/*

  * Copyright 2007 The Kuali Foundation Licensed under the Educational Community

  * License, Version 1.0 (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.krad.uif.container;

 import java.util.ArrayList;

 import java.util.List;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.mo.common.active.Inactivatable;

 import org.kuali.rice.krad.uif.UifConstants;

 import org.kuali.rice.krad.uif.UifParameters;

 import org.kuali.rice.krad.uif.core.ActiveCollectionFilter;

 import org.kuali.rice.krad.uif.core.BindingInfo;

 import org.kuali.rice.krad.uif.core.CollectionFilter;

 import org.kuali.rice.krad.uif.core.Component;

 import org.kuali.rice.krad.uif.core.DataBinding;

 import org.kuali.rice.krad.uif.field.ActionField;

 import org.kuali.rice.krad.uif.field.AttributeField;

 import org.kuali.rice.krad.uif.field.Field;

 import org.kuali.rice.krad.uif.field.LabelField;

 import org.kuali.rice.krad.uif.util.ComponentUtils;

 /**

  * Group that holds a collection of objects and configuration for presenting the

  * collection in the UI. Supports functionality such as add line, line actions,

  * and nested collections.

  * 

  * <p>

  * Note the standard header/footer can be used to give a header to the

  * collection as a whole, or to provide actions that apply to the entire

  * collection

  * </p>

  * 

  * <p>

  * For binding purposes the binding path of each row field is indexed. The name

  * property inherited from <code>ComponentBase</code> is used as the collection

  * name. The collectionObjectClass property is used to lookup attributes from

  * the data dictionary.

  * </p>

  * 

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

  */

 public class CollectionGroup extends Group implements DataBinding {

     private static final long serialVersionUID = -6496712566071542452L;

     private Class<?> collectionObjectClass;

     private String propertyName;

     private BindingInfo bindingInfo;

     private boolean renderAddLine;

     private String addLinePropertyName;

     private BindingInfo addLineBindingInfo;

     private LabelField addLineLabelField;

     private List<? extends Field> addLineFields;

     private List<ActionField> addLineActionFields;

     private boolean renderLineActions;

     private List<ActionField> actionFields;

     private boolean showInactive;

     private CollectionFilter activeCollectionFilter;

     private List<CollectionGroup> subCollections;

     private CollectionGroupBuilder collectionGroupBuilder;

     public CollectionGroup() {

         renderAddLine = true;

         renderLineActions = true;

         showInactive = false;

         actionFields = new ArrayList<ActionField>();

         addLineFields = new ArrayList<Field>();

         addLineActionFields = new ArrayList<ActionField>();

         subCollections = new ArrayList<CollectionGroup>();

     }

     /**

      * The following actions are performed:

      *

      * <ul>

      * <li>Set fieldBindModelPath to the collection model path (since the fields

      * have to belong to the same model as the collection)</li>

      * <li>Set defaults for binding</li>

      * <li>Default add line field list to groups items list</li>

      * <li>Sets default active collection filter if not set</li>

      * <li>Sets the dictionary entry (if blank) on each of the items to the

      * collection class</li>

      * </ul>

      *

      * @see org.kuali.rice.krad.uif.core.ComponentBase#performInitialization(org.kuali.rice.krad.uif.container.View)

      */

     @Override

     public void performInitialization(View view) {

         setFieldBindingObjectPath(getBindingInfo().getBindingObjectPath());

         super.performInitialization(view);

         if (bindingInfo != null) {

             bindingInfo.setDefaults(view, getPropertyName());

         }

         if (addLineBindingInfo != null) {

             // add line binds to model property

             if (StringUtils.isNotBlank(addLinePropertyName)) {

                 addLineBindingInfo.setDefaults(view, getPropertyName());

                 addLineBindingInfo.setBindingName(addLinePropertyName);

                 if (StringUtils.isNotBlank(getFieldBindByNamePrefix())) {

                     addLineBindingInfo.setBindByNamePrefix(getFieldBindByNamePrefix());

                 }

             }

         }

         for (Component item : getItems()) {

             if (item instanceof AttributeField) {

                 AttributeField field = (AttributeField) item;

                 if (StringUtils.isBlank(field.getDictionaryObjectEntry())) {

                     field.setDictionaryObjectEntry(collectionObjectClass.getName());

                 }

             }

         }

         if ((addLineFields == null) || addLineFields.isEmpty()) {

             addLineFields = getItems();

         }

         // if active collection filter not set use default

         if (this.activeCollectionFilter == null) {

             activeCollectionFilter = new ActiveCollectionFilter();

         }

         // set static collection path on items

         String collectionPath = "";

         if (StringUtils.isNotBlank(getBindingInfo().getCollectionPath())) {

             collectionPath += getBindingInfo().getCollectionPath() + ".";

         }

         if (StringUtils.isNotBlank(getBindingInfo().getBindByNamePrefix())) {

             collectionPath += getBindingInfo().getBindByNamePrefix() + ".";

         }

         collectionPath += getBindingInfo().getBindingName();

         List<AttributeField> collectionFields = ComponentUtils.getComponentsOfTypeDeep(getItems(), AttributeField.class);

         for (AttributeField collectionField : collectionFields) {

             collectionField.getBindingInfo().setCollectionPath(collectionPath);

         }

         for (CollectionGroup collectionGroup : getSubCollections()) {

             collectionGroup.getBindingInfo().setCollectionPath(collectionPath);

             view.getViewHelperService().performComponentInitialization(view, collectionGroup);

         }

         // add collection entry to abstract classes

         if (!view.getAbstractTypeClasses().containsKey(collectionPath)) {

             view.getAbstractTypeClasses().put(collectionPath, getCollectionObjectClass());

         }

         // initialize container items and sub-collections (since they are not in

         // child list)

         for (Component item : getItems()) {

             view.getViewHelperService().performComponentInitialization(view, item);

         }

     }

     /**

      * Calls the configured <code>CollectionGroupBuilder</code> to build the

      * necessary components based on the collection data

      * 

      * @see org.kuali.rice.krad.uif.container.ContainerBase#performApplyModel(org.kuali.rice.krad.uif.container.View,

      *      java.lang.Object)

      */

     @Override

     public void performApplyModel(View view, Object model) {

         super.performApplyModel(view, model);

         pushCollectionGroupToReference();

         performCollectionFiltering(view, model);

         getCollectionGroupBuilder().build(view, model, this);

     }

     /**

      * Sets a reference in the context map for all nested components to the collection group

      * instance, and sets name as parameter for an action fields in the group

      */

     protected void pushCollectionGroupToReference() {

         ComponentUtils

                 .pushObjectToContext(this.getNestedComponents(), UifConstants.ContextVariableNames.COLLECTION_GROUP,

                         this);

         List<ActionField> actionFields =

                 ComponentUtils.getComponentsOfTypeDeep(this.getNestedComponents(), ActionField.class);

         for (ActionField actionField : actionFields) {

             actionField.addActionParameter(UifParameters.SELLECTED_COLLECTION_PATH,

                     this.getBindingInfo().getBindingPath());

         }

     }

     /**

      * Performs any filtering necessary on the collection before building the collection fields

      *

      * <p>

      * If showInactive is set to false and the collection line type implements <code>Inactivatable</code>,

      * invokes the active collection filer

      * </p>

      *

      * @param model - object containing the views data, from which the collection will be pulled

      */

     protected void performCollectionFiltering(View view, Object model) {

         if (Inactivatable.class.isAssignableFrom(this.collectionObjectClass) && !showInactive) {

             this.activeCollectionFilter.filter(view, model, this);

         }

     }

     /**

      * New collection lines are handled in the framework by maintaining a map on

      * the form. The map contains as a key the collection name, and as value an

      * instance of the collection type. An entry is created here for the

      * collection represented by the <code>CollectionGroup</code> if an instance

      * is not available (clearExistingLine will force a new instance). The given

      * model must be a subclass of <code>UifFormBase</code> in order to find the

      * Map.

      * 

      * @param model

      *            - Model instance that contains the new collection lines Map

      * @param clearExistingLine

      *            - boolean that indicates whether the line should be set to a

      *            new instance if it already exists

      */

     public void initializeNewCollectionLine(View view, Object model, CollectionGroup collectionGroup,

             boolean clearExistingLine) {

         getCollectionGroupBuilder().initializeNewCollectionLine(view, model, collectionGroup, clearExistingLine);

     }

     /**

      * @see org.kuali.rice.krad.uif.container.ContainerBase#getNestedComponents()

      */

     @Override

     public List<Component> getNestedComponents() {

         List<Component> components = super.getNestedComponents();

         components.add(addLineLabelField);

         components.addAll(actionFields);

         components.addAll(addLineActionFields);

         // remove the containers items because we don't want them as children

         // (they will become children of the layout manager as the rows are

         // created)

         // TODO: is this necessary?

         for (Component item : getItems()) {

             if (components.contains(item)) {

                 components.remove(item);

             }

         }

         return components;

     }

     /**

      * Object class the collection maintains. Used to get dictionary information

      * in addition to creating new instances for the collection when necessary

      * 

      * @return Class<?> collection object class

      */

     public Class<?> getCollectionObjectClass() {

         return this.collectionObjectClass;

     }

     /**

      * Setter for the collection object class

      * 

      * @param collectionObjectClass

      */

     public void setCollectionObjectClass(Class<?> collectionObjectClass) {

         this.collectionObjectClass = collectionObjectClass;

     }

     /**

      * @see org.kuali.rice.krad.uif.core.DataBinding#getPropertyName()

      */

     public String getPropertyName() {

         return this.propertyName;

     }

     /**

      * Setter for the collections property name

      * 

      * @param propertyName

      */

     public void setPropertyName(String propertyName) {

         this.propertyName = propertyName;

     }

     /**

      * Determines the binding path for the collection. Used to get the

      * collection value from the model in addition to setting the binding path

      * for the collection attributes

      * 

      * @see org.kuali.rice.krad.uif.core.DataBinding#getBindingInfo()

      */

     public BindingInfo getBindingInfo() {

         return this.bindingInfo;

     }

     /**

      * Setter for the binding info instance

      * 

      * @param bindingInfo

      */

     public void setBindingInfo(BindingInfo bindingInfo) {

         this.bindingInfo = bindingInfo;

     }

     /**

      * Action fields that should be rendered for each collection line. Example

      * line action is the delete action

      * 

      * @return List<ActionField> line action fields

      */

     public List<ActionField> getActionFields() {

         return this.actionFields;

     }

     /**

      * Setter for the line action fields list

      * 

      * @param actionFields

      */

     public void setActionFields(List<ActionField> actionFields) {

         this.actionFields = actionFields;

     }

     /**

      * Indicates whether the action column for the collection should be rendered

      * 

      * @return boolean true if the actions should be rendered, false if not

      * @see #getActionFields()

      */

     public boolean isRenderLineActions() {

         return this.renderLineActions;

     }

     /**

      * Setter for the render line actions indicator

      * 

      * @param renderLineActions

      */

     public void setRenderLineActions(boolean renderLineActions) {

         this.renderLineActions = renderLineActions;

     }

     /**

      * Indicates whether an add line should be rendered for the collection

      * 

      * @return boolean true if add line should be rendered, false if it should

      *         not be

      */

     public boolean isRenderAddLine() {

         return this.renderAddLine;

     }

     /**

      * Setter for the render add line indicator

      * 

      * @param renderAddLine

      */

     public void setRenderAddLine(boolean renderAddLine) {

         this.renderAddLine = renderAddLine;

     }

     /**

      * Convenience getter for the add line label field text. The text is used to

      * label the add line when rendered and its placement depends on the

      * <code>LayoutManager</code>.

      * <p>

      * For the <code>TableLayoutManager</code> the label appears in the sequence

      * column to the left of the add line fields. For the

      * <code>StackedLayoutManager</code> the label is placed into the group

      * header for the line.

      * </p>

      * 

      * @return String add line label

      */

     public String getAddLineLabel() {

         if (getAddLineLabelField() != null) {

             return getAddLineLabelField().getLabelText();

         }

         return null;

     }

     /**

      * Setter for the add line label text

      * 

      * @param addLineLabel

      */

     public void setAddLineLabel(String addLineLabel) {

         if (getAddLineLabelField() != null) {

             getAddLineLabelField().setLabelText(addLineLabel);

         }

     }

     /**

      * <code>LabelField</code> instance for the add line label

      * 

      * @return LabelField add line label field

      * @see #getAddLineLabel()

      */

     public LabelField getAddLineLabelField() {

         return this.addLineLabelField;

     }

     /**

      * Setter for the <code>LabelField</code> instance for the add line label

      * 

      * @param addLineLabelField

      * @see #getAddLineLabel()

      */

     public void setAddLineLabelField(LabelField addLineLabelField) {

         this.addLineLabelField = addLineLabelField;

     }

     /**

      * Name of the property that contains an instance for the add line. If set

      * this is used with the binding info to create the path to the add line.

      * Can be left blank in which case the framework will manage the add line

      * instance in a generic map.

      * 

      * @return String add line property name

      */

     public String getAddLinePropertyName() {

         return this.addLinePropertyName;

     }

     /**

      * Setter for the add line property name

      * 

      * @param addLinePropertyName

      */

     public void setAddLinePropertyName(String addLinePropertyName) {

         this.addLinePropertyName = addLinePropertyName;

     }

     /**

      * <code>BindingInfo</code> instance for the add line property used to

      * determine the full binding path. If add line name given

      * {@link #getAddLineLabel()} then it is set as the binding name on the

      * binding info. Add line label and binding info are not required, in which

      * case the framework will manage the new add line instances through a

      * generic map (model must extend UifFormBase)

      * 

      * @return BindingInfo add line binding info

      */

     public BindingInfo getAddLineBindingInfo() {

         return this.addLineBindingInfo;

     }

     /**

      * Setter for the add line binding info

      * 

      * @param addLineBindingInfo

      */

     public void setAddLineBindingInfo(BindingInfo addLineBindingInfo) {

         this.addLineBindingInfo = addLineBindingInfo;

     }

     /**

      * List of <code>Field</code> instances that should be rendered for the

      * collection add line (if enabled). If not set, the default group's items

      * list will be used

      * 

      * @return List<? extends Field> add line field list

      */

     public List<? extends Field> getAddLineFields() {

         return this.addLineFields;

     }

     /**

      * Setter for the add line field list

      * 

      * @param addLineFields

      */

     public void setAddLineFields(List<? extends Field> addLineFields) {

         this.addLineFields = addLineFields;

     }

     /**

      * Action fields that should be rendered for the add line. This is generally

      * the add action (button) but can be configured to contain additional

      * actions

      * 

      * @return List<ActionField> add line action fields

      */

     public List<ActionField> getAddLineActionFields() {

         return this.addLineActionFields;

     }

     /**

      * Setter for the add line action fields

      * 

      * @param addLineActionFields

      */

     public void setAddLineActionFields(List<ActionField> addLineActionFields) {

         this.addLineActionFields = addLineActionFields;

     }

     /**

      * Indicates whether inactive collections lines should be displayed

      *

      * <p>

      * Setting only applies when the collection line type implements the

      * <code>Inactivatable</code> interface. If true and showInactive is

      * set to false, the collection will be filtered to remove any items

      * whose active status returns false

      * </p>

      *

      * @return boolean true to show inactive records, false to not render inactive records

      */

     public boolean isShowInactive() {

         return showInactive;

     }

     /**

      * Setter for the show inactive indicator

      *

      * @param boolean show inactive

      */

     public void setShowInactive(boolean showInactive) {

         this.showInactive = showInactive;

     }

     /**

      * Collection filter instance for filtering the collection data when the

      * showInactive flag is set to false

      *

      * @return CollectionFilter

      */

     public CollectionFilter getActiveCollectionFilter() {

         return activeCollectionFilter;

     }

     /**

      * Setter for the collection filter to use for filter inactive records from the

      * collection

      *

      * @param activeCollectionFilter - CollectionFilter instance

      */

     public void setActiveCollectionFilter(CollectionFilter activeCollectionFilter) {

         this.activeCollectionFilter = activeCollectionFilter;

     }

     /**

      * List of <code>CollectionGroup</code> instances that are sub-collections

      * of the collection represented by this collection group

      * 

      * @return List<CollectionGroup> sub collections

      */

     public List<CollectionGroup> getSubCollections() {

         return this.subCollections;

     }

     /**

      * Setter for the sub collection list

      * 

      * @param subCollections

      */

     public void setSubCollections(List<CollectionGroup> subCollections) {

         this.subCollections = subCollections;

     }

     /**

      * <code>CollectionGroupBuilder</code> instance that will build the

      * components dynamically for the collection instance

      * 

      * @return CollectionGroupBuilder instance

      */

     public CollectionGroupBuilder getCollectionGroupBuilder() {

         if (this.collectionGroupBuilder == null) {

             this.collectionGroupBuilder = new CollectionGroupBuilder();

         }

         return this.collectionGroupBuilder;

     }

     /**

      * Setter for the collection group building instance

      * 

      * @param collectionGroupBuilder

      */

     public void setCollectionGroupBuilder(CollectionGroupBuilder collectionGroupBuilder) {

         this.collectionGroupBuilder = collectionGroupBuilder;

     }

     /**

      * @see org.kuali.rice.krad.uif.container.ContainerBase#getItems()

      */

     @SuppressWarnings("unchecked")

     @Override

     public List<? extends Field> getItems() {

         return (List<? extends Field>) super.getItems();

     }

 }