## org.apache.tools.ant.taskdefs.optional.extension
Class Specification

    java.lang.Object
      org.apache.tools.ant.taskdefs.optional.extension.Specification

    public final class Specification

extends java.lang.Object

Utility class that represents either an available "Optional Package" (formerly known as "Standard Extension") as described in the manifest of a JAR file, or the requirement for such an optional package.

For more information about optional packages, see the document Optional Package Versioning in the documentation bundle for your Java2 Standard Edition package, in file `guide/extensions/versioning.html`.

Field Summary
`static Compatibility` `COMPATIBLE` Enum indicating that extension is compatible with other Package Specification.
`static java.util.jar.Attributes.Name` `IMPLEMENTATION_TITLE` Manifest Attribute Name object for IMPLEMENTATION_TITLE.
`static java.util.jar.Attributes.Name` `IMPLEMENTATION_VENDOR` Manifest Attribute Name object for IMPLEMENTATION_VENDOR.
`static java.util.jar.Attributes.Name` `IMPLEMENTATION_VERSION` Manifest Attribute Name object for IMPLEMENTATION_VERSION.
`static Compatibility` `INCOMPATIBLE` This enum indicates that an extension is incompatible with other Package Specification in ways other than other enums indicate.
`static Compatibility` `REQUIRE_IMPLEMENTATION_CHANGE` Enum indicating that extension requires an upgrade of implementation to be compatible with other Package Specification.
`static Compatibility` `REQUIRE_SPECIFICATION_UPGRADE` Enum indicating that extension requires an upgrade of specification to be compatible with other Package Specification.
`static Compatibility` `REQUIRE_VENDOR_SWITCH` Enum indicating that extension requires a vendor switch to be compatible with other Package Specification.
`static java.util.jar.Attributes.Name` `SPECIFICATION_TITLE` Manifest Attribute Name object for SPECIFICATION_TITLE.
`static java.util.jar.Attributes.Name` `SPECIFICATION_VENDOR` Manifest Attribute Name object for SPECIFICATION_VENDOR.
`static java.util.jar.Attributes.Name` `SPECIFICATION_VERSION` Manifest Attribute Name object for SPECIFICATION_VERSION.

Constructor Summary
`Specification(java.lang.String specificationTitle, java.lang.String specificationVersion, java.lang.String specificationVendor, java.lang.String implementationTitle, java.lang.String implementationVersion, java.lang.String implementationVendor)` The constructor to create Package Specification object.
`Specification(java.lang.String specificationTitle, java.lang.String specificationVersion, java.lang.String specificationVendor, java.lang.String implementationTitle, java.lang.String implementationVersion, java.lang.String implementationVendor, java.lang.String[] sections)` The constructor to create Package Specification object.

Method Summary
`Compatibility` `getCompatibilityWith(Specification other)` Return a Compatibility enum indicating the relationship of this `Package Specification` with the specified `Extension`.
`java.lang.String` `getImplementationTitle()` Get the title of the specification.
`java.lang.String` `getImplementationVendor()` Get the vendor of the extensions implementation.
`java.lang.String` `getImplementationVersion()` Get the version of the implementation.
`java.lang.String[]` `getSections()` Return an array containing sections to which specification applies or null if relevent to no sections.
`static Specification[]` `getSpecifications(java.util.jar.Manifest manifest)` Return an array of `Package Specification` objects.
`java.lang.String` `getSpecificationTitle()` Get the title of the specification.
`java.lang.String` `getSpecificationVendor()` Get the vendor of the specification.
`DeweyDecimal` `getSpecificationVersion()` Get the version of the specification.
`boolean` `isCompatibleWith(Specification other)` Return `true` if the specified `package` is satisfied by this `Specification`.
`java.lang.String` `toString()` Return a String representation of this object.

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

Field Detail

### SPECIFICATION_TITLE

    public static final java.util.jar.Attributes.Name SPECIFICATION_TITLE

  Manifest Attribute Name object for SPECIFICATION_TITLE.

### SPECIFICATION_VERSION

    public static final java.util.jar.Attributes.Name SPECIFICATION_VERSION

  Manifest Attribute Name object for SPECIFICATION_VERSION.

### SPECIFICATION_VENDOR

    public static final java.util.jar.Attributes.Name SPECIFICATION_VENDOR

  Manifest Attribute Name object for SPECIFICATION_VENDOR.

### IMPLEMENTATION_TITLE

    public static final java.util.jar.Attributes.Name IMPLEMENTATION_TITLE

  Manifest Attribute Name object for IMPLEMENTATION_TITLE.

### IMPLEMENTATION_VERSION

    public static final java.util.jar.Attributes.Name IMPLEMENTATION_VERSION

  Manifest Attribute Name object for IMPLEMENTATION_VERSION.

### IMPLEMENTATION_VENDOR

    public static final java.util.jar.Attributes.Name IMPLEMENTATION_VENDOR

  Manifest Attribute Name object for IMPLEMENTATION_VENDOR.

### COMPATIBLE

    public static final Compatibility COMPATIBLE

  Enum indicating that extension is compatible with other Package Specification.

### REQUIRE_SPECIFICATION_UPGRADE

    public static final Compatibility REQUIRE_SPECIFICATION_UPGRADE

  Enum indicating that extension requires an upgrade of specification to be compatible with other Package Specification.

### REQUIRE_VENDOR_SWITCH

    public static final Compatibility REQUIRE_VENDOR_SWITCH

  Enum indicating that extension requires a vendor switch to be compatible with other Package Specification.

### REQUIRE_IMPLEMENTATION_CHANGE

    public static final Compatibility REQUIRE_IMPLEMENTATION_CHANGE

  Enum indicating that extension requires an upgrade of implementation to be compatible with other Package Specification.

### INCOMPATIBLE

    public static final Compatibility INCOMPATIBLE

  This enum indicates that an extension is incompatible with other Package Specification in ways other than other enums indicate. For example, the other Package Specification may have a different ID.

Constructor Detail

### Specification

    public Specification(java.lang.String specificationTitle,
                         java.lang.String specificationVersion,
                         java.lang.String specificationVendor,
                         java.lang.String implementationTitle,
                         java.lang.String implementationVersion,
                         java.lang.String implementationVendor)

  The constructor to create Package Specification object. Note that every component is allowed to be specified but only the specificationTitle is mandatory.

  Parameters:
    `specificationTitle` - the name of specification.
    `specificationVersion` - the specification Version.
    `specificationVendor` - the specification Vendor.
    `implementationTitle` - the title of implementation.
    `implementationVersion` - the implementation Version.
    `implementationVendor` - the implementation Vendor.

### Specification

    public Specification(java.lang.String specificationTitle,
                         java.lang.String specificationVersion,
                         java.lang.String specificationVendor,
                         java.lang.String implementationTitle,
                         java.lang.String implementationVersion,
                         java.lang.String implementationVendor,
                         java.lang.String[] sections)

  The constructor to create Package Specification object. Note that every component is allowed to be specified but only the specificationTitle is mandatory.

  Parameters:
    `specificationTitle` - the name of specification.
    `specificationVersion` - the specification Version.
    `specificationVendor` - the specification Vendor.
    `implementationTitle` - the title of implementation.
    `implementationVersion` - the implementation Version.
    `implementationVendor` - the implementation Vendor.
    `sections` - the sections/packages that Specification applies to.

Method Detail

### getSpecifications

    public static Specification[] getSpecifications(java.util.jar.Manifest manifest)
                                             throws java.text.ParseException

  Return an array of `Package Specification` objects. If there are no such optional packages, a zero-length array is returned.

  Parameters:
    `manifest` - Manifest to be parsed
  Returns:
    the Package Specifications extensions in specified manifest
  Throws:
    `java.text.ParseException` - if the attributes of the specifications cannot be parsed according to their expected formats.

### getSpecificationTitle

    public java.lang.String getSpecificationTitle()

  Get the title of the specification.

  Returns:
    the title of speciication

### getSpecificationVendor

    public java.lang.String getSpecificationVendor()

  Get the vendor of the specification.

  Returns:
    the vendor of the specification.

### getImplementationTitle

    public java.lang.String getImplementationTitle()

  Get the title of the specification.

  Returns:
    the title of the specification.

### getSpecificationVersion

    public DeweyDecimal getSpecificationVersion()

  Get the version of the specification.

  Returns:
    the version of the specification.

### getImplementationVendor

    public java.lang.String getImplementationVendor()

  Get the vendor of the extensions implementation.

  Returns:
    the vendor of the extensions implementation.

### getImplementationVersion

    public java.lang.String getImplementationVersion()

  Get the version of the implementation.

  Returns:
    the version of the implementation.

### getSections

    public java.lang.String[] getSections()

  Return an array containing sections to which specification applies or null if relevent to no sections.

  Returns:
    an array containing sections to which specification applies or null if relevent to no sections.

### getCompatibilityWith

    public Compatibility getCompatibilityWith(Specification other)

  Return a Compatibility enum indicating the relationship of this `Package Specification` with the specified `Extension`.

  Parameters:
    `other` - the other specification
  Returns:
    the enum indicating the compatibility (or lack thereof) of specifed Package Specification

### isCompatibleWith

    public boolean isCompatibleWith(Specification other)

  Return `true` if the specified `package` is satisfied by this `Specification`. Otherwise, return `false`.

  Parameters:
    `other` - the specification
  Returns:
    true if the specification is compatible with this specification

### toString

    public java.lang.String toString()

  Return a String representation of this object.

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    string representation of object.