org.eel.kitchen.jsonschema.util

Class RhinoHelper

java.lang.Object

org.eel.kitchen.jsonschema.util.RhinoHelper

public final class RhinoHelper
extends Object

ECMA 262 validation helper. Rhino is used instead of java.util.regex because the latter doesn't comply with ECMA 262:

• ECMA 262 doesn't have Pattern.DOTALL;
• ECMA 262 doesn't have "possessive" quantifiers (++, ?+, etc);
• there is only one word delimiter in ECMA 262, which is \b; \< (for beginning of word) and \> (for end of word) are not understood.

And many, many other things. See here for the full story. And if you don't yet have Jeffrey Friedl's "Mastering regular expressions", just buy it :p

Field Summary

Fields

Modifier and Type	Field and Description
private static org.mozilla.javascript.Context	ctx Script context to use
private static String	jsAsString JavaScript scriptlet defining functions regexIsValid and regMatch
private static org.mozilla.javascript.Function	regexIsValid Reference to Javascript function for regex validation
private static org.mozilla.javascript.Function	regMatch Reference to Javascript function for regex matching
private static org.mozilla.javascript.Scriptable	scope Script scope

Constructor Summary

Constructors

Modifier	Constructor and Description
private	RhinoHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	regexIsValid(String regex) Validate that a regex is correct
static boolean	regMatch(String regex, String input) Matches an input against a given regex, in the real sense of matching, that is, the regex can match anywhere in the input.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

jsAsString

private static final String jsAsString

JavaScript scriptlet defining functions regexIsValid and regMatch

See Also:

Constant Field Values

ctx

private static final org.mozilla.javascript.Context ctx

Script context to use

scope

private static final org.mozilla.javascript.Scriptable scope

Script scope

regexIsValid

private static final org.mozilla.javascript.Function regexIsValid

Reference to Javascript function for regex validation

regMatch

private static final org.mozilla.javascript.Function regMatch

Reference to Javascript function for regex matching

Constructor Detail

RhinoHelper

private RhinoHelper()

Method Detail

regexIsValid

public static boolean regexIsValid(String regex)

Validate that a regex is correct

Parameters:

regex - the regex to validate

Returns:

true if the regex is valid

regMatch

public static boolean regMatch(String regex,
               String input)

Matches an input against a given regex, in the real sense of matching, that is, the regex can match anywhere in the input. Java's java.util.regex makes the unfortunate mistake to make people believe that matching is done on the whole input... Which is not true.

Also note that the regex MUST have been validated at this point (using regexIsValid(String)).

Parameters:

regex - the regex to use

input - the input to match against (and again, see description)

Returns:

true if the regex matches the input