Classpath-aware schema client, pre-registered schemas & bugfixes

Improvements:

• built-in SchemaClient implementation for using resources on the classpath
• using maven-source-plugin and maven-javadoc-plugin - contributed by @jklukas
• adding SchemaException#toJSON()
• pre-defining schemas by their arbitary URIs before loading via SchemaLoaderBuilder#registerSchemaByURI() (requested in #38 and #212)

Bugfixes:

• correcting schema location of ReferenceSchemas (reported in #233 )
• fixing Schema#toString() calls throwing an exception when the schema has a "title" or "description"
• fixing a bug causing remote-loaded schemas to loose their origins as context "$id"s - reported in #260
• fixing remote schemas not taking into account some loader settings (regexFactory and useDefaults)

Android compatibility & ValidationListener

Improvements:

• fixing android compatibility
• adding ValidationListener support - requested in #237
• tracking unprocessed schema properties (returned by Schema#getUnprocessedProperties()) - requested in #241
• using japicmp instead of semver enforcer to verify API backward compatibility

Maintenance release

This release comes with a couple of improvements and bugfixes to make the library easier to use, there is no new big feature introduced.

Improvements:

• dependency version cleanup & removing guava - contributed by @snazarenko67
• EnumSchema now keeps the order of possible values as they were listed in the schema JSON - contributed by @cyqw
• schema loading: using the explicitly set spec version when loading schemas which have a "$schema" value but it doesn't point to any supported specification versions
• adding some type checking of subject under validation

Bugfixes:

• avoiding possible NPE in ValidationException#hashCode()
• properly handling Number subtypes in "number" keyword validation (AtomicLong, AtomicInteger, BigDecimal and BigInteger) - fixed by @EXPEaneparaczki
• typo fixes in the readme - contributed by @0xflotus

Using configured RegExp implementation in patternProperties

Bugfix:

• updating "patternProperties" handling to use the configured regexp implementation instead of hard-coded RE2J

Improved RegEx support

Improvements:

• configurable RegExp implementations (java.util.regex or RE2J) (regression reported in #156 )

Bugfixes:

• fixing bug related to "format" handling in referred schemas (reported in #160)
• properly handling "$schema" values in root documents of referred schemas (reported in #164)
• fixing exception thrown for unrecognized "$schema" values (reported in #170)
• fixing missing SchemaException#schemaLocation property when an unrecognized "type" value is found (reported in #168)
• fixing "$ref" resolution for json pointers which' document-relative part is the same but they point to different schema documents
• fixing a long-standing problem of keywords belonging to separate schema classes being used in the same schema json object (reported in #184 , #174 , #116 , #87 and maybe more)

Draft 7 support

This is a fairly big release, coming with support of the Draft-07 version of the JSON Schema Core and Validation specifications.

Special thanks for @zgyorffi for his contribution to this release.

Improvements

• supporting JSON Schema Draft 07
• improving regular expression performance by using re2j - thanks for @rkeytacked

Bugfixes

• fixing custom format handling in schemas referring to external schemas - reported in #152 , fixed by @hansmire
• fixing a bug related to the validation of combined schemas in early failure mode

Default values and early failing mode

Improvements

• supporting the "default" keyword
• adding an early-failing validation mode

Bugfixes

• fixing null handling as a possible enum value - reported in #126
• fixing regression in "uri" format validation in draft-v4 mode, thanks for @lmontrieux for the bugfix
• fixing ConstSchema#toString() implementation - reported in #138

Numbers, numbers

This is a maintenance release, the library got much better in terms of numbers:

• fixed collecting all schema violations while validating against number schemas, contributed by @adyach in #118
• massive validation performance improvements carried out by @lmontrieux in #119

JSON Schema Draft 6 support

Improvements

• implementing JSON Schema Draft 6
• tracking schema location and including it in SchemaExceptions
• including violated sub-schema location in ValidationException instances - requested in #51 and #93

Bugfixes

• removing invalid "type":"enum" property while printing EnumSchema instances - reported in #87
• fixing NPE while processing empty "dependencies" object - reported in #85

Maintenance release

This is a small bugfix release fixing the following problems:

• maxItems error message was incorrectly generated - reported in #78
• replacing integration test for issue #25 with a new testcase not affected by Creative Commons License - requested in #80