classfactory.html

jxta的api库

<A NAME="ClassFactory()"><!-- --></A><H3>
ClassFactory</H3>
<PRE>
protected <B>ClassFactory</B>()</PRE>
<DL>
<DD>Constructor for ClassFactory. Instances of ClassFactory are created only
  by the singleton subclasses.
<P>
</DL>

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<B>Method Detail</B></FONT></TD>
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<A NAME="getAssocTable()"><!-- --></A><H3>
getAssocTable</H3>
<PRE>
protected abstract java.util.Map <B>getAssocTable</B>()</PRE>
<DL>
<DD>Used by ClassFactory methods to get the mapping of keys to constructors.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the hashtable containing the mappings.</DL>
</DD>
</DL>
<HR>

<A NAME="getClassForKey()"><!-- --></A><H3>
getClassForKey</H3>
<PRE>
protected abstract java.lang.Class <B>getClassForKey</B>()</PRE>
<DL>
<DD>Used by ClassFactory methods to ensure that all keys used with the
  mapping are of the correct type.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>Class object of the key type.</DL>
</DD>
</DL>
<HR>

<A NAME="getAvailableKeys()"><!-- --></A><H3>
getAvailableKeys</H3>
<PRE>
public java.util.Iterator <B>getAvailableKeys</B>()</PRE>
<DL>
<DD>Return all of the available keys for this factory. All elements will be
  of the same type as the result as <code>getClassForKey</code>.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>Iterator containing all of the available keys for this
   factory. All elements will be of the same type as the result as
   <code>getClassForKey</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="getEntrySet()"><!-- --></A><H3>
getEntrySet</H3>
<PRE>
public java.util.Set <B>getEntrySet</B>()</PRE>
<DL>
<DD>Returns an umodifiable Set containing all of the associations stored in
  this ClassFactory. Each entry is of type <code>Map.Entry</code>.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>Set Containing all of the available entries for this
  factory.</DL>
</DD>
</DL>
<HR>

<A NAME="getClassOfInstantiators()"><!-- --></A><H3>
getClassOfInstantiators</H3>
<PRE>
protected abstract java.lang.Class <B>getClassOfInstantiators</B>()</PRE>
<DL>
<DD>Used by ClassFactory methods to ensure that all of the instance classes
  which register with this factory have the correct base class
<P>
<DD><DL>

<DT><B>Returns:</B><DD>Class object of the "Factory" type.</DL>
</DD>
</DL>
<HR>

<A NAME="registerFromResources(java.lang.String, java.lang.String)"><!-- --></A><H3>
registerFromResources</H3>
<PRE>
protected boolean <B>registerFromResources</B>(java.lang.String&nbsp;resourceName,
                                        java.lang.String&nbsp;propertyName)
                                 throws java.util.MissingResourceException</PRE>
<DL>
<DD>Given a resource bundle identifier and a property name register instance
 classes. The property must be a string containing class names which must
 be found on the current class path. The class names are seperated by
 spaces.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>resourceName</CODE> - name of the resource bundle<DD><CODE>propertyName</CODE> - name of the property.
<DT><B>Returns:</B><DD>boolean true if at least one instance class could be registered 
            with this factory.
<DT><B>Throws:</B>
<DD><CODE>java.util.MissingResourceException</CODE> - if the resource bundle or
 property cannot be located.</DL>
</DD>
</DL>
<HR>

<A NAME="registerFromString(java.lang.String)"><!-- --></A><H3>
registerFromString</H3>
<PRE>
protected boolean <B>registerFromString</B>(java.lang.String&nbsp;classNamesString)</PRE>
<DL>
<DD>Register instance classes given a string containing class names which
  must be found on the current class path. The class names are seperated
  by spaces.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>classNamesString</CODE> - The class name list
<DT><B>Returns:</B><DD>boolean true if at least one of the instance classes could be
  registered otherwise false.</DL>
</DD>
</DL>
<HR>

<A NAME="registerAssoc(java.lang.String)"><!-- --></A><H3>
registerAssoc</H3>
<PRE>
protected boolean <B>registerAssoc</B>(java.lang.String&nbsp;className)
                         throws java.lang.Exception</PRE>
<DL>
<DD>Register a class with the factory from its class name. Since class name
  doesn't tell us much, we just load the class and hope that something
  happens as a result of the class loading. This class is often overridden
  in class factories to interogate the instance class before registering
  the instance class.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>className</CODE> - The class name which will be regiestered.
<DT><B>Returns:</B><DD>boolean true if the class was registered otherwise false.
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - when an error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="registerAssoc(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
registerAssoc</H3>
<PRE>
protected boolean <B>registerAssoc</B>(java.lang.Object&nbsp;key,
                                java.lang.Object&nbsp;instantiator)</PRE>
<DL>
<DD>Register a key and instance class with the factory.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - The key to register.<DD><CODE>instantiator</CODE> - The instantiator object which will be registered for this key.
<DT><B>Returns:</B><DD>boolean true if the key was successfully registered otherwise false.</DL>
</DD>
</DL>
<HR>

<A NAME="getInstantiator(java.lang.Object)"><!-- --></A><H3>
getInstantiator</H3>
<PRE>
protected java.lang.Object <B>getInstantiator</B>(java.lang.Object&nbsp;key)
                                    throws java.util.NoSuchElementException</PRE>
<DL>
<DD>Return the instantiator associated with the provided key.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - The identifier for the Instantiator class to be returned.
<DT><B>Returns:</B><DD>Instantiator Instantiator matching the provided key
<DT><B>Throws:</B>
<DD><CODE>java.util.NoSuchElementException</CODE> - if the key has not been registerd.</DL>
</DD>
</DL>
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