/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


package stats;

import java.io.PrintWriter;
import java.io.StringWriter;

/**
 * Write all logs into a java.io.PrintWriter, i.e. a StringBuffer.
 * Log is gathered there.
 */
public class InternalLogWriter extends PrintWriter
                                            implements share.LogWriter {
    /** log active **/
    boolean active;
    /** write all output to a StringBuffer **/
    static StringWriter writer = new StringWriter();

    /**
     * c'*tor
     */
    public InternalLogWriter() {
         super(new PrintWriter(writer));
         active = true;
    }

    /**
     * Initialization.
     * @param entry The description entry.
     * @param active Logging is active.
     * @return True, if initialize worked.
     */
    public boolean initialize(share.DescEntry entry, boolean active) {
        this.active = active;
        return true;
    }

    /**
     * Method to print a line that is added to the StringBuffer.
     * @param msg The message that is printed.
     */
    public void println(String msg) {
        if (active)
            super.println(msg);
    }

    /**
     * Method to print to the StringBuffer.
     * @param msg The message that is printed.
     */
    public void print(String msg) {
        if (active)
            super.print(msg);

    }

    /**
     * Is used to sum up the information.
     * The summary is also added to the StringBuffer.
     * @param entry The description entry.
     * @return True, if a summary could be created.
     */
    public boolean summary(share.DescEntry entry) {
//        linePrefix = "";
        String header = "***** State for "+entry.longName+" ******";
        println(header);
        if (entry.hasErrorMsg) {
            println(entry.ErrorMsg);
            println("Whole "+entry.EntryType+": "+entry.State);
        } else {
            println("Whole "+entry.EntryType+": "+entry.State);
        }
        for (int i=0;i<header.length();i++) {
            print("*");
        }
        println("");
        return true;
    }

    /**
     * Return all the written stuff.
     * @return All that was written to the StringBuffer with the
     * 'println()', 'print()' and 'summarize()' methods.
     * The StringBuffer is emptied afterwards.
     **/
    public String getLog() {
        String message = writer.getBuffer().toString();
        writer = new StringWriter();
        return message;
    }
    
    public Object getWatcher() {
        return null;
    }
    
    public void setWatcher(Object watcher) {
    }
    
}