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## org.eclipse.birt.report.model.api
Class DataItemHandle

    java.lang.Object
      org.eclipse.birt.report.model.api.DesignElementHandle
          org.eclipse.birt.report.model.api.ReportElementHandle
              org.eclipse.birt.report.model.api.ReportItemHandle
                  org.eclipse.birt.report.model.api.DataItemHandle

All Implemented Interfaces:
  IReportItemMethodContext, org.eclipse.birt.report.model.elements.interfaces.IDataItemModel, org.eclipse.birt.report.model.elements.interfaces.IDesignElementModel, org.eclipse.birt.report.model.elements.interfaces.IReportItemModel, org.eclipse.birt.report.model.elements.interfaces.IStyledElementModel

    public class DataItemHandle

extends ReportItemHandle
implements org.eclipse.birt.report.model.elements.interfaces.IDataItemModel

Represents a data item element. A data item has an action, value expression and help text.

See Also:
  `DataItem`

Field Summary

Fields inherited from class org.eclipse.birt.report.model.api.ReportItemHandle
`DATABINDING_TYPE_DATA, DATABINDING_TYPE_NONE, DATABINDING_TYPE_REPORT_ITEM_REF`

Fields inherited from class org.eclipse.birt.report.model.api.ReportElementHandle
`element`

Fields inherited from class org.eclipse.birt.report.model.api.DesignElementHandle
`module`

Fields inherited from interface org.eclipse.birt.report.model.elements.interfaces.IDataItemModel
`ACTION_PROP, HELP_TEXT_KEY_PROP, HELP_TEXT_PROP, RESULT_SET_COLUMN_PROP, VALUE_EXPR_PROP`

Fields inherited from interface org.eclipse.birt.report.model.elements.interfaces.IReportItemModel
`ACL_EXPRESSION_PROP, ALLOW_EXPORT_PROP, BOOKMARK_PROP, BOUND_DATA_COLUMNS_PROP, CASCADE_ACL_PROP, CUBE_PROP, DATA_BINDING_REF_PROP, DATA_SET_PROP, HEIGHT_PROP, MULTI_VIEWS_PROP, ON_CREATE_METHOD, ON_PAGE_BREAK_METHOD, ON_PREPARE_METHOD, ON_RENDER_METHOD, PARAM_BINDINGS_PROP, TOC_PROP, VISIBILITY_PROP, WIDTH_PROP, X_PROP, Y_PROP, Z_INDEX_PROP`

Fields inherited from interface org.eclipse.birt.report.model.elements.interfaces.IStyledElementModel
`STYLE_PROP`

Fields inherited from interface org.eclipse.birt.report.model.api.elements.IReportItemMethodContext
`ON_CREATE_CONTEXT, ON_PREPARE_CONTEXT, ON_RENDER_CONTEXT`

Fields inherited from interface org.eclipse.birt.report.model.elements.interfaces.IDesignElementModel
`COMMENTS_PROP, CUSTOM_XML_PROP, DISPLAY_NAME_ID_PROP, DISPLAY_NAME_PROP, EVENT_HANDLER_CLASS_PROP, EXTENDS_PROP, FULL_LABEL, ID_SUFFIX, NAME_PROP, NO_SLOT, PROPERTY_MASKS_PROP, REF_TEMPLATE_PARAMETER_PROP, SHORT_LABEL, USER_LABEL, USER_PROPERTIES_PROP, VIEW_ACTION_PROP`

Constructor Summary
`DataItemHandle(org.eclipse.birt.report.model.core.Module module, org.eclipse.birt.report.model.core.DesignElement element)` Constructs a handle of the data item with the given design and a data item.

Method Summary
`ActionHandle` | `getActionHandle()` Returns a handle to work with the action property, action is a structure that defines a hyperlink.
`java.lang.String` | `getDistinct()` Deprecated. by the drop function of Cell element.
`java.lang.String` | `getDistinctReset()` Deprecated. by the drop function of Cell element.
`java.lang.String` | `getHelpText()` Returns the help text of this data item.
`java.lang.String` | `getHelpTextKey()` Returns the help text resource key of this data item.
`java.lang.String` | `getResultSetColumn()` Gets the value of the result set column name property on this data item.
`java.lang.String` | `getResultSetExpression()` Looks the column name from the data binding element that is nearest to this data item.
`java.lang.String` | `getValueExpr()` Deprecated. As of BIRT version 2.1.0, replaced by getResultSetColumn( )
`ActionHandle` | `setAction(Action action)` Set an action on the image.
`void` | `setDistinct(java.lang.String distinct)` Deprecated. by the drop function of Cell element.
`void` | `setDistinctReset(java.lang.String value)` Deprecated. by the drop function of Cell element.
`void` | `setHelpText(java.lang.String value)` Sets the help text of this data item.
`void` | `setHelpTextKey(java.lang.String value)` Sets the resource key of the help text of this data item.
`void` | `setResultSetColumn(java.lang.String columnName)` Sets the value of the column name property.
`void` | `setValueExpr(java.lang.String expr)` Deprecated. As of BIRT version 2.1.0, replaced by setResultSetColumn(String columnName)

Methods inherited from class org.eclipse.birt.report.model.api.ReportItemHandle
`addColumnBinding, addTOC, addTOC, addView, allowExport, canCascadeACL, cascadeACL, columnBindingsIterator, dropView, findColumnBinding, getACLExpression, getAvailableBindings, getAvailableCubeBindingReferenceList, getAvailableDataBindingReferenceList, getAvailableDataSetBindingReferenceList, getBookmark, getColumnBindings, getCube, getCurrentView, getDataBindingReference, getDataBindingReferenceName, getDataBindingType, getDataSet, getHeight, getMethods, getNamedCubeBindingReferenceList, getNamedDataBindingReferenceList, getNamedDataSetBindingReferenceList, getOnCreate, getOnPageBreak, getOnPrepare, getOnRender, getTOC, getTocExpression, getViewHost, getViews, getWidth, getX, getY, getZIndex, paramBindingsIterator, removedColumnBinding, removedColumnBindings, removedUnusedColumnBindings, setACLExpression, setAllowExport, setBookmark, setCascadeACL, setCube, setCurrentView, setDataBindingReference, setDataSet, setHeight, setHeight, setOnCreate, setOnPageBreak, setOnPrepare, setOnRender, setTocExpression, setWidth, setWidth, setX, setX, setY, setY, setZIndex, visibilityRulesIterator`

Methods inherited from class org.eclipse.birt.report.model.api.ReportElementHandle
`getComments, getCustomXml, getDisplayName, getDisplayNameKey, getElement, getPropertyMask, isValidLayoutForCompoundElement, isValidReferenceForCompoundElement, propertyMaskIterator, setComments, setCustomXml, setDisplayName, setDisplayNameKey, setPropertyMask`

Methods inherited from class org.eclipse.birt.report.model.api.DesignElementHandle
`add, add, addElement, addElement, addListener, addUserPropertyDefn, cachePropertyHandles, canContain, canContain, canContain, canContain, canDrop, canEdit, canTransformToTemplate, clearAllProperties, clearContents, clearProperty, clientsIterator, copy, copyPropertyTo, createTemplateElement, derivedIterator, doSort, drop, drop, drop, dropAndClear, dropAndClear, dropAndClear, dropUserPropertyDefn, findContentSlot, getBooleanProperty, getChoices, getColorProperty, getContainer, getContainerPropertyHandle, getContainerSlotHandle, getContent, getContentCount, getContents, getDefn, getDesign, getDesignHandle, getDimensionProperty, getDisplayLabel, getDisplayLabel, getDisplayProperty, getEffectiveModule, getElementFactory, getElementProperty, getEventHandlerClass, getExtends, getExternalizedValue, getExternalizedValue, getExternalizedValue, getFactoryPropertyHandle, getFloatProperty, getFontProperty, getFullName, getHostViewHandle, getID, getIndex, getIntProperty, getListProperty, getListProperty, getMethods, getModule, getModuleHandle, getName, getNumberProperty, getPrivateStyle, getProperty, getPropertyBinding, getPropertyBindings, getPropertyDefn, getPropertyHandle, getPropertyIterator, getQualifiedName, getRoot, getSemanticErrors, getSlot, getStringProperty, getStyle, getUserProperties, getUserPropertyDefnHandle, getXPath, hasLocalProperties, hasSemanticError, initializeSlotHandles, isDirectionRTL, isTemplateParameterValue, isValid, localize, move, move, moveTo, moveTo, moveTo, moveTo, paste, paste, paste, paste, removeListener, revertToReportItem, revertToTemplate, semanticCheck, setEncryption, setEventHandlerClass, setExtends, setExtendsElement, setExtendsName, setFloatProperty, setIntProperty, setName, setNumberProperty, setProperties, setProperty, setPropertyBinding, setStringProperty, setStyle, setStyleElement, setStyleName, setValid, shift, showError`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### DataItemHandle

    public DataItemHandle(org.eclipse.birt.report.model.core.Module module,
                          org.eclipse.birt.report.model.core.DesignElement element)

  Constructs a handle of the data item with the given design and a data item. The application generally does not create handles directly. Instead, it uses one of the navigation methods available on other element handles.

  Parameters:
    `module` - the module
    `element` - the model representation of the element

Method Detail

### getActionHandle

    public ActionHandle getActionHandle()

  Returns a handle to work with the action property, action is a structure that defines a hyperlink.

  Returns:
    a handle to the action property, return `null` if the action has not been set on the data item.
  See Also:
    `ActionHandle`

### setAction

    public ActionHandle setAction(Action action)
                           throws SemanticException

  Set an action on the image.

  Parameters:
    `action` - new action to be set on the image, it represents a bookmark link, hyperlink, and drill through etc.
  Returns:
    a handle to the action property, return `null` if the action has not been set on the image.
  Throws:
    `SemanticException` - if member of the action is not valid.

### getDistinct

    public java.lang.String getDistinct()

  Deprecated. by the drop function of Cell element.

  Returns the value of the distinct property.

  Returns:
    the distinct value as a string

### setDistinct

    public void setDistinct(java.lang.String distinct)
                     throws SemanticException

  Deprecated. by the drop function of Cell element.

  Sets the value of the distinct property. The input value is defined in `DesignChoiceConstants` and is one of these:
  - DISTINCT_ALL
  - DISTINCT_REPEAT
  - DISTINCT_REPEAT_ON_PAGE

  Parameters:
    `distinct` - the distinct value as a string
  Throws:
    `SemanticException` - If the property is locked or the value is not one of the above.

### getDistinctReset

    public java.lang.String getDistinctReset()

  Deprecated. by the drop function of Cell element.

  Returns the value of the distinct-reset property.

  Returns:
    the distinct-set value as a string

### setDistinctReset

    public void setDistinctReset(java.lang.String value)
                          throws SemanticException

  Deprecated. by the drop function of Cell element.

  Returns the value of the distinct-reset property.

  Parameters:
    `value` - the distinct-set value as a string
  Throws:
    `SemanticException` - If the property is locked.

### getValueExpr

    public java.lang.String getValueExpr()

  Deprecated. As of BIRT version 2.1.0, replaced by getResultSetColumn( )

  Returns the expression that gives the value that the data item displays.

  Returns:
    the value expression
  See Also:
    `#getResultSetExpression()} for the shortcut function to get the value expression`

### setValueExpr

    public void setValueExpr(java.lang.String expr)
                      throws SemanticException

  Deprecated. As of BIRT version 2.1.0, replaced by setResultSetColumn(String columnName)

  Sets the expression for the value that the data item is to display. This method still can be used. However, if the user uses both this method and setResultSetColumn(String columnName), the result is unexpectable. It is strongly recommended to use ONLY one of two methods.

  Parameters:
    `expr` - the expression to set
  Throws:
    `SemanticException` - If the property is locked.
    `SemanticException`

### getHelpText

    public java.lang.String getHelpText()

  Returns the help text of this data item.

  Returns:
    the help text

### setHelpText

    public void setHelpText(java.lang.String value)
                     throws SemanticException

  Sets the help text of this data item.

  Parameters:
    `value` - the help text
  Throws:
    `SemanticException` - if the property is locked.

### getHelpTextKey

    public java.lang.String getHelpTextKey()

  Returns the help text resource key of this data item.

  Returns:
    the help text key

### setHelpTextKey

    public void setHelpTextKey(java.lang.String value)
                        throws SemanticException

  Sets the resource key of the help text of this data item.

  Parameters:
    `value` - the resource key of the help text
  Throws:
    `SemanticException` - if the property is locked.

### getResultSetExpression

    public java.lang.String getResultSetExpression()

  Looks the column name from the data binding element that is nearest to this data item. Iterate the column name expression list to see if there is a column name is equals with the value of the DataItemHandle.DATA_COLUMN_NAME_PROP on this data item. If yes, return the expression value.

  Returns:
    the expression value.
  Throws:
    `SemanticException`

### getResultSetColumn

    public java.lang.String getResultSetColumn()

  Gets the value of the result set column name property on this data item.

  Returns:
    the value of the property.

### setResultSetColumn

    public void setResultSetColumn(java.lang.String columnName)
                            throws SemanticException

  Sets the value of the column name property.

  Parameters:
    `columnName` - the value to set.
  Throws:
    `SemanticException`

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