commons-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From bugzi...@apache.org
Subject DO NOT REPLY [Bug 20388] New: - [Collections]GenericFactory -> Factory implementation for general use of Factory with lazyList
Date Sun, 01 Jun 2003 00:16:26 GMT
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG 
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://nagoya.apache.org/bugzilla/show_bug.cgi?id=20388>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND 
INSERTED IN THE BUG DATABASE.

http://nagoya.apache.org/bugzilla/show_bug.cgi?id=20388

[Collections]GenericFactory -> Factory implementation for general use of Factory with lazyList

           Summary: [Collections]GenericFactory -> Factory implementation
                    for general use of Factory with lazyList
           Product: Commons
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Other
         Component: Collections
        AssignedTo: commons-dev@jakarta.apache.org
        ReportedBy: mail@phase.ws


The following is a class that I wrote that implements the Factory interface of 
the Collections package. It is a good generic class when using the lazyList. It 
cuts down on the amount of code you have to write. I submitted this a long 
while back and for some reason it did not go through. It really should. If 
there is a class that already accomplishes this, then please let me know. But, 
I haven't been able to find it. Also, if the Factory Interface exists within 
the Collections package then why not have an implementation. Anyways, the class 
is called GenericFactory and it's easy to use. Here is the syntax.

List myList;

this.myList = 
  ListUtils.lazyList(
    new ArrayList(),
    new GenericFactory("com.foo.myClass"));

Simple Huh?

Here is the class code.

--- code start ---

package org.apache.commons.collections;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author Brandon Goodin
 *
 */

public class GenericFactory implements Factory
{
	
  private static final Log log = LogFactory.getLog(GenericFactory.class);
	
  private String className;
  private Object object;
    
  public GenericFactory(String className)
  {
    this.className = className;
  }

  public Object create()
  {
    try {
      object = null;
      Class classDefinition = Class.forName(className);
      object = classDefinition.newInstance();
    }
    catch(InstantiationException ex){
      log.error(ex.getMessage(),ex.fillInStackTrace());
    }
    catch(IllegalAccessException ex) {
      log.error(ex.getMessage(),ex.fillInStackTrace());
    } catch(ClassNotFoundException ex) {
      log.error(ex.getMessage(),ex.fillInStackTrace());
    }
    return object;
  }
}

--- code stop ---

---------------------------------------------------------------------
To unsubscribe, e-mail: commons-dev-unsubscribe@jakarta.apache.org
For additional commands, e-mail: commons-dev-help@jakarta.apache.org


Mime
View raw message