: " + bytes);
return (int) bytes;
}
public MemSize map(Function fn) {
return MemSize.of(fn.apply(bytes));
}
public static MemSize valueOf(String string) {
return StringFormatUtils.parseMemSize(string);
}
public String format() {
return StringFormatUtils.formatMemSize(this);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
MemSize memSize = (MemSize) o;
return bytes == memSize.bytes;
}
@Override
public String toString() {
return "" + toLong();
}
}