/**
    * Copyright 2005-2012 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/ecl2.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.krms.api.repository.action;
  
  import org.apache.commons.lang.StringUtils;
  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.kuali.rice.core.api.util.jaxb.MapStringStringAdapter;
  
  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 javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
  import java.io.Serializable;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Concrete model object implementation of KRMS Repository Action 
   * immutable. 
   * Instances of Action can be (un)marshalled to and from XML.
   *
   * @see org.kuali.rice.krms.framework.engine.Action
   * @see ActionDefinitionContract
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @XmlRootElement(name = ActionDefinition.Constants.ROOT_ELEMENT_NAME)
  @XmlAccessorType(XmlAccessType.NONE)
  @XmlType(name = ActionDefinition.Constants.TYPE_NAME, propOrder = {
  		ActionDefinition.Elements.ID,
  		ActionDefinition.Elements.NAME,
  		ActionDefinition.Elements.NAMESPACE,
  		ActionDefinition.Elements.DESC,
  		ActionDefinition.Elements.TYPE_ID,
  		ActionDefinition.Elements.RULE_ID,
  		ActionDefinition.Elements.SEQUENCE_NUMBER,
  		ActionDefinition.Elements.ATTRIBUTES,
          CoreConstants.CommonElements.VERSION_NUMBER,
  		CoreConstants.CommonElements.FUTURE_ELEMENTS
  })
  public final class ActionDefinition extends AbstractDataTransferObject implements ActionDefinitionContract {
  	private static final long serialVersionUID = 2783959459503209577L;
  
  	@XmlElement(name = Elements.ID, required=true)
  	private String id;
  	@XmlElement(name = Elements.NAME, required=true)
  	private String name;
  	@XmlElement(name = Elements.NAMESPACE, required=true)
  	private String namespace;
  	@XmlElement(name = Elements.DESC, required=true)
  	private String description;
  	@XmlElement(name = Elements.TYPE_ID, required=true)
  	private String typeId;
  	@XmlElement(name = Elements.RULE_ID, required=true)
  	private String ruleId;
  	@XmlElement(name = Elements.SEQUENCE_NUMBER, required=true)
  	private Integer sequenceNumber;
  	
  	@XmlElement(name = Elements.ATTRIBUTES, required = false)
  	@XmlJavaTypeAdapter(value = MapStringStringAdapter.class)
  	private final Map<String, String> attributes;
  	
      @XmlElement(name = CoreConstants.CommonElements.VERSION_NUMBER, required = false)
      private final Long versionNumber;
      	
  	@SuppressWarnings("unused")
      @XmlAnyElement
      private final Collection<org.w3c.dom.Element> _futureElements = null;
  	
  	
  	 /** 
       * This constructor should never be called.  
       * It is only present for use during JAXB unmarshalling. 
       */
      private ActionDefinition() {
      	this.id = null;
      	this.name = null;
      	this.namespace = null;
      	this.description = null;
     	this.typeId = null;
     	this.ruleId = null;
     	this.sequenceNumber = null;
     	this.attributes = null;
         this.versionNumber = null;
     }
     
     /**
 	 * Constructs a KRMS Repository Action object from the given builder.  
 	 * This constructor is private and should only ever be invoked from the builder.
 	 * 
 	 * @param builder the Builder from which to construct the Action
 	 */
     private ActionDefinition(Builder builder) {
         this.id = builder.getId();
         this.name = builder.getName();
         this.namespace = builder.getNamespace();
         this.description = builder.getDescription();
         this.typeId = builder.getTypeId();
         this.ruleId = builder.getRuleId();
         this.sequenceNumber = builder.getSequenceNumber();
         if (builder.attributes != null){
         	this.attributes = Collections.unmodifiableMap(builder.getAttributes());
         } else {
         	this.attributes = null;
         }
         this.versionNumber = builder.getVersionNumber();
     }
     
 	@Override
 	public String getId() {
 		return this.id;
 	}
 
 	@Override
 	public String getName() {
 		return this.name;
 	}
 
 	@Override
 	public String getNamespace() {
 		return this.namespace;
 	}
 
 	@Override
 	public String getDescription() {
 		return this.description;
 	}
 
 	@Override
 	public String getTypeId() {
 		return this.typeId;
 	}
 
 	@Override
 	public String getRuleId() {
 		return this.ruleId;
 	}
 
 	@Override
 	public Integer getSequenceNumber() {
 		return this.sequenceNumber;
 	}
 
     /**
      * Returns the internal representation of the set of attributes associated with the
      * Action.  The attributes are represented as name/value pairs.
      *
      * @return internal representation of the set of ActionAttribute objects.
      */
 	@Override
 	public Map<String, String> getAttributes() {
 		return this.attributes; 
 	}
 
     @Override
     public Long getVersionNumber() {
         return versionNumber;
     }
         
 	/**
      * This builder is used to construct instances of KRMS Repository Action.  It enforces the constraints of the {@link ActionDefinitionContract}.
      */
     public static class Builder implements ActionDefinitionContract, ModelBuilder, Serializable {
         private static final long serialVersionUID = -6773634512570180267L;
 
         private String id;
         private String name;
         private String namespace;
         private String description;
         private String typeId;
         private String ruleId;
         private Integer sequenceNumber;
         private Map<String, String> attributes;
         private Long versionNumber;
 
         /**
          * Private constructor for creating a builder with all of it's required attributes.
          *
          * @param actionId the actionId value to set, must no tbe null or blank
          * @param name the name value to set, must not be null or blank
          * @param namespace the namespace value to set, must not be null or blank
          * @param typeId the typeId value to set
          * @param ruleId the ruleId value to set, must not be null or blank
          * @param sequenceNumber the sequenceNumber value to set, must not be null or blank
          */
         private Builder(String actionId, String name, String namespace, String typeId, String ruleId, Integer sequenceNumber) {
             setId(actionId);
             setName(name);
             setNamespace(namespace);
             setTypeId(typeId);
             setRuleId(ruleId);
             setSequenceNumber(sequenceNumber);
             setAttributes(new HashMap<String, String>());
         }
 
         /**
          * Create a builder with the given parameters
          * 
          * @param actionId the actionId value to set, must no tbe null or blank
          * @param name the name value to set, must not be null or blank
          * @param namespace the namespace value to set, must not be null or blank
          * @param typeId the typeId value to set
          * @param ruleId the ruleId value to set, must not be null or blank
          * @param sequenceNumber the sequenceNumber value to set, must not be null or blank
          * @return an instance of the builder populated with given data
          */
         public static Builder create(String actionId, String name, String namespace, String typeId, String ruleId, Integer sequenceNumber){
         	return new Builder(actionId, name, namespace, typeId, ruleId, sequenceNumber);
         }
         /**
          * Creates a builder by populating it with data from the given {@link ActionDefinitionContract}.
          * 
          * @param contract the contract from which to populate this builder
          * @return an instance of the builder populated with data from the contract
          * @throws IllegalArgumentException if the contract is null
          */
         public static Builder create(ActionDefinitionContract contract) {
         	if (contract == null) {
                 throw new IllegalArgumentException("contract is null");
             }
             Builder builder =  new Builder(contract.getId(), contract.getName(),
             		contract.getNamespace(), contract.getTypeId(), contract.getRuleId(),
             		contract.getSequenceNumber());
             builder.setDescription(contract.getDescription());
         	if (contract.getAttributes() != null){
                 builder.setAttributes(new HashMap<String, String>(contract.getAttributes()));
         	}
             builder.setVersionNumber(contract.getVersionNumber());
             return builder;
         }
 
 		/**
 		 * Sets the value of the id on this builder to the given value.
 		 * 
          * @param actionId the actionId value to set, must no tbe null or blank
 		 * @throws IllegalArgumentException if the actionId is non-null and blank
 		 */
         public void setId(String actionId) {
             if (actionId != null && StringUtils.isBlank(actionId)) {
                 throw new IllegalArgumentException("action ID must be null or non-blank");
             }
 			this.id = actionId;
 		}
 
 
         /**
          * Sets the value of the name on this builder to the given value.
          *
          * @param name the name value to set, must not be null or blank
          * @throws IllegalArgumentException if the name is non-null and blank
          */
         public void setName(String name) {
             if (StringUtils.isBlank(name)) {
                 throw new IllegalArgumentException("name is blank");
             }
 			this.name = name;
 		}
 
         /**
          * Sets the value of the namespace on this builder to the given value.
          *
          * @param namespace the namespace value to set, must not be null or blank
          * @throws IllegalArgumentException if the namespace is non-null and blank
          */
         public void setNamespace(String namespace) {
             if (StringUtils.isBlank(namespace)) {
                 throw new IllegalArgumentException("namespace is blank");
             }
 			this.namespace = namespace;
 		}
 
         /**
          * Sets the value of the description on this builder to the given value.
          *
          * @param desc the description value to set
          */
 		public void setDescription(String desc) {
 			this.description = desc;
 		}
 
         /**
          * Sets the value of the typeId on this builder to the given value.
          *
          * @param typeId the typeId value to set, must not be null or blank.
          * @throws IllegalArgumentException if the typeId is null or blank
          */
 		public void setTypeId(String typeId) {
 			if (StringUtils.isBlank(typeId)) {
 	                throw new IllegalArgumentException("KRMS type id is blank");
 			}
 			this.typeId = typeId;
 		}
 
         /**
          * Sets the value of the ruleId on this builder to the given value.
          *
          * @param ruleId the ruleId value to set, must not be null or blank
          * @throws IllegalArgumentException if the ruleId is null or blank
          */
 		public void setRuleId(String ruleId) {
 			if (StringUtils.isBlank(ruleId)) {
 	                throw new IllegalArgumentException("rule id is blank");
 			}
 			this.ruleId = ruleId;
 		}
 
         /**
          * Sets the value of the sequenceNumber on this builder to the given value.
          *
          * @param sequenceNumber the sequenceNumber value to set, must not be null or blank
          * @throws IllegalArgumentException if the sequenceNumber is null or blank
          */
 		public void setSequenceNumber(Integer sequenceNumber) {
 			if (sequenceNumber == null) {
 	                throw new IllegalArgumentException("sequence number is null");
 			}
 			this.sequenceNumber = sequenceNumber;
 		}
 
         /**
          * Sets the value of the attributes on this builder to the given value.
          *
          * @param attributes the attributes value to set, can be null
          */
 		public void setAttributes(Map<String, String> attributes){
 			if (attributes == null){
 				this.attributes = Collections.emptyMap();
 			}
 			this.attributes = Collections.unmodifiableMap(attributes);
 		}
 
         /**
          * Sets the value of the versionNumber on this builder to the given value.
          *
          * @param versionNumber the versionNumber value to set
          */
         public void setVersionNumber(Long versionNumber){
             this.versionNumber = versionNumber;
         }
         
 		@Override
 		public String getId() {
 			return id;
 		}
 
 		@Override
 		public String getName() {
 			return name;
 		}
 
 		@Override
 		public String getNamespace() {
 			return namespace;
 		}
 
 		@Override
 		public String getDescription() {
 			return description;
 		}
 
 		@Override
 		public String getTypeId() {
 			return typeId;
 		}
 
 		@Override
 		public String getRuleId() {
 			return ruleId;
 		}
 
 		@Override
 		public Integer getSequenceNumber() {
 			return sequenceNumber;
 		}
 
 		@Override
 		public Map<String, String> getAttributes() {
 			return attributes;
 		}
 
         @Override
         public Long getVersionNumber() {
             return versionNumber;
         }
 
 		/**
 		 * Builds an instance of a Action based on the current state of the builder.
 		 * 
 		 * @return the fully-constructed Action
 		 */
         @Override
         public ActionDefinition build() {
             return new ActionDefinition(this);
         }
 		
     }
 	
 	/**
 	 * Defines some internal constants used on this class.
 	 */
 	static class Constants {
 		final static String ROOT_ELEMENT_NAME = "action";
 		final static String TYPE_NAME = "ActionType";
 	}
 	
 	/**
 	 * A private class which exposes constants which define the XML element names to use
 	 * when this object is marshalled to XML.
 	 */
 	public static class Elements {
 		final static String ID = "id";
 		final static String NAME = "name";
 		final static String NAMESPACE = "namespace";
 		final static String DESC = "description";
 		final static String TYPE_ID = "typeId";
 		final static String RULE_ID = "ruleId";
 		final static String SEQUENCE_NUMBER = "sequenceNumber";
 		final static String ATTRIBUTES = "attributes";
 	}
 
 }