/*

  * Copyright 2011 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl1.php

  *

  * 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.kuali.rice.kew.api.action;

 import java.io.Serializable;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.HashSet;

 import java.util.Set;

 import javax.xml.bind.annotation.XmlAccessType;

 import javax.xml.bind.annotation.XmlAccessorType;

 import javax.xml.bind.annotation.XmlAnyElement;

 import javax.xml.bind.annotation.XmlElement;

 import javax.xml.bind.annotation.XmlRootElement;

 import javax.xml.bind.annotation.XmlType;

 import org.kuali.rice.core.api.CoreConstants;

 import org.kuali.rice.core.api.mo.AbstractDataTransferObject;

 import org.kuali.rice.core.api.mo.ModelBuilder;

 import org.w3c.dom.Element;

 @XmlRootElement(name = ValidActions.Constants.ROOT_ELEMENT_NAME)

 @XmlAccessorType(XmlAccessType.NONE)

 @XmlType(name = ValidActions.Constants.TYPE_NAME, propOrder = {

     ValidActions.Elements.VALID_ACTION_CODES,

     CoreConstants.CommonElements.FUTURE_ELEMENTS

 })

 public final class ValidActions extends AbstractDataTransferObject {

         private static final long serialVersionUID = 8074175291030982905L;

         @XmlElement(name = Elements.VALID_ACTION_CODE, required = false)

     private final Set<String> validActionCodes;

     @SuppressWarnings("unused")

     @XmlAnyElement

     private final Collection<Element> _futureElements = null;

     /**

      * Private constructor used only by JAXB.

      */

     private ValidActions() {

         this.validActionCodes = null;

     }

     private ValidActions(Builder builder) {

         Set<ActionType> validActions = builder.getValidActions();

         Set<String> validActionCodes = new HashSet<String>();

         for (ActionType actionType : validActions) {

                 validActionCodes.add(actionType.getCode());

         }

         this.validActionCodes = validActionCodes;

     }

     public Set<ActionType> getValidActions() {

             if (validActionCodes == null) {

                     return Collections.emptySet();

             }

             Set<ActionType> validActions = new HashSet<ActionType>();

             for (String validActionCode : validActionCodes) {

                     // ignore action codes that we don't understand because they could be coming from a later version of KEW

                     ActionType actionType = ActionType.fromCode(validActionCode, true);

                     if (actionType != null) {

                             validActions.add(actionType);

                     }

             }

         return Collections.unmodifiableSet(validActions);

     }

     /**

      * A builder which can be used to construct {@link ValidActions} instances.

      */

     public final static class Builder implements Serializable, ModelBuilder {

                 private static final long serialVersionUID = -3227993220281961077L;

                 private Set<ActionType> validActions;

         private Builder() {

                 setValidActions(new HashSet<ActionType>());

         }

         public static Builder create() {

             return new Builder();

         }

         public ValidActions build() {

             return new ValidActions(this);

         }

         public Set<ActionType> getValidActions() {

             return this.validActions;

         }

         public void setValidActions(Set<ActionType> validActions) {

                 if (validActions == null) {

                         throw new IllegalArgumentException("validActions was null");

                 }

             this.validActions = new HashSet<ActionType>(validActions);

         }

         public void addValidAction(ActionType validAction) {

                 if (validAction == null) {

                         throw new IllegalArgumentException("validAction was null");

                 }

                 validActions.add(validAction);

         }

     }

     /**

      * Defines some internal constants used on this class.

      */

     static class Constants {

         final static String ROOT_ELEMENT_NAME = "validActions";

         final static String TYPE_NAME = "ValidActionsType";

     }

     /**

      * A private class which exposes constants which define the XML element names to use when this object is marshalled to XML.

      */

     static class Elements {

         final static String VALID_ACTION_CODES = "validActionCodes";

         final static String VALID_ACTION_CODE = "validActionCode";

     }

 }