/**

  * Copyright 2005-2011 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/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.kew.engine.node;

 import java.io.Serializable;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 import javax.persistence.CascadeType;

 import javax.persistence.Column;

 import javax.persistence.Entity;

 import javax.persistence.FetchType;

 import javax.persistence.GeneratedValue;

 import javax.persistence.Id;

 import javax.persistence.JoinColumn;

 import javax.persistence.JoinTable;

 import javax.persistence.ManyToMany;

 import javax.persistence.ManyToOne;

 import javax.persistence.NamedQueries;

 import javax.persistence.NamedQuery;

 import javax.persistence.OneToMany;

 import javax.persistence.OneToOne;

 import javax.persistence.Table;

 import javax.persistence.Version;

 import org.apache.commons.lang.builder.ToStringBuilder;

 import org.hibernate.annotations.Fetch;

 import org.hibernate.annotations.FetchMode;

 import org.hibernate.annotations.GenericGenerator;

 import org.hibernate.annotations.Parameter;

 import org.kuali.rice.core.framework.persistence.jpa.OrmUtils;

 import org.kuali.rice.kew.api.document.node.RouteNodeInstanceState;

 import org.kuali.rice.kew.doctype.bo.DocumentType;

 import org.kuali.rice.kew.routeheader.DocumentRouteHeaderValue;

 import org.kuali.rice.kew.service.KEWServiceLocator;

 /**

  * Represents a materialized instance of a {@link RouteNode} definition on a {@link DocumentRouteHeaderValue}.  Node instances

  * are generated by the engine using the {@link RouteNode} as a prototype and connected as a 

  * Directed Acyclic Graph.

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 @Entity

 @Table(name="KREW_RTE_NODE_INSTN_T")

 //@Sequence(name="KREW_RTE_NODE_S",property="routeNodeInstanceId")

 @NamedQueries({

         @NamedQuery(name="RouteNodeInstance.FindByRouteNodeInstanceId",query="select r from RouteNodeInstance r where r.routeNodeInstanceId = :routeNodeInstanceId"),

         @NamedQuery(name="RouteNodeInstance.FindActiveNodeInstances",query="select r from RouteNodeInstance r where r.documentId = :documentId and r.active = true"),

         @NamedQuery(name="RouteNodeInstance.FindTerminalNodeInstances",query="select r from RouteNodeInstance r where r.documentId = :documentId and r.active = false and r.complete = true"),

         @NamedQuery(name="RouteNodeInstance.FindInitialNodeInstances",query="select d.initialRouteNodeInstances from DocumentRouteHeaderValue d where d.documentId = :documentId"),

         @NamedQuery(name="RouteNodeInstance.FindProcessNodeInstances", query="select r from RouteNodeInstance r where r.process.routeNodeInstanceId = :processId"),

         @NamedQuery(name="RouteNodeInstance.FindRouteNodeInstances", query="select r from RouteNodeInstance r where r.documentId = :documentId")

 })

 public class RouteNodeInstance implements Serializable {

         private static final long serialVersionUID = 7183670062805580420L;

         @Id

         @GeneratedValue(generator="KREW_RTE_NODE_S")

         @GenericGenerator(name="KREW_RTE_NODE_S",strategy="org.hibernate.id.enhanced.SequenceStyleGenerator",parameters={

                         @Parameter(name="sequence_name",value="KREW_RTE_NODE_S"),

                         @Parameter(name="value_column",value="id")

         })

         @Column(name="RTE_NODE_INSTN_ID")

         private String routeNodeInstanceId;

     @Column(name="DOC_HDR_ID")

         private String documentId;

     @ManyToOne(cascade={CascadeType.PERSIST, CascadeType.MERGE})

         @JoinColumn(name="BRCH_ID")

         private Branch branch;

     @OneToOne(fetch=FetchType.EAGER)

         @JoinColumn(name="RTE_NODE_ID")

     private RouteNode routeNode;

     @Column(name="ACTV_IND")

     private boolean active = false;

     @Column(name="CMPLT_IND")

     private boolean complete = false;

     @Column(name="INIT_IND")

     private boolean initial = true;

     @OneToOne(fetch=FetchType.EAGER,cascade={CascadeType.PERSIST, CascadeType.MERGE})

         @JoinColumn(name="PROC_RTE_NODE_INSTN_ID")

         private RouteNodeInstance process;

     @ManyToMany(fetch=FetchType.EAGER,cascade={CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REMOVE})

     @JoinTable(name = "KREW_RTE_NODE_INSTN_LNK_T", joinColumns = @JoinColumn(name = "FROM_RTE_NODE_INSTN_ID"), inverseJoinColumns = @JoinColumn(name = "TO_RTE_NODE_INSTN_ID"))

     @Fetch(value = FetchMode.SELECT)

     private List<RouteNodeInstance> nextNodeInstances = new ArrayList<RouteNodeInstance>();

     @ManyToMany(fetch=FetchType.EAGER, mappedBy="nextNodeInstances")

     @Fetch(value = FetchMode.SELECT)

     //@JoinTable(name = "KREW_RTE_NODE_INSTN_LNK_T", joinColumns = @JoinColumn(name = "TO_RTE_NODE_INSTN_ID"), inverseJoinColumns = @JoinColumn(name = "FROM_RTE_NODE_INSTN_ID"))

     private List<RouteNodeInstance> previousNodeInstances = new ArrayList<RouteNodeInstance>();

     @OneToMany(fetch=FetchType.EAGER,cascade={CascadeType.PERSIST, CascadeType.REMOVE, CascadeType.MERGE}, mappedBy="nodeInstance", orphanRemoval=true)    

     @Fetch(value = FetchMode.SELECT)

     private List<NodeState> state = new ArrayList<NodeState>();

     @Version

         @Column(name="VER_NBR")

         private Integer lockVerNbr;

     public boolean isActive() {

         return active;

     }

     public void setActive(boolean active) {

         this.active = active;

     }

     public boolean isComplete() {

         return complete;

     }

     public void setComplete(boolean complete) {

         this.complete = complete;

     }

     public Branch getBranch() {

         return branch;

     }

     public void setBranch(Branch branch) {

         this.branch = branch;

     }

     public RouteNode getRouteNode() {

         return routeNode;

     }

     public void setRouteNode(RouteNode node) {

         this.routeNode = node;

     }

     public String getRouteNodeInstanceId() {

         return routeNodeInstanceId;

     }

     public void setRouteNodeInstanceId(String routeNodeInstanceId) {

         this.routeNodeInstanceId = routeNodeInstanceId;

     }

     public String getDocumentId() {

         return documentId;

     }

     public void setDocumentId(String documentId) {

         this.documentId = documentId;

     }

     public List<RouteNodeInstance> getNextNodeInstances() {

         return nextNodeInstances;

     }

     public RouteNodeInstance getNextNodeInstance(int index) {

             while (getNextNodeInstances().size() <= index) {

                     nextNodeInstances.add(new RouteNodeInstance());

             }

             return (RouteNodeInstance) getNextNodeInstances().get(index);

     }

     public void setNextNodeInstances(List<RouteNodeInstance> nextNodeInstances) {

         this.nextNodeInstances = nextNodeInstances;

     }

     public List<RouteNodeInstance> getPreviousNodeInstances() {

         return previousNodeInstances;

     }

     public RouteNodeInstance getPreviousNodeInstance(int index) {

             while (previousNodeInstances.size() <= index) {

                     previousNodeInstances.add(new RouteNodeInstance());

             }

             return (RouteNodeInstance) getPreviousNodeInstances().get(index);

     }

     public void setPreviousNodeInstances(List<RouteNodeInstance> previousNodeInstances) {

         this.previousNodeInstances = previousNodeInstances;

     }

     public boolean isInitial() {

         return initial;

     }

     public void setInitial(boolean initial) {

         this.initial = initial;

     }

     public List<NodeState> getState() {

         return state;

     }

     public void setState(List<NodeState> state) {

         this.state.clear();

             this.state.addAll(state);

         //this.state = state;

     }

     public RouteNodeInstance getProcess() {

                 return process;

         }

         public void setProcess(RouteNodeInstance process) {

                 this.process = process;

         }

         public Integer getLockVerNbr() {

         return lockVerNbr;

     }

     public void setLockVerNbr(Integer lockVerNbr) {

         this.lockVerNbr = lockVerNbr;

     }

     public NodeState getNodeState(String key) {

         for (Iterator iter = getState().iterator(); iter.hasNext();) {

             NodeState nodeState = (NodeState) iter.next();

             if (nodeState.getKey().equals(key)) {

                 return nodeState;

             }

         }

         return null;

     }

     public void addNodeState(NodeState state) {

         this.state.add(state);

         state.setNodeInstance(this);

     }

     public void removeNodeState(String key) {

         for (Iterator iter = getState().iterator(); iter.hasNext();) {

             NodeState nodeState = (NodeState) iter.next();

             if (nodeState.getKey().equals(key)) {

                 iter.remove();

                 break;

             }

         }

     }

     public void addNextNodeInstance(RouteNodeInstance nextNodeInstance) {

         nextNodeInstances.add(nextNodeInstance);

         nextNodeInstance.getPreviousNodeInstances().add(this);

     }

     public void removeNextNodeInstance(RouteNodeInstance nextNodeInstance) {

         nextNodeInstances.remove(nextNodeInstance);

         nextNodeInstance.getPreviousNodeInstances().remove(this);

     }

     public void clearNextNodeInstances() {

         for (Iterator iterator = nextNodeInstances.iterator(); iterator.hasNext();) {

             RouteNodeInstance nextNodeInstance = (RouteNodeInstance) iterator.next();

             iterator.remove();

             nextNodeInstance.getPreviousNodeInstances().remove(this);

         }

     }

     public String getName() {

         return (getRouteNode() == null ? null : getRouteNode().getRouteNodeName());

     }

     public boolean isInProcess() {

         return getProcess() != null;

     }

     public DocumentType getDocumentType() {

         return KEWServiceLocator.getDocumentTypeService().findByDocumentId(getDocumentId());

     }

     /*

      * methods used to display route node instances' data on documentoperation.jsp

      */

     public NodeState getNodeStateByIndex(int index){

             while (state.size() <= index) {

             state.add(new NodeState());

         }

         return (NodeState) getState().get(index);

     }   

     public void populateState(List<NodeState> state) {

         this.state.addAll(state);

      }

     public String toString() {

         return new ToStringBuilder(this)

             .append("routeNodeInstanceId", routeNodeInstanceId)

             .append("documentId", documentId)

             .append("branch", branch == null ? null : branch.getBranchId())

             .append("routeNode", routeNode == null ? null : routeNode.getRouteNodeName())

             .append("active", active)

             .append("complete", complete)

             .append("initial", initial)

             .append("process", process)

             .append("nextNodeInstances", nextNodeInstances == null ? null : nextNodeInstances.size())

             .append("previousNodeInstances", previousNodeInstances == null ? null : previousNodeInstances.size())

             .append("state", state == null ? null : state.size())

             .toString();

     }

         //@PrePersist

         public void beforeInsert(){

                 OrmUtils.populateAutoIncValue(this, KEWServiceLocator.getEntityManagerFactory().createEntityManager());

         }

         public static org.kuali.rice.kew.api.document.node.RouteNodeInstance to(RouteNodeInstance routeNodeInstance) {

                 if (routeNodeInstance == null) {

                         return null;

                 }

                 org.kuali.rice.kew.api.document.node.RouteNodeInstance.Builder builder = org.kuali.rice.kew.api.document.node

                 .RouteNodeInstance.Builder.create();

                 builder.setActive(routeNodeInstance.isActive());

                 builder.setBranchId(routeNodeInstance.getBranch().getBranchId());

                 builder.setComplete(routeNodeInstance.isComplete());

                 builder.setDocumentId(routeNodeInstance.getDocumentId());

                 builder.setId(routeNodeInstance.getRouteNodeInstanceId());

                 builder.setInitial(routeNodeInstance.isInitial());

                 builder.setName(routeNodeInstance.getName());

                 if (routeNodeInstance.getProcess() != null) {

                         builder.setProcessId(routeNodeInstance.getProcess().getRouteNodeInstanceId());

                 }

                 builder.setRouteNodeId(routeNodeInstance.getRouteNode().getRouteNodeId());

                 List<RouteNodeInstanceState.Builder> states = new ArrayList<RouteNodeInstanceState.Builder>();

                 for (NodeState stateBo : routeNodeInstance.getState()) {

                         RouteNodeInstanceState.Builder stateBuilder = RouteNodeInstanceState.Builder.create();

                         stateBuilder.setId(stateBo.getStateId());

                         stateBuilder.setKey(stateBo.getKey());

                         stateBuilder.setValue(stateBo.getValue());

                         states.add(stateBuilder);

                 }

                 builder.setState(states);

         List<org.kuali.rice.kew.api.document.node.RouteNodeInstance.Builder> nextNodes = new ArrayList<org.kuali.rice.kew.api.document.node.RouteNodeInstance.Builder>();

         if (routeNodeInstance.getNextNodeInstances() != null) {

             for (RouteNodeInstance next : routeNodeInstance.getNextNodeInstances()) {

                 // will this make things blow up?

                 nextNodes.add(org.kuali.rice.kew.api.document.node.RouteNodeInstance.Builder.create(RouteNodeInstance.to(next)));

             }

         }

         builder.setNextNodeInstances(nextNodes);

                 return builder.build();

         }

 }