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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.android.sdklib.devices;
public class Storage {
private long mNoBytes;
public Storage(long amount, Unit unit){
mNoBytes = amount * unit.getNumberOfBytes();
}
public Storage(long amount){
this(amount, Unit.B);
}
/** Returns the amount of storage represented, in Bytes */
public long getSize() {
return getSizeAsUnit(Unit.B);
}
public Storage deepCopy() {
return new Storage(mNoBytes);
}
/**
* Return the amount of storage represented by the instance in the given unit
* @param unit The unit of the result.
* @return The size of the storage in the given unit.
*/
public long getSizeAsUnit(Unit unit) {
return mNoBytes / unit.getNumberOfBytes();
}
@Override
public boolean equals(Object o) {
if (o == this){
return true;
}
if (!(o instanceof Storage)) {
return false;
}
Storage s = (Storage) o;
if (s.getSize() == this.getSize()) {
return true;
} else {
return false;
}
}
@Override
public int hashCode() {
int result = 17;
return 31 * result + (int) (mNoBytes^(mNoBytes>>>32));
}
public enum Unit{
B("B", 1),
KiB("KiB", 1024),
MiB("MiB", 1024 * 1024),
GiB("GiB", 1024 * 1024 * 1024),
TiB("TiB", 1024l * 1024l * 1024l * 1024l);
private String mValue;
/** The number of bytes needed to have one of the given unit */
private long mNoBytes;
private Unit(String val, long noBytes) {
mValue = val;
mNoBytes = noBytes;
}
public static Unit getEnum(String val) {
for(Unit v : values()){
if(v.mValue.equals(val)) {
return v;
}
}
return null;
}
public long getNumberOfBytes() {
return mNoBytes;
}
@Override
public String toString() {
return mValue;
}
}
/**
* Finds the largest {@link Unit} which can display the storage value as a positive integer
* with no loss of accuracy.
* @return The most appropriate {@link Unit}.
*/
public Unit getApproriateUnits() {
Unit optimalUnit = Unit.B;
for(Unit unit : Unit.values()) {
if(mNoBytes % unit.getNumberOfBytes() == 0) {
optimalUnit = unit;
} else {
break;
}
}
return optimalUnit;
}
}
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