VersionUtil (jackson-core 2.3.0-rc1)

java.lang.Object
- com.fasterxml.jackson.core.util.VersionUtil

```
public class VersionUtil
extends Object
```
Functionality for supporting exposing of component Versions. Also contains other misc methods that have no other place to live in.
Note that this class can be used in two roles: first, as a static utility class for loading purposes, and second, as a singleton loader of per-module version information.
Note that method for accessing version information changed between versions 2.1 and 2.2; earlier code used file named "VERSION.txt"; but this has serious performance issues on some platforms (Android), so a replacement system was implemented to use class generation and dynamic class loading.

Constructor Summary

Constructors
Modifier Constructor and Description

protected VersionUtil()

Constructors
Modifier	Constructor and Description
`protected`	`VersionUtil()`

Method Summary

Methods
Modifier and Type	Method and Description
`static Version`	`mavenVersionFor(ClassLoader classLoader, String groupId, String artifactId)` Will attempt to load the maven version for the given groupId and artifactId.
`static Version`	`packageVersionFor(Class<?> cls)` Loads version information by introspecting a class named "PackageVersion" in the same package as the given class.
`static Version`	`parseVersion(String versionStr, String groupId, String artifactId)`
`protected static int`	`parseVersionPart(String partStr)`
`static void`	`throwInternal()`
`Version`	`version()`
`static Version`	`versionFor(Class<?> cls)` Helper method that will try to load version information for specified class.

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

- Constructor Detail
  - VersionUtil
```
protected VersionUtil()
```
- Method Detail
  - version
```
public Version version()
```
  - versionFor
```
public static Version versionFor(Class<?> cls)
```
    Helper method that will try to load version information for specified class. Implementation is as follows: First, tries to load version info from a class named "PackageVersion" in the same package as the class. Next, if that fails, class loader that loaded specified class is asked to load resource with name "VERSION" from same location (package) as class itself had. If no version information is found, Version.unknownVersion() is returned.
  - packageVersionFor
```
public static Version packageVersionFor(Class<?> cls)
```
    Loads version information by introspecting a class named "PackageVersion" in the same package as the given class. If the class could not be found or does not have a public static Version field named "VERSION", returns null.
  - mavenVersionFor
```
public static Version mavenVersionFor(ClassLoader classLoader,
                      String groupId,
                      String artifactId)
```
    Will attempt to load the maven version for the given groupId and artifactId. Maven puts a pom.properties file in META-INF/maven/groupId/artifactId, containing the groupId, artifactId and version of the library.
    
    Parameters:
    classLoader - the ClassLoader to load the pom.properties file from
    groupId - the groupId of the library
    artifactId - the artifactId of the library
    
    Returns:
    The version
  - parseVersion
```
public static Version parseVersion(String versionStr,
                   String groupId,
                   String artifactId)
```
  - parseVersionPart
```
protected static int parseVersionPart(String partStr)
```
  - throwInternal
```
public static final void throwInternal()
```

Class VersionUtil

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

VersionUtil

Method Detail

version

versionFor

packageVersionFor

mavenVersionFor

parseVersion

parseVersionPart

throwInternal