public final class OptionConverter
extends java.lang.Object
Modifier and Type | Field and Description |
---|---|
private static java.lang.String |
DELIM_START |
private static int |
DELIM_START_LEN |
private static char |
DELIM_STOP |
private static int |
DELIM_STOP_LEN |
private static Logger |
LOGGER |
private static int |
ONE_K |
Modifier | Constructor and Description |
---|---|
private |
OptionConverter()
OptionConverter is a static class.
|
Modifier and Type | Method and Description |
---|---|
static java.lang.String[] |
concatenateArrays(java.lang.String[] l,
java.lang.String[] r) |
static java.lang.String |
convertSpecialChars(java.lang.String s) |
static java.lang.String |
findAndSubst(java.lang.String key,
java.util.Properties props)
Find the value corresponding to
key in
props . |
static java.lang.Object |
instantiateByClassName(java.lang.String className,
java.lang.Class<?> superClass,
java.lang.Object defaultValue)
Instantiate an object given a class name.
|
static java.lang.Object |
instantiateByKey(java.util.Properties props,
java.lang.String key,
java.lang.Class<?> superClass,
java.lang.Object defaultValue) |
static java.lang.String |
substVars(java.lang.String val,
java.util.Properties props)
Perform variable substitution in string
val from the
values of keys found in the system propeties. |
static boolean |
toBoolean(java.lang.String value,
boolean defaultValue)
If
value is "true", then true is
returned. |
static long |
toFileSize(java.lang.String value,
long defaultValue) |
static int |
toInt(java.lang.String value,
int defaultValue)
Convert the String value to an int.
|
private static final Logger LOGGER
private static final java.lang.String DELIM_START
private static final char DELIM_STOP
private static final int DELIM_START_LEN
private static final int DELIM_STOP_LEN
private static final int ONE_K
public static java.lang.String[] concatenateArrays(java.lang.String[] l, java.lang.String[] r)
public static java.lang.String convertSpecialChars(java.lang.String s)
public static java.lang.Object instantiateByKey(java.util.Properties props, java.lang.String key, java.lang.Class<?> superClass, java.lang.Object defaultValue)
public static boolean toBoolean(java.lang.String value, boolean defaultValue)
value
is "true", then true
is
returned. If value
is "false", then
false
is returned. Otherwise, default
is
returned.
Case of value is unimportant.
value
- The value to convert.defaultValue
- The default value.public static int toInt(java.lang.String value, int defaultValue)
value
- The value as a String.defaultValue
- The default value.public static long toFileSize(java.lang.String value, long defaultValue)
value
- The size of the file as a String.defaultValue
- The default value.public static java.lang.String findAndSubst(java.lang.String key, java.util.Properties props)
key
in
props
. Then perform variable substitution on the
found value.key
- The key to locate.props
- The properties.public static java.lang.Object instantiateByClassName(java.lang.String className, java.lang.Class<?> superClass, java.lang.Object defaultValue)
className
is a subclass of
superClass
. If that test fails or the object could
not be instantiated, then defaultValue
is returned.className
- The fully qualified class name of the object to instantiate.superClass
- The class to which the new object should belong.defaultValue
- The object to return in case of non-fulfillmentpublic static java.lang.String substVars(java.lang.String val, java.util.Properties props) throws java.lang.IllegalArgumentException
val
from the
values of keys found in the system propeties.
The variable substitution delimiters are ${ and }.
For example, if the System properties contains "key=value", then the call
String s = OptionConverter.substituteVars("Value of key is ${key}.");
will set the variable s
to "Value of key is value.".
If no value could be found for the specified key, then the
props
parameter is searched, if the value could not
be found there, then substitution defaults to the empty string.
For example, if system properties contains no value for the key "inexistentKey", then the call
String s = OptionConverter.subsVars("Value of inexistentKey is [${inexistentKey}]");
will set s
to "Value of inexistentKey is []"
An IllegalArgumentException
is thrown if
val
contains a start delimeter "${" which is not
balanced by a stop delimeter "}".
val
- The string on which variable substitution is performed.props
- The properties to use for substitution.java.lang.IllegalArgumentException
- if val
is malformed.