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

java.lang.Object
- com.im.df.api.dml.DFTerm

Direct Known Subclasses:

DFTermCount, DFTermExpression, DFTermField, DFTermValue
```
public abstract class DFTerm
extends java.lang.Object
```
This object is a superclass of all objects used for definition of expression terms for query execution in DIF.

Author:

Petr Hamernik

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract void`	`accept(DFTermVisitor visitor)`
`TermErrors`	`validate(DFDataTree dataTree)`	Validate the term.

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

- Method Detail
  - validate
```
public final TermErrors validate(DFDataTree dataTree)
```
    Validate the term.
    
    Parameters:
    
    dataTree - The parameter is optional (it means it can be null). If dataTree is specified the term is validated in context of the datatree otherwise (if null) it is supposed that the whole term is defined inside one DFEntity
    
    Returns:
    
    The result of validation. Never returns null.
  - accept
```
public abstract void accept(DFTermVisitor visitor)
```