java.lang.Object
- adams.core.logging.LoggingObject
- - adams.core.Placeholders

All Implemented Interfaces:

LoggingSupporter, SizeOfHandler, Serializable
```
public class Placeholders
extends LoggingObject
```
A class for accessing the system-wide defined placeholders.

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`ADAMS_PLACEHOLDERS`	the environment variable to obtain placeholders from (semi-colon separated placeholder=path pairs).
`static String`	`CWD`	the placeholder for the current working directory.
`static String`	`FILENAME`	the filename.
`static String`	`HOME`	the placeholder for the home directory.
`protected Set<String>`	`m_NoCollapse`	the placeholders that are not to be collapsed.
`protected Map<String,String>`	`m_Placeholders`	the placeholders.
`protected Properties`	`m_Properties`	the properties.
`protected static Placeholders`	`m_Singleton`	the singleton.
`static String`	`NO_COLLAPSE`	the list of placeholders only to expand, but not collapse.
`static String`	`PLACEHOLDER_END`	the ending string of a placeholder.
`static String`	`PLACEHOLDER_START`	the starting string of a placeholder.
`static String`	`PROJECT`	the placeholder for the project directory.
`static String`	`SEPARATOR`	the separator for key-value pairs.
`static String`	`TMP`	the placeholder for the tmp directory.

Fields inherited from class adams.core.logging.LoggingObject
m_Logger, m_LoggingIsEnabled, m_LoggingLevel

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`collapse(String s)`	Matches all placeholders against the string.
`static String`	`collapseStr(String s)`	Adds placeholders to the given string.
`protected String`	`doExpand(String s)`	Expands all placeholders in the given string.
`String`	`expand(String s)`	Expands all placeholders in the given string.
`static String`	`expandStr(String s)`	Expands the placeholders in the given string.
`String`	`get(String key)`	Returns the placeholder for the given (uppercase!)
`static Placeholders`	`getSingleton()`	Returns the singleton instance of the Placeholders.
`boolean`	`has(String key)`	Checks whether the placeholder exists.
`protected void`	`initialize()`	loads the props file and interpretes it.
`boolean`	`isValid(String s)`	Checks whether all placeholders in the given string can be expanded.
`static boolean`	`isValidStr(String s)`	Checks whether all placeholders can be expanded.
`static void`	`main(String[] args)`	For outputting placeholders.
`Set<String>`	`noCollapse()`	Returns the placeholders that are excluded from collapsing.
`Set<String>`	`placeholders()`	Returns all stored placeholder keys (local + global).
`String`	`remove(String key)`	Removes the placeholder value under the specified key.
`String`	`set(String key, String value)`	Sets the placeholder value under the specified key.
`Properties`	`toProperties()`	Turns the global placeholders into a properties object.
`String`	`toString()`	Returns the underlying properties storing the placeholders as simple string.

Methods inherited from class adams.core.logging.LoggingObject
configureLogger, getLogger, getLoggingLevel, initializeLogging, isLoggingEnabled, sizeOf

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - FILENAME
```
public static final String FILENAME
```
    the filename.
    
    See Also:
    
    Constant Field Values
  - CWD
```
public static final String CWD
```
    the placeholder for the current working directory.
    
    See Also:
    
    Constant Field Values
  - PROJECT
```
public static final String PROJECT
```
    the placeholder for the project directory.
    
    See Also:
    
    Constant Field Values
  - TMP
```
public static final String TMP
```
    the placeholder for the tmp directory.
    
    See Also:
    
    Constant Field Values
  - HOME
```
public static final String HOME
```
    the placeholder for the home directory.
    
    See Also:
    
    Constant Field Values
  - PLACEHOLDER_START
```
public static final String PLACEHOLDER_START
```
    the starting string of a placeholder.
    
    See Also:
    
    Constant Field Values
  - PLACEHOLDER_END
```
public static final String PLACEHOLDER_END
```
    the ending string of a placeholder.
    
    See Also:
    
    Constant Field Values
  - SEPARATOR
```
public static final String SEPARATOR
```
    the separator for key-value pairs.
    
    See Also:
    
    Constant Field Values
  - NO_COLLAPSE
```
public static final String NO_COLLAPSE
```
    the list of placeholders only to expand, but not collapse.
    
    See Also:
    
    Constant Field Values
  - ADAMS_PLACEHOLDERS
```
public static final String ADAMS_PLACEHOLDERS
```
    the environment variable to obtain placeholders from (semi-colon separated placeholder=path pairs).
    
    See Also:
    
    Constant Field Values
  - m_Singleton
```
protected static Placeholders m_Singleton
```
    the singleton.
  - m_Properties
```
protected Properties m_Properties
```
    the properties.
  - m_Placeholders
```
protected Map<String,String> m_Placeholders
```
    the placeholders.
  - m_NoCollapse
```
protected Set<String> m_NoCollapse
```
    the placeholders that are not to be collapsed.
- Method Detail
  - initialize
```
protected void initialize()
```
    loads the props file and interpretes it.
  - placeholders
```
public Set<String> placeholders()
```
    Returns all stored placeholder keys (local + global).
    
    Returns:
    
    the placeholder keys (local + global)
  - noCollapse
```
public Set<String> noCollapse()
```
    Returns the placeholders that are excluded from collapsing.
    
    Returns:
    
    the placeholder keys
  - has
```
public boolean has(String key)
```
    Checks whether the placeholder exists.
    
    Parameters:
    
    key - the (uppercase) name of the placeholder to check
    
    Returns:
    
    true if available
  - get
```
public String get(String key)
```
    Returns the placeholder for the given (uppercase!) key. Trailing path element separators ("/" or "\") are always stripped.
    
    Parameters:
    
    key - the (uppercase) name of the placeholder to retrieve
    
    Returns:
    
    the value, null if not found
  - set
```
public String set(String key,
                  String value)
```
    Sets the placeholder value under the specified key.
    
    Parameters:
    
    key - the placeholder key (uppercase!)
    
    value - the value of the placeholder
    
    Returns:
    
    any previously stored value for the placeholder, null if none previously stored
  - remove
```
public String remove(String key)
```
    Removes the placeholder value under the specified key.
    
    Parameters:
    
    key - the placeholder key (uppercase!) to remove
    
    Returns:
    
    any previously stored value for the placeholder, null if none previously stored
  - isValid
```
public boolean isValid(String s)
```
    Checks whether all placeholders in the given string can be expanded.
    
    Parameters:
    
    s - the string to check
    
    Returns:
    
    true if all placeholders could be expanded
  - expand
```
public String expand(String s)
```
    Expands all placeholders in the given string.
    
    Parameters:
    
    s - the string to expand
    
    Returns:
    
    the string with the placeholders replaced
  - doExpand
```
protected String doExpand(String s)
```
    Expands all placeholders in the given string.
    
    Parameters:
    
    s - the string to expand
    
    Returns:
    
    the string with the placeholders replaced
  - collapse
```
public String collapse(String s)
```
    Matches all placeholders against the string. The one that shortens the string most, will be used.
    
    Parameters:
    
    s - the string to process
    
    Returns:
    
    the processed string
  - toString
```
public String toString()
```
    Returns the underlying properties storing the placeholders as simple string.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    the properties as (simple) string
  - toProperties
```
public Properties toProperties()
```
    Turns the global placeholders into a properties object.
    
    Returns:
    
    the generated properties
  - getSingleton
```
public static Placeholders getSingleton()
```
    Returns the singleton instance of the Placeholders.
    
    Returns:
    
    the singleton
  - isValidStr
```
public static boolean isValidStr(String s)
```
    Checks whether all placeholders can be expanded.
    
    Parameters:
    
    s - the string to process
    
    Returns:
    
    true if all placeholders could be expanded
  - expandStr
```
public static String expandStr(String s)
```
    Expands the placeholders in the given string.
    
    Parameters:
    
    s - the string to process
    
    Returns:
    
    the processed string
  - collapseStr
```
public static String collapseStr(String s)
```
    Adds placeholders to the given string.
    
    Parameters:
    
    s - the string to process
    
    Returns:
    
    the processed string
  - main
```
public static void main(String[] args)
```
    For outputting placeholders.
    
    Parameters:
    
    args - the commandline arguments: [-env ]

Class Placeholders

Field Summary

Fields inherited from class adams.core.logging.LoggingObject

Method Summary

Methods inherited from class adams.core.logging.LoggingObject

Methods inherited from class java.lang.Object

Field Detail

FILENAME

CWD

PROJECT

TMP

HOME

PLACEHOLDER_START

PLACEHOLDER_END

SEPARATOR

NO_COLLAPSE

ADAMS_PLACEHOLDERS

m_Singleton

m_Properties

m_Placeholders

m_NoCollapse

Method Detail

initialize

placeholders

noCollapse

has

get

set

remove

isValid

expand

doExpand

collapse

toString

toProperties

getSingleton

isValidStr

expandStr

collapseStr

main