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cloudstack/utils/src/com/cloud/utils/NumbersUtil.java at 4.2 · kwanggithub/cloudstack · GitHub
This repository was archived by the owner on Jan 15, 2020. It is now read-only.
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cloud
/
utils
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NumbersUtil.java
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/
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utils
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NumbersUtil.java
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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
// 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
.
cloud
.
utils
;
import
java
.
nio
.
ByteBuffer
;
import
java
.
text
.
ParseException
;
import
java
.
text
.
SimpleDateFormat
;
import
java
.
util
.
Date
;
import
java
.
util
.
Formatter
;
import
com
.
cloud
.
utils
.
exception
.
CloudRuntimeException
;
public
class
NumbersUtil
{
public
static
long
parseLong
(
String
s
,
long
defaultValue
) {
if
(
s
==
null
) {
return
defaultValue
;
}
try
{
return
Long
.
parseLong
(
s
);
}
catch
(
NumberFormatException
e
) {
return
defaultValue
;
}
}
public
static
int
parseInt
(
String
s
,
int
defaultValue
) {
if
(
s
==
null
) {
return
defaultValue
;
}
try
{
return
Integer
.
parseInt
(
s
);
}
catch
(
NumberFormatException
e
) {
return
defaultValue
;
}
}
public
static
float
parseFloat
(
String
s
,
float
defaultValue
) {
if
(
s
==
null
) {
return
defaultValue
;
}
try
{
return
Float
.
parseFloat
(
s
);
}
catch
(
NumberFormatException
e
) {
return
defaultValue
;
}
}
/**
* Converts bytes to short on input.
*/
public
static
int
bytesToShort
(
byte
b
[]) {
return
(
b
[
1
] &
0xff
) | ((
b
[
0
] <<
8
) &
0xff00
);
}
public
static
int
bytesToShort
(
byte
b
[],
int
pos
) {
return
(
b
[
pos
+
1
] &
0xff
) | ((
b
[
pos
] <<
8
) &
0xff00
);
}
/**
* Converts bytes to long on input.
*/
public
static
int
bytesToInt
(
byte
b
[]) {
return
bytesToInt
(
b
,
0
);
}
public
static
int
bytesToInt
(
byte
b
[],
int
pos
) {
int
value
=
b
[
pos
+
3
] &
0xff
;
value
|= (
b
[
pos
+
2
] <<
8
) &
0xff00
;
value
|= (
b
[
pos
+
1
] <<
16
) &
0xff0000
;
value
|= (
b
[
pos
] <<
24
) &
0xff000000
;
return
value
;
}
/**
* Converts a short to a series of bytes for output. Must be 2 bytes long.
*/
public
static
byte
[]
shortToBytes
(
int
n
) {
byte
b
[] =
new
byte
[
2
];
b
[
1
] = (
byte
) (
n
&
0xff
);
b
[
0
] = (
byte
) ((
n
>>
8
) &
0xff
);
return
b
;
}
public
static
char
encodeByte
(
int
b
) {
if
(
b
<
10
) {
return
(
char
) (
b
+
'0'
);
}
else
if
(
b
<
36
) {
return
(
char
) (
b
-
10
+
'A'
);
}
else
if
(
b
<
62
) {
return
(
char
) (
b
-
36
+
'a'
);
}
else
if
(
b
==
62
) {
return
'('
;
}
else
if
(
b
==
63
) {
return
')'
;
}
return
(
char
)
255
;
}
public
static
int
decodeByte
(
char
b
) {
if
(
b
>=
'A'
&&
b
<=
'Z'
) {
return
b
+
10
-
'A'
;
}
else
if
(
b
>=
'a'
&&
b
<=
'z'
) {
return
b
+
36
-
'a'
;
}
else
if
(
b
>=
'0'
&&
b
<=
'9'
) {
return
b
-
'0'
;
}
else
if
(
b
==
')'
) {
return
63
;
}
else
if
(
b
==
'('
) {
return
62
;
}
return
-
1
;
}
/**
* Converts a long to a series of bytes for output. Must be 4 bytes long.
*/
public
static
byte
[]
intToBytes
(
int
n
) {
byte
b
[] =
new
byte
[
4
];
b
[
3
] = (
byte
) (
n
&
0xff
);
b
[
2
] = (
byte
) ((
n
>>
8
) &
0xff
);
b
[
1
] = (
byte
) ((
n
>>
16
) &
0xff
);
b
[
0
] = (
byte
) ((
n
>>
24
) &
0xff
);
return
b
;
}
/**
* Sorry for the bad naming but the longToBytes is already taken. Returns an 8 byte long byte array.
**/
public
static
byte
[]
longToBytes
(
long
n
) {
byte
b
[] =
new
byte
[
8
];
b
[
7
] = (
byte
) (
n
&
0xff
);
b
[
6
] = (
byte
) ((
n
>>
8
) &
0xff
);
b
[
5
] = (
byte
) ((
n
>>
16
) &
0xff
);
b
[
4
] = (
byte
) ((
n
>>
24
) &
0xff
);
b
[
3
] = (
byte
) ((
n
>>
32
) &
0xff
);
b
[
2
] = (
byte
) ((
n
>>
40
) &
0xff
);
b
[
1
] = (
byte
) ((
n
>>
48
) &
0xff
);
b
[
0
] = (
byte
) ((
n
>>
56
) &
0xff
);
return
b
;
}
/**
* Converts bytes to long on input.
*/
public
static
long
bytesToLong
(
byte
b
[]) {
return
bytesToLong
(
b
,
0
);
}
public
static
long
bytesToLong
(
byte
b
[],
int
pos
) {
ByteBuffer
buf
=
ByteBuffer
.
wrap
(
b
,
pos
,
8
);
return
buf
.
getLong
();
/*
* long value = b[pos + 7] & 0xff;
* value |= (b[pos + 6] << 8) & 0xff00;
* value |= (b[pos + 5] << 16) & 0xff0000;
* value |= (b[pos + 4] << 24) & 0xff000000;
* value |= (b[pos + 3] << 32) & 0xff00000000;
* value |= (b[pos + 2] << 40) & 0xff0000000000;
* value |= (b[pos + 1] << 48) & 0xff000000000000;
* value |= (b[pos + 0] << 56) & 0xff00000000000000;
* return value;
*/
}
/**
* Converts a byte array to a hex readable string.
**/
public
static
String
bytesToString
(
byte
[]
data
,
int
start
,
int
end
) {
StringBuilder
buf
=
new
StringBuilder
();
if
(
end
>
data
.
length
) {
end
=
data
.
length
;
}
for
(
int
i
=
start
;
i
<
end
;
i
++) {
buf
.
append
(
" "
);
buf
.
append
(
Integer
.
toHexString
(
data
[
i
] &
0xff
));
}
return
buf
.
toString
();
}
protected
static
final
long
KB
=
1024
;
protected
static
final
long
MB
=
1024
*
KB
;
protected
static
final
long
GB
=
1024
*
MB
;
protected
static
final
long
TB
=
1024
*
GB
;
public
static
String
toReadableSize
(
long
bytes
) {
if
(
bytes
<=
KB
&&
bytes
>=
0
) {
return
Long
.
toString
(
bytes
) +
" bytes"
;
}
else
if
(
bytes
<=
MB
) {
StringBuilder
builder
=
new
StringBuilder
();
Formatter
format
=
new
Formatter
(
builder
);
format
.
format
(
"%.2f KB"
, (
float
)
bytes
/ (
float
)
KB
);
return
builder
.
toString
();
}
else
if
(
bytes
<=
GB
) {
StringBuilder
builder
=
new
StringBuilder
();
Formatter
format
=
new
Formatter
(
builder
);
format
.
format
(
"%.2f MB"
, (
float
)
bytes
/ (
float
)
MB
);
return
builder
.
toString
();
}
else
if
(
bytes
<=
TB
) {
StringBuilder
builder
=
new
StringBuilder
();
Formatter
format
=
new
Formatter
(
builder
);
format
.
format
(
"%.2f GB"
, (
float
)
bytes
/ (
float
)
GB
);
return
builder
.
toString
();
}
else
{
StringBuilder
builder
=
new
StringBuilder
();
Formatter
format
=
new
Formatter
(
builder
);
format
.
format
(
"%.4f TB"
, (
float
)
bytes
/ (
float
)
TB
);
return
builder
.
toString
();
}
}
/**
* Converts a string of the format 'yy-MM-dd'T'HH:mm:ss.SSS" into ms.
*
* @param str containing the interval.
* @param defaultValue value to return if str doesn't parse. If -1, throws VmopsRuntimeException
* @return interval in ms
*/
public
static
long
parseInterval
(
String
str
,
long
defaultValue
) {
SimpleDateFormat
sdf
=
null
;
if
(
str
.
contains
(
"D"
)) {
sdf
=
new
SimpleDateFormat
(
"dd'D'HH'h'mm'M'ss'S'SSS'ms'"
);
}
else
if
(
str
.
contains
(
"h"
)) {
sdf
=
new
SimpleDateFormat
(
"HH'h'mm'M'ss'S'SSS'ms'"
);
}
else
if
(
str
.
contains
(
"M"
)) {
sdf
=
new
SimpleDateFormat
(
"mm'M'ss'S'SSS'ms'"
);
}
else
if
(
str
.
contains
(
"S"
)) {
sdf
=
new
SimpleDateFormat
(
"ss'S'SSS'ms'"
);
}
else
if
(
str
.
contains
(
"ms"
)) {
sdf
=
new
SimpleDateFormat
(
"SSS'ms'"
);
}
Date
date
;
try
{
if
(
str
==
null
||
sdf
==
null
) {
throw
new
ParseException
(
"String is wrong"
,
0
);
}
date
=
sdf
.
parse
(
str
);
return
date
.
getTime
();
}
catch
(
ParseException
e
) {
if
(
defaultValue
!= -
1
) {
return
defaultValue
;
}
else
{
throw
new
CloudRuntimeException
(
"Unable to parse: "
+
str
,
e
);
}
}
}
public
static
int
hash
(
long
value
) {
return
(
int
)(
value
^(
value
>>>
32
));
}
public
static
void
main
(
String
[]
args
) {
long
interval
=
parseInterval
(
args
[
0
], -
1
);
System
.
out
.
println
(
args
[
0
] +
" is "
+
interval
);
}
}
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