# FunError
Keywords: org.exist.xquery.functions.FunError class

## org.exist.xquery.functions
Class FunError

    java.lang.Object
      org.exist.xquery.AbstractExpression
          org.exist.xquery.PathExpr
              org.exist.xquery.Function
                  org.exist.xquery.BasicFunction
                      org.exist.xquery.functions.FunError

All Implemented Interfaces:
  CompiledExpression, CompiledXQuery, Expression

public class FunError
extends BasicFunction

Field Summary
`static QName` `DEFAULT_ERR`
`static FunctionSignature[]` `signature`

Fields inherited from class org.exist.xquery.Function
`BUILTIN_FUNCTION_NS`

Fields inherited from interface org.exist.xquery.Expression
`DOT_TEST, EXPRESSION_ID_INVALID, IGNORE_CONTEXT, IN_PREDICATE, IN_UPDATE, IN_WHERE_CLAUSE, NO_CONTEXT_ID, SINGLE_STEP_EXECUTION`

Constructor Summary
`FunError(XQueryContext context, FunctionSignature signature)`

Method Summary
`Sequence` `eval(Sequence[] args, Sequence contextSequence)` Process the function.
`int` `returnsType()` The static return type of the expression.

Methods inherited from class org.exist.xquery.BasicFunction
`eval`

Methods inherited from class org.exist.xquery.Function
`analyze, createFunction, dump, getArgument, getArgumentCount, getArguments, getASTNode, getCardinality, getDependencies, getName, getParent, getSignature, isCalledAs, setArguments, setASTNode, setParent, setPrimaryAxis, toString`

Methods inherited from class org.exist.xquery.PathExpr
`accept, add, add, addPath, addPredicate, dump, getContext, getDocumentSet, getExpression, getLastExpression, getLength, getLiteralValue, getSource, isValid, replaceLastExpression, reset, resetState, setContext, setSource`

Methods inherited from class org.exist.xquery.AbstractExpression
`eval, getContextDocSet, getContextId, getExpressionId, setContextDocSet`

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

Methods inherited from interface org.exist.xquery.CompiledXQuery
`eval`

Field Detail

### signature

    public static final FunctionSignature[] signature

### DEFAULT_ERR

    public static final QName DEFAULT_ERR

Constructor Detail

### FunError

    public FunError(XQueryContext context,
                    FunctionSignature signature)

Method Detail

### returnsType

    public int returnsType()

  Description copied from interface: `Expression`
  The static return type of the expression. This method should return one of the type constants defined in class `Type`. If the return type cannot be determined statically, return Type.ITEM.

  Specified by:
    `returnsType` in interface `Expression`
  Overrides:
    `returnsType` in class `Function`

### eval

    public Sequence eval(Sequence[] args,
                         Sequence contextSequence)
                  throws XPathException

  Description copied from class: `BasicFunction`
  Process the function. All arguments are passed in the array args. The number of arguments, their type and cardinality have already been checked to match the function signature.

  Specified by:
    `eval` in class `BasicFunction`
  Parameters:
    `args` -
    `contextSequence` -
  Throws:
    `XPathException`

Copyright (C) Wolfgang Meier. All rights reserved.