JSONValidation (JSON Validation 2.0 API)

java.lang.Object
- net.pwall.json.validation.JSONValidation

```
public class JSONValidation
extends Object
```
Static functions to perform data validations, principally for JSON Schema format validation.
The original requirements are taken from the JSON Schema Validation specification.

There are also additional validations for two unofficial types local-date-time and local-time; these allow for validation of date-time or time strings that do not include time zone information.

Also included are isLeapYear(int) and monthLength(int, int) functions; these are required for date checking and it costs nothing to make them available for general use.

Author:

Peter Wall

Field Summary

Fields
Modifier and Type Field and Description

static Map<String,Predicate<String>> validations
Table of implemented validations.

Fields
Modifier and Type	Field and Description
`static Map<String,Predicate<String>>`	`validations` Table of implemented validations.

Constructor Summary

Constructors
Constructor and Description

JSONValidation()

Constructors
Constructor and Description
`JSONValidation()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static boolean`	`isDate(CharSequence string)` Test for conformity to the `date` format type.
`static boolean`	`isDateTime(CharSequence string)` Test for conformity to the `date-time` format type.
`static boolean`	`isDuration(CharSequence string)` Test for conformity to the `duration` format type.
`static boolean`	`isEmail(CharSequence string)` Test for conformity to the `email` format type.
`static boolean`	`isHostname(CharSequence string)` Test for conformity to the `hostname` format type.
`static boolean`	`isIPV4(CharSequence string)` Test for conformity to the `ipv4` format type.
`static boolean`	`isIPV6(CharSequence string)` Test for conformity to the `ipv6` format type.
`static boolean`	`isJSONPointer(CharSequence string)` Test for conformity to the `json-pointer` format type.
`static boolean`	`isLeapYear(int year)` Determine whether a given year is a leap year (only meaningful for years covered by the Gregorian calendar).
`static boolean`	`isLocalDateTime(CharSequence string)` Test for conformity to an unofficial `local-date-time` type (not part of the JSON Schema Validation Specification).
`static boolean`	`isLocalTime(CharSequence string)` Test for conformity to an unofficial `local-time` type (not part of the JSON Schema Validation Specification).
`static boolean`	`isRegex(CharSequence string)` Test for conformity to the `regex` format type.
`static boolean`	`isRelativeJSONPointer(CharSequence string)` Test for conformity to the `relative-json-pointer` format type.
`static boolean`	`isTime(CharSequence string)` Test for conformity to the `time` format type.
`static boolean`	`isURI(CharSequence string)` Test for conformity to the `uri` format type.
`static boolean`	`isURIReference(CharSequence string)` Test for conformity to the `uri-reference` format type.
`static boolean`	`isURITemplate(CharSequence string)` Test for conformity to the `uri-template` format type.
`static boolean`	`isUUID(CharSequence string)` Test for conformity to the `uuid` format type.
`static int`	`monthLength(int year, int month)` Calculate the length of a given month (only meaningful for years covered by the Gregorian calendar).

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

- Field Detail
  - validations
```
public static Map<String,Predicate<String>> validations
```
    Table of implemented validations.
- Constructor Detail
  - JSONValidation
```
public JSONValidation()
```
- Method Detail
  - isLeapYear
```
public static boolean isLeapYear(int year)
```
    Determine whether a given year is a leap year (only meaningful for years covered by the Gregorian calendar).
    
    Parameters:
    
    year - the year
    
    Returns:
    
    true if the year is a leap year
  - monthLength
```
public static int monthLength(int year,
                              int month)
```
    Calculate the length of a given month (only meaningful for years covered by the Gregorian calendar).
    
    Parameters:
    
    year - the year
    
    month - the month (must be in the range 1 to 12)
    
    Returns:
    
    the length of the month in days
    
    Throws:
    
    IllegalArgumentException - if the month is not in the range 1 to 12
  - isDateTime
```
public static boolean isDateTime(CharSequence string)
```
    Test for conformity to the date-time format type. A string is valid if it conforms to the date-time production in RFC 3339, section 5.6.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isLocalDateTime
```
public static boolean isLocalDateTime(CharSequence string)
```
    Test for conformity to an unofficial local-date-time type (not part of the JSON Schema Validation Specification). A string is valid if it conforms to a new production [full-date "T" partial-time] based on RFC 3339, section 5.6.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isDate
```
public static boolean isDate(CharSequence string)
```
    Test for conformity to the date format type. A string is valid if it conforms to the full-date production in RFC 3339, section 5.6.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isTime
```
public static boolean isTime(CharSequence string)
```
    Test for conformity to the time format type. A string is valid if it conforms to the full-time production in RFC 3339, section 5.6.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isLocalTime
```
public static boolean isLocalTime(CharSequence string)
```
    Test for conformity to an unofficial local-time type (not part of the JSON Schema Validation Specification). A string is valid if it conforms to the partial-time production in RFC 3339, section 5.6.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isDuration
```
public static boolean isDuration(CharSequence string)
```
    Test for conformity to the duration format type. A string is valid if it conforms to the duration production in RFC 3339, Appendix A.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isURI
```
public static boolean isURI(CharSequence string)
```
    Test for conformity to the uri format type. A string is valid if it conforms to RFC 3986.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isURIReference
```
public static boolean isURIReference(CharSequence string)
```
    Test for conformity to the uri-reference format type. A string is valid if it conforms to RFC 3986 (either a URI or a relative-reference).
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isURITemplate
```
public static boolean isURITemplate(CharSequence string)
```
    Test for conformity to the uri-template format type. A string is valid if it conforms to RFC 6570.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isUUID
```
public static boolean isUUID(CharSequence string)
```
    Test for conformity to the uuid format type. A string is valid if it conforms to RFC 4122.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isHostname
```
public static boolean isHostname(CharSequence string)
```
    Test for conformity to the hostname format type. A string is valid if it conforms to RFC 1123, section 2.1.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isEmail
```
public static boolean isEmail(CharSequence string)
```
    Test for conformity to the email format type.
    Validation of email addresses is difficult, largely because the specification in RFC 5322 makes reference to earlier “obsolete” forms of email addresses that are expected to be accepted as valid. This function does not attempt to cover the entire range of obsolete addresses; instead, it implements a form of validation derived from the regular expression at the web site emailregex.com for the “local-part” (the addressee or mailbox name), and it uses the hostname validation from RFC 1123 for the “domain”.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isIPV4
```
public static boolean isIPV4(CharSequence string)
```
    Test for conformity to the ipv4 format type. A string is valid if it conforms to RFC 2673, section 3.2.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isIPV6
```
public static boolean isIPV6(CharSequence string)
```
    Test for conformity to the ipv6 format type. A string is valid if it conforms to RFC 4291, section 2.2.
    NOTE: The JSON Schema Validation specification says (§ 7.3.4) that a string conforming to the ipv6 format must be an “IPv6 address as defined in RFC 4291, section 2.2”. Subsequent to RFC 4291, RFC 5952 recommended tighter restrictions on the representation of IPV6 addresses, including mandating the use of lower case for all alpha characters, and prohibiting the use of “::” to compress a single zero 16-bit field. Because the JSON Schema Validation specification refers only to RFC 4291, not RFC 5952, this function does not implement the tighter restrictions of the later document.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isJSONPointer
```
public static boolean isJSONPointer(CharSequence string)
```
    Test for conformity to the json-pointer format type. A string is valid if it conforms to RFC 6901, section 5.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isRelativeJSONPointer
```
public static boolean isRelativeJSONPointer(CharSequence string)
```
    Test for conformity to the relative-json-pointer format type. A string is valid if it conforms to Relative JSON Pointers.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct
  - isRegex
```
public static boolean isRegex(CharSequence string)
```
    Test for conformity to the regex format type. A string is valid if it conforms to the ECMA 262 regular expression dialect.
    Since the Java Pattern class used here implements a dialect very close to, but not identical to the ECMA 262 variant, it is possible that in rare cases there may be subtle inconsistencies in the results of this function.
    
    Parameters:
    
    string - the string to be tested
    
    Returns:
    
    true if the string is correct

Class JSONValidation

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

validations

Constructor Detail

JSONValidation

Method Detail

isLeapYear

monthLength

isDateTime

isLocalDateTime

isDate

isTime

isLocalTime

isDuration

isURI

isURIReference

isURITemplate

isUUID

isHostname

isEmail

isIPV4

isIPV6

isJSONPointer

isRelativeJSONPointer

isRegex