# ResolveURI
Keywords: net.sf.saxon.functions.ResolveURI class

## net.sf.saxon.functions
Class ResolveURI

    java.lang.Object
      net.sf.saxon.expr.Expression
          net.sf.saxon.expr.FunctionCall
              net.sf.saxon.functions.SystemFunction
                  net.sf.saxon.functions.ResolveURI

All Implemented Interfaces:
  Serializable, SourceLocator, Container, EvaluableItem, SequenceIterable, InstructionInfoProvider

    public class ResolveURI

extends SystemFunction

This class supports the resolve-uri() functions in XPath 2.0

See Also:
  Serialized Form

Field Summary

Fields inherited from class net.sf.saxon.expr.Expression
`EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD`

Constructor Summary
`ResolveURI()`

Method Summary
`void` `checkArguments(StaticContext env)` Method called during static type checking
`static String` `escapeSpaces(String s)` Replace spaces by %20
`Item` `evaluateItem(XPathContext context)` Evaluate the function at run-time
`String` `getStaticBaseURI()` Get the static base URI of the expression
`static String` `tryToExpand(String systemId)` If a system ID can't be parsed as a URL, try to expand it as a relative URI using the current directory as the base URI.

Methods inherited from class net.sf.saxon.functions.SystemFunction
`computeCardinality, computeSpecialProperties, display, getDetails, getErrorCodeForTypeErrors, getItemType, main, makeSystemFunction, optimize, setDetails`

Methods inherited from class net.sf.saxon.expr.FunctionCall
`getArguments, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, preEvaluate, promote, replaceSubExpression, setArguments, setFunctionNameCode, simplify, typeCheck`

Methods inherited from class net.sf.saxon.expr.Expression

`adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, effectiveBooleanValue, evaluateAsString, getCardinality, getColumnNumber, getContainingProcedure, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getInstructionInfo, getIntrinsicDependencies, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, iterate, markTailFunctionCalls, process, resetStaticProperties, setLocationId, setParentExpression, setParentExpression, suppressValidation`

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

Constructor Detail

### ResolveURI

    public ResolveURI()

Method Detail

### checkArguments

    public void checkArguments(StaticContext env)
                        throws XPathException

  Description copied from class: `SystemFunction`
  Method called during static type checking

  Overrides:
    `checkArguments` in class `SystemFunction`
  Throws:
    `XPathException`

### getStaticBaseURI

    public String getStaticBaseURI()

  Get the static base URI of the expression

### evaluateItem

    public Item evaluateItem(XPathContext context)
                      throws XPathException

  Evaluate the function at run-time

  Specified by:
    `evaluateItem` in interface `EvaluableItem`
  Overrides:
    `evaluateItem` in class `Expression`
  Parameters:
    `context` - The context in which the expression is to be evaluated
  Returns:
    the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
  Throws:
    `XPathException` - if any dynamic error occurs evaluating the expression

### tryToExpand

    public static String tryToExpand(String systemId)

  If a system ID can't be parsed as a URL, try to expand it as a relative URI using the current directory as the base URI.

### escapeSpaces

    public static String escapeSpaces(String s)

  Replace spaces by %20

Copyright (C) Michael H. Kay. All rights reserved.