resolver/src/main/java/org/apache/james/jspf/executor/FutureSPFResult.java

/****************************************************************
 * 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 org.apache.james.jspf.executor;

import org.apache.james.jspf.core.SPFSession;


/**
 * A Blocking version of SPFResult which block until the SPFResult is fully set
 *
 */
public class FutureSPFResult extends SPFResult {
    
    private boolean isReady;
    
    public FutureSPFResult() {
        isReady = false;
    }
    
    /**
     * Set SPFResult using the given SPFsession
     * 
     * @param session 
     * 
     */
    public synchronized void setSPFResult(SPFSession session) {
        setSPFSession(session);
        isReady = true;
        notify();
    }

    /**
     * Waits until the SPFResult is set 
     *
     */
    private synchronized void checkReady() {
        while (!isReady) {
            try {
                wait();
            } catch (InterruptedException e) {
                //
            }
        }
    }

    /**
     * @see org.apache.james.jspf.executor.SPFResult#getExplanation()
     */
    public String getExplanation() {
        checkReady();
        return super.getExplanation();
    }

    /**
     * @see org.apache.james.jspf.executor.SPFResult#getHeader()
     */
    public String getHeader() {
        checkReady();
        return super.getHeader();
    }

    /**
     * @see org.apache.james.jspf.executor.SPFResult#getHeaderName()
     */
    public String getHeaderName() {
        checkReady();
        return super.getHeaderName();
    }

    /**
     * @see org.apache.james.jspf.executor.SPFResult#getHeaderText()
     */
    public String getHeaderText() {
        checkReady();
        return super.getHeaderText();
    }

    /**
     * @see org.apache.james.jspf.executor.SPFResult#getResult()
     */
    public String getResult() {
        checkReady();
        return super.getResult();
    }

    /**
     * Return true if the result was fully builded 
     * 
     * @return true or false
     */
    public synchronized boolean isReady() {
        return isReady;
    }
}