Cmp (BaseX Core 10.3 API)

java.lang.Object
- org.basex.query.expr.ExprInfo
- - org.basex.query.expr.Expr
  - - org.basex.query.expr.ParseExpr
    - - org.basex.query.expr.Arr
      - org.basex.query.expr.Cmp

Direct Known Subclasses:

CmpG, CmpN, CmpV
```
public abstract class Cmp
extends Arr
```
Abstract comparison.

Author:

BaseX Team 2005-22, BSD License, Christian Gruen

Field Summary
- Fields inherited from class org.basex.query.expr.Arr
  exprs
- Fields inherited from class org.basex.query.expr.ParseExpr
  exprType, info

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract Expr`	`invert()`	If possible, returns an expression with inverted operands.
`Expr`	`invert(CompileContext cc)`	If possible, returns an optimized expression with inverted operands.
`abstract CmpG.OpG`	`opG()`	Returns the general comparator of the expression.
`abstract CmpV.OpV`	`opV()`	Returns the value comparator of the expression.

Methods inherited from class org.basex.query.expr.Arr
accept, allAreValues, args, checkUp, compile, copyAll, count, equals, exprSize, flatten, has, inline, inlineable, mayBePositional, removeEmpty, simplifyAll, toXml

Methods inherited from class org.basex.query.expr.ParseExpr
adoptType, atomValue, checkAllUp, checkNoEmpty, checkNoEmpty, checkNoneUp, checkNoUp, checkType, checkType, checkUp, copyType, ctxValue, data, ebv, info, item, iter, refineType, seqType, size, test, toArray, toArray, toAtomItem, toB64, toB64, toBin, toBin, toBoolean, toBoolean, toBytes, toBytes, toDouble, toDouble, toElem, toFloat, toFunction, toItem, toItem, toLong, toLong, toMap, toMap, toNode, toNode, toNodeOrNull, toNumber, toNumberOrNull, toQNm, toQNm, toString, toString, toStringOrNull, toToken, toToken, toTokenOrNull, toZeroToken, value

Methods inherited from class org.basex.query.expr.Expr
arg, atomItem, atomIter, copy, ddo, funcType, hasFreeVars, indexAccessible, isSimple, markTailCalls, mergeEbv, optimize, optimizePos, simplify, simplifyFor, typeCheck, uses, vacuous, visitAll

Methods inherited from class org.basex.query.expr.ExprInfo
description, toErrorString, toString, toString

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

- Method Detail
  - invert
```
public final Expr invert(CompileContext cc)
                  throws QueryException
```
    If possible, returns an optimized expression with inverted operands.
    
    Parameters:
    
    cc - compilation context
    
    Returns:
    
    original or modified expression
    
    Throws:
    
    QueryException - query exception
  - invert
```
public abstract Expr invert()
```
    If possible, returns an expression with inverted operands.
    
    Returns:
    
    original or null
  - opV
```
public abstract CmpV.OpV opV()
```
    Returns the value comparator of the expression.
    
    Returns:
    
    operator, or null for node comparisons
  - opG
```
public abstract CmpG.OpG opG()
```
    Returns the general comparator of the expression.
    
    Returns:
    
    operator, or null for node comparisons