PluginMessageLogger.java

/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright 2009 Pentaho Corporation.  All rights reserved.
 *
 * Created Jan 6, 2009
 * @author aphillips
 */

package org.pentaho.platform.plugin.services.pluginmgr;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.Predicate;

public class PluginMessageLogger {
  private static ThreadLocal<List<String>> messages = new ThreadLocal<List<String>>() {
    protected List<String> initialValue() {
      return new ArrayList<String>();
    }
  };

  public static void clear() {
    messages.get().clear();
  }

  public static void add(String message) {
    messages.get().add(message);
  }

  public static List<String> getAll() {
    return messages.get();
  }

  public static int count(final String messagePrefix) {
    return CollectionUtils.countMatches(messages.get(), new Predicate() {

      public boolean evaluate(Object object) {
        return ((String) object).startsWith(messagePrefix);
      }

    });
  }
  
  public static String prettyPrint() {
    StringBuilder builder = new StringBuilder();
    for(String msg : messages.get()) {
      builder.append(msg);
      builder.append('\n');
    }
    return builder.toString();
  }

}