DFQuery (com.chemaxon.plexus.core:plexus-dif-api)

All Superinterfaces:

DFItem, DFUserItem, PropertiesEditingConfigurable
```
public interface DFQuery
extends DFUserItem
```
Persistent query definition in the system.

Author:

Petr Hamernik

Nested Class Summary
- Nested classes/interfaces inherited from interface com.im.df.api.ddl.DFItem
  DFItem.Handle<T extends DFItem>
- Nested classes/interfaces inherited from interface com.im.df.api.support.PropertiesEditingConfigurable
  PropertiesEditingConfigurable.Extra

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String PROP_EXPRESSION
- Fields inherited from interface com.im.df.api.ddl.DFItem
  PROP_CAPABILITIES, PROP_DESCRIPTION, PROP_ID, PROP_NAME, PROP_TYPE, PROP_VALID

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`DFDataTree`	`getDataTree()`	Get the owner datatree.
`DFTermExpression`	`getExpression()`	Get the current expression of this query
`DFItem.Handle<DFQuery>`	`getHandle()`	Returns a handle to the Item.
`void`	`setExpression(DFTermExpression expression, com.im.commons.progress.DFEnvironmentRW env)`	Set new expression value.

Methods inherited from interface com.im.df.api.ddl.DFItem
addPropertyChangeListener, getCapabilities, getDescription, getId, getName, getType, isValid, removePropertyChangeListener, setDescription, setName

Methods inherited from interface com.im.df.api.support.PropertiesEditingConfigurable
isPropertyEditable

- Field Detail
  - PROP_EXPRESSION
```
static final java.lang.String PROP_EXPRESSION
```
    See Also:
    
    Constant Field Values
- Method Detail
  - getDataTree
```
DFDataTree getDataTree()
```
    Get the owner datatree.
    
    Returns:
    
    Datatree which this query belongs to
  - getExpression
```
DFTermExpression getExpression()
```
    Get the current expression of this query
    
    Returns:
    
    The expression
  - setExpression
```
void setExpression(DFTermExpression expression,
                   com.im.commons.progress.DFEnvironmentRW env)
```
    Set new expression value.
    
    Parameters:
    
    expression - New expression to be stored
    
    env - Environment with the appropriate lock
  - getHandle
```
DFItem.Handle<DFQuery> getHandle()
```
    Description copied from interface: DFItem
    
    Returns a handle to the Item. The handle uniquely identifies the Item, even though the schema data may be copied or otherwise replicated. Use the Handle instead of DFItem.getId() when registering an Item in collections that extend beyond the DFItem's parent Schema.
    
    Specified by:
    
    getHandle in interface DFItem
    
    Returns:
    
    The handle to the DFItem.