State.java

/*******************************************************************************
 * Copyright (c) 2015 IBM Corp.
 *
 * Licensed 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 com.ibm.ws.repository.common.enums;

import java.util.Arrays;
import java.util.List;

public enum State {
    DRAFT("draft", new StateAction[] {
                                      null, // Draft
                                      StateAction.PUBLISH, // Awaiting approval
                                      StateAction.PUBLISH, // Need more info
                                      StateAction.PUBLISH // Publish
    }),
    AWAITING_APPROVAL("awaiting_approval", new StateAction[] {
                                                              StateAction.CANCEL, // Draft
                                                              null, // Awaiting approval 
                                                              StateAction.NEED_MORE_INFO, // Need more info 
                                                              StateAction.APPROVE // Publish
    }),
    NEED_MORE_INFO("need_more_info", new StateAction[] {
                                                        StateAction.PUBLISH, // Draft
                                                        StateAction.PUBLISH, // Awaiting approval 
                                                        null, // Need more info 
                                                        StateAction.PUBLISH // Publish
    }),
    PUBLISHED("published", new StateAction[] {
                                              StateAction.UNPUBLISH, // Draft
                                              StateAction.UNPUBLISH, // Awaiting approval 
                                              StateAction.UNPUBLISH, // Need more info 
                                              null // Publish
    });

    private final String state;
    private StateAction[] actions;

    private State(String state, StateAction[] actions) {
        this.state = state;
        this.actions = actions;
    }

    public boolean isStateActionAllowed(StateAction action) {
        List<StateAction> allowed = Arrays.asList(actions);
        return action == null ? false : allowed.contains(action);
    }

    public StateAction getNextAction(State target) {
        return actions[target.ordinal()];
    }

    public String getValue() {
        return state;
    }

    public static State forValue(String value) {
        for (State state : State.values()) {
            if (state.getValue().equals(value)) {
                return state;
            }
        }
        return null;
    }

}