info.magnolia.ui.form.field.transformer.multi
Class MultiValueChildrenNodeTransformer

java.lang.Object
  info.magnolia.ui.form.field.transformer.basic.BasicTransformer<com.vaadin.data.util.PropertysetItem>
      info.magnolia.ui.form.field.transformer.multi.MultiValueChildrenNodeTransformer

All Implemented Interfaces:

I18NAwareHandler, Transformer<com.vaadin.data.util.PropertysetItem>

Direct Known Subclasses:

MultiValueSubChildrenNodePropertiesTransformer, MultiValueSubChildrenNodeTransformer

public class MultiValueChildrenNodeTransformer
extends BasicTransformer<com.vaadin.data.util.PropertysetItem>

Sub Nodes implementation of Transformer storing and retrieving properties (as PropertysetItem) displayed in MultiField.
Storage strategy:
- root node (relatedFormItem)
-- child node 1 (used to store the first value of the MultiField as a property)
--- property1 (store the first value of the MultiField)
-- child node 2 (used to store the second value of the MultiField as a property)
--- property2 (store the second value of the MultiField)
...
Each element of the MultiField is stored in a property located in a child node of the root node.
Child node name : Incremental number (00, 01,....)
Property name : field name
Override createChildItemName(Set, Object, JcrNodeAdapter) to define the child node name.
Override setChildValuePropertyName(String) to change the property name used to store the MultiField value element.

Field Summary

Fields inherited from class info.magnolia.ui.form.field.transformer.basic.BasicTransformer

basePropertyName, definition, i18NPropertyName, relatedFormItem, type

Constructor Summary

MultiValueChildrenNodeTransformer(com.vaadin.data.Item relatedFormItem, ConfiguredFieldDefinition definition, Class<com.vaadin.data.util.PropertysetItem> type)

Method Summary

protected String	createChildItemName(Set<String> childNames, Object value, JcrNodeAdapter rootItem) Basic Implementation that create child Nodes with increasing number as Name.
protected org.apache.jackrabbit.commons.predicate.Predicate	createPredicateToEvaluateChildNode() Create a Predicate used to evaluate the child node of the root to handle. Only return child node that have a number name's.
protected JcrNodeAdapter	getOrCreateChildNode(String childNodeName, String childNodeType) Retrieve or create a child node as JcrNodeAdapter.
protected JcrNodeAdapter	getRootItem() Define the root Item used in order to set the SubNodes list.
protected List<javax.jcr.Node>	getStoredChildNodes(JcrNodeAdapter parent) Get all childNodes of parent passing the Predicate created by createPredicateToEvaluateChildNode() or with type NodeTypes.ContentNode.NAME if the Predicate is null.
protected Object	getValueFromChildNode(javax.jcr.Node child) Return a specific value from the child node.
protected void	handleRootitemAndParent(JcrNodeAdapter rootItem) Handle the relation between parent and rootItem. Typically, if rootItem would be a child of parentItem:
boolean	hasI18NSupport() No I18N Support implemented for subNode.
protected JcrNodeAdapter	initializeChildItem(JcrNodeAdapter rootItem, javax.jcr.Node rootNode, String childName) Create a Child Item. - if the related node already has a Child Node called 'childName', initialize the ChildItem based on this child Node. - else create a new JcrNodeAdapter.
com.vaadin.data.util.PropertysetItem	readFromItem() Retrieve a list of values based on the sub nodes. - get a list of childNodes to handle - for each childNode retrieve the value to set to the PropertysetItem If no childNodes are present, return an empty PropertysetItem.
protected void	setChildItemValue(JcrNodeAdapter childItem, Object value) Set the value as property to the childItem.
void	setChildValuePropertyName(String newName)
protected void	setNewChildItem(JcrNodeAdapter rootItem, com.vaadin.data.util.PropertysetItem newValue)
void	writeToItem(com.vaadin.data.util.PropertysetItem newValue) Create new Child Items based on the newValues.

Methods inherited from class info.magnolia.ui.form.field.transformer.basic.BasicTransformer

definePropertyName, getBasePropertyName, getLocale, getOrCreateProperty, getType, setI18NPropertyName, setLocale, setType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MultiValueChildrenNodeTransformer

public MultiValueChildrenNodeTransformer(com.vaadin.data.Item relatedFormItem,
                                         ConfiguredFieldDefinition definition,
                                         Class<com.vaadin.data.util.PropertysetItem> type)

Method Detail

hasI18NSupport

public boolean hasI18NSupport()

No I18N Support implemented for subNode.

Specified by:

hasI18NSupport in interface Transformer<com.vaadin.data.util.PropertysetItem>

Overrides:

hasI18NSupport in class BasicTransformer<com.vaadin.data.util.PropertysetItem>

readFromItem

public com.vaadin.data.util.PropertysetItem readFromItem()

Retrieve a list of values based on the sub nodes.
- get a list of childNodes to handle
- for each childNode retrieve the value to set to the PropertysetItem
If no childNodes are present, return an empty PropertysetItem.

Specified by:

readFromItem in interface Transformer<com.vaadin.data.util.PropertysetItem>

Overrides:

readFromItem in class BasicTransformer<com.vaadin.data.util.PropertysetItem>

writeToItem

public void writeToItem(com.vaadin.data.util.PropertysetItem newValue)

Create new Child Items based on the newValues.
- on the rootItem, create or update childItems based on the newValues (one ChildItem per new Value). - remove the no more existing child from the source Item.

Specified by:

writeToItem in interface Transformer<com.vaadin.data.util.PropertysetItem>

Overrides:

writeToItem in class BasicTransformer<com.vaadin.data.util.PropertysetItem>

getRootItem

protected JcrNodeAdapter getRootItem()

Define the root Item used in order to set the SubNodes list.

getStoredChildNodes

protected List<javax.jcr.Node> getStoredChildNodes(JcrNodeAdapter parent)

Get all childNodes of parent passing the Predicate created by createPredicateToEvaluateChildNode() or
with type NodeTypes.ContentNode.NAME if the Predicate is null.

createPredicateToEvaluateChildNode

protected org.apache.jackrabbit.commons.predicate.Predicate createPredicateToEvaluateChildNode()

Create a Predicate used to evaluate the child node of the root to handle.
Only return child node that have a number name's.

getValueFromChildNode

protected Object getValueFromChildNode(javax.jcr.Node child)

Return a specific value from the child node.

setNewChildItem

protected void setNewChildItem(JcrNodeAdapter rootItem,
                               com.vaadin.data.util.PropertysetItem newValue)

setChildItemValue

protected void setChildItemValue(JcrNodeAdapter childItem,
                                 Object value)

Set the value as property to the childItem.

initializeChildItem

protected JcrNodeAdapter initializeChildItem(JcrNodeAdapter rootItem,
                                             javax.jcr.Node rootNode,
                                             String childName)
                                      throws javax.jcr.PathNotFoundException,
                                             javax.jcr.RepositoryException

Create a Child Item.
- if the related node already has a Child Node called 'childName', initialize the ChildItem based on this child Node.
- else create a new JcrNodeAdapter.

Throws:

javax.jcr.PathNotFoundException

javax.jcr.RepositoryException

handleRootitemAndParent

protected void handleRootitemAndParent(JcrNodeAdapter rootItem)

Handle the relation between parent and rootItem.
Typically, if rootItem would be a child of parentItem:

if (childItem.getChildren() != null && !childItem.getChildren().isEmpty()) { ((JcrNodeAdapter) parent).addChild(childItem); } else { ((JcrNodeAdapter) parent).removeChild(childItem); }

createChildItemName

protected String createChildItemName(Set<String> childNames,
                                     Object value,
                                     JcrNodeAdapter rootItem)

Basic Implementation that create child Nodes with increasing number as Name.

setChildValuePropertyName

public void setChildValuePropertyName(String newName)

getOrCreateChildNode

protected JcrNodeAdapter getOrCreateChildNode(String childNodeName,
                                              String childNodeType)
                                       throws javax.jcr.RepositoryException

Retrieve or create a child node as JcrNodeAdapter.

Throws:

javax.jcr.RepositoryException