Package java.util.jar

Class Manifest

  • All Implemented Interfaces:
    Cloneable
    public class Manifest
extends Object
implements Cloneable
    The Manifest class is used to obtain attribute information for a JarFile and its entries.

    • Constructor Detail

      • Manifest

        public Manifest()
        Creates a new Manifest instance.

      • Manifest

        public Manifest​(InputStream is)
         throws IOException
        Creates a new Manifest instance using the attributes obtained from the input stream.
        Parameters:
        is - InputStream to parse for attributes.
        Throws:
        IOException - if an IO error occurs while creating this Manifest

      • Manifest

        public Manifest​(Manifest man)
        Creates a new Manifest instance. The new instance will have the same attributes as those found in the parameter Manifest.
        Parameters:
        man - Manifest instance to obtain attributes from.

    • Method Detail

      • clear

        public void clear()
        Resets the both the main attributes as well as the entry attributes associated with this Manifest.

      • getAttributes

        public Attributes getAttributes​(String name)
        Returns the Attributes associated with the parameter entry name.
        Parameters:
        name - the name of the entry to obtain Attributes from.
        Returns:
        the Attributes for the entry or null if the entry does not exist.

      • getEntries

        public Map<String,​Attributes> getEntries()
        Returns a map containing the Attributes for each entry in the Manifest.
        Returns:
        the map of entry attributes.

      • getMainAttributes

        public Attributes getMainAttributes()
        Returns the main Attributes of the JarFile.
        Returns:
        main Attributes associated with the source JarFile.

      • clone

        public Object clone()
        Creates a copy of this Manifest. The returned Manifest will equal the Manifest from which it was cloned.
        Overrides:
        clone in class Object
        Returns:
        a copy of this instance.

      • write

        public void write​(OutputStream os)
           throws IOException
        Writes this Manifest's name/attributes pairs to the given OutputStream. The MANIFEST_VERSION or SIGNATURE_VERSION attribute must be set before calling this method, or no attributes will be written.
        Throws:
        IOException - If an error occurs writing the Manifest.

      • read

        public void read​(InputStream is)
          throws IOException
        Merges name/attribute pairs read from the input stream is into this manifest.
        Parameters:
        is - The InputStream to read from.
        Throws:
        IOException - If an error occurs reading the manifest.

      • equals

        public boolean equals​(Object o)
        Determines if the receiver is equal to the parameter object. Two Manifests are equal if they have identical main attributes as well as identical entry attributes.
        Overrides:
        equals in class Object
        Parameters:
        o - the object to compare against.
        Returns:
        true if the manifests are equal, false otherwise
        See Also:
        Object.hashCode()