org.apache.ode.daohib.bpel.ql.StateComparator.java Source code

Introduction

Here is the source code for org.apache.ode.daohib.bpel.ql.StateComparator.java

Source

/*
 * 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.ode.daohib.bpel.ql;

import java.util.Comparator;

import org.apache.commons.lang.ArrayUtils;

import org.apache.ode.bpel.common.ProcessState;
import org.apache.ode.daohib.bpel.hobj.HProcessInstance;

class StateComparator implements Comparator<HProcessInstance> {

    private static final short[] order = {
            //"active" status
            ProcessState.STATE_ACTIVE, ProcessState.STATE_NEW, ProcessState.STATE_READY,
            //"completed"
            ProcessState.STATE_COMPLETED_OK,
            //"error"
            //TODO Create status for error
            200, //noState
            //"failed"
            ProcessState.STATE_COMPLETED_WITH_FAULT,
            //"suspended"
            ProcessState.STATE_SUSPENDED,
            //"terminated"
            ProcessState.STATE_TERMINATED };

    private final int multiplier;

    public final static StateComparator ASC = new StateComparator(true);
    public final static StateComparator DESC = new StateComparator(false);

    protected StateComparator(boolean asc) {
        multiplier = asc ? 1 : -1;
    }

    /**
     * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
     */
    public int compare(HProcessInstance o1, HProcessInstance o2) {
        return multiplier * (ArrayUtils.indexOf(order, o1.getState()) - ArrayUtils.indexOf(order, o2.getState()));
    }

}