org.zkoss.lang
Class Library

java.lang.Object
  org.zkoss.lang.Library

public class Library
extends java.lang.Object

Represent the scope of ZK libraries. Unlike System, the scope of Library depends how ZK libraries are installed. If they are installed in WEB-INF/lib of a ZK application, the scope is the application. In other words, the library properties (setProperty(java.lang.String, java.lang.String)) are shared by the application only.

On the other hand, if ZK libraries are installed in a folder shared by all applications, the library properties are shared by all applications.

Since:

3.0.7

Author:

tomyeh

Method Summary

static int	getIntProperty(java.lang.String key, int defVal) Parses the property value to an integer.
static java.lang.String	getProperty(java.lang.String key) Returns the library property indicated by the specified key.
static java.lang.String	getProperty(java.lang.String key, java.lang.String def) Returns the library property indicated by the specified key.
static java.lang.String	setProperty(java.lang.String key, java.lang.String value) Sets the library property indicated by the specified key.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getProperty

public static java.lang.String getProperty(java.lang.String key)

Returns the library property indicated by the specified key. If no such library property, this method will call System.getProperty(java.lang.String) to look for a system property.

The library property is shared by Java codes that access the same set of ZK libraries, since it is actually a static member of this class. Thus, if ZK libraries (including this class) are installed in WEB-INF/lib of an application, the library properties are accessible only in the application.

Note: unlike System.getProperty(java.lang.String), this method won't throw SecurityException.

Returns:

the string value of the library property, or the system property, or null if no such property.

See Also:

setProperty(java.lang.String, java.lang.String)

getProperty

public static java.lang.String getProperty(java.lang.String key,
                                           java.lang.String def)

Returns the library property indicated by the specified key. If no such library property, this method will call System.getProperty(java.lang.String) to look for a system property.

Note: unlike System.getProperty(java.lang.String), this method won't throw SecurityException.

Parameters:

key - the name of the library property

def - a default value.

Throws:

java.lang.NullPointerException - if key is null

IllegalArumentException - if key is empty

setProperty

public static java.lang.String setProperty(java.lang.String key,
                                           java.lang.String value)

Sets the library property indicated by the specified key.

Returns:

the previous value of the library property, or null if it did not have one.

Throws:

java.lang.NullPointerException - if key is null

IllegalArumentException - if key is empty

See Also:

getProperty(java.lang.String)

getIntProperty

public static int getIntProperty(java.lang.String key,
                                 int defVal)

Parses the property value to an integer. If the specified value is not an integer, the default value is returned (and a warning is logged).

Parameters:

defVal - the default value

Since:

3.6.1