Package org.apache.felix.framework.cache

Class JarContent

  • All Implemented Interfaces:
    Content
    public class JarContent
extends java.lang.Object
implements Content

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()
      This method must be called when the content is no longer needed so that any resourses being used (e.g., open files) can be closed.
      protected void finalize()  
      java.util.Enumeration<java.lang.String> getEntries()
      Returns an enumeration of entry names as String objects.
      byte[] getEntryAsBytes​(java.lang.String name)
      This method returns the named entry as an array of bytes.
      Content getEntryAsContent​(java.lang.String entryName)
      This method returns the named entry as an IContent Typically, this method only makes sense for entries that correspond to some form of aggregated resource (e.g., an embedded JAR file or directory), but implementations are free to interpret this however makes sense.
      java.lang.String getEntryAsNativeLibrary​(java.lang.String entryName)
      This method returns the named entry as a file in the file system for use as a native library.
      java.io.InputStream getEntryAsStream​(java.lang.String name)
      This method returns the named entry as an input stream.
      java.net.URL getEntryAsURL​(java.lang.String name)
      This method allows retrieving an entry as a local URL.
      java.io.File getFile()  
      boolean hasEntry​(java.lang.String name)
      This method determines if the specified named entry is contained in the associated content.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

        clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Method Detail

      • finalize

        protected void finalize()
        Overrides:
        finalize in class java.lang.Object

      • close

        public void close()
        Description copied from interface: Content

        This method must be called when the content is no longer needed so that any resourses being used (e.g., open files) can be closed. Once this method is called, the content is no longer usable. If the content is already closed, then calls on this method should have no effect.

        Specified by:
        close in interface Content

      • hasEntry

        public boolean hasEntry​(java.lang.String name)
                 throws java.lang.IllegalStateException
        Description copied from interface: Content

        This method determines if the specified named entry is contained in the associated content. The entry name is a relative path with '/' separators.

        Specified by:
        hasEntry in interface Content
        Parameters:
        name - The name of the entry to find.
        Returns:
        true if a corresponding entry was found, false otherwise.
        Throws:
        java.lang.IllegalStateException

      • getEntries

        public java.util.Enumeration<java.lang.String> getEntries()
        Description copied from interface: Content

        Returns an enumeration of entry names as String objects. An entry name is a path constructed with '/' as path element separators and is relative to the root of the content. Entry names for entries that represent directories should end with the '/' character.

        Specified by:
        getEntries in interface Content

      • getEntryAsBytes

        public byte[] getEntryAsBytes​(java.lang.String name)
                       throws java.lang.IllegalStateException
        Description copied from interface: Content

        This method returns the named entry as an array of bytes.

        Specified by:
        getEntryAsBytes in interface Content
        Parameters:
        name - The name of the entry to retrieve as a byte array.
        Returns:
        An array of bytes if the corresponding entry was found, null otherwise.
        Throws:
        java.lang.IllegalStateException

      • getEntryAsStream

        public java.io.InputStream getEntryAsStream​(java.lang.String name)
                                     throws java.lang.IllegalStateException,
                                            java.io.IOException
        Description copied from interface: Content

        This method returns the named entry as an input stream.

        Specified by:
        getEntryAsStream in interface Content
        Parameters:
        name - The name of the entry to retrieve as an input stream.
        Returns:
        An input stream if the corresponding entry was found, null otherwise.
        Throws:
        java.lang.IllegalStateException
        java.io.IOException

      • getEntryAsURL

        public java.net.URL getEntryAsURL​(java.lang.String name)
        Description copied from interface: Content

        This method allows retrieving an entry as a local URL.

        Specified by:
        getEntryAsURL in interface Content
        Parameters:
        name - The name of the entry to retrieve as a URL
        Returns:
        A URL using a local protocol such as file, jar or null if not possible.

      • getEntryAsContent

        public Content getEntryAsContent​(java.lang.String entryName)
        Description copied from interface: Content

        This method returns the named entry as an IContent Typically, this method only makes sense for entries that correspond to some form of aggregated resource (e.g., an embedded JAR file or directory), but implementations are free to interpret this however makes sense. This method should return a new IContent instance for every invocation and the caller is responsible for opening and closing the returned content object.

        Specified by:
        getEntryAsContent in interface Content
        Parameters:
        entryName - The name of the entry to retrieve as an IContent.
        Returns:
        An IContent instance if a corresponding entry was found, null otherwise.

      • getEntryAsNativeLibrary

        public java.lang.String getEntryAsNativeLibrary​(java.lang.String entryName)
        Description copied from interface: Content

        This method returns the named entry as a file in the file system for use as a native library. It may not be possible for all content implementations (e.g., memory only) to implement this method, in which case it is acceptable to return null. Since native libraries can only be associated with a single class loader, this method should return a unique file per request.

        Specified by:
        getEntryAsNativeLibrary in interface Content
        Parameters:
        entryName - The name of the entry to retrieve as a file.
        Returns:
        A string corresponding to the absolute path of the file if a corresponding entry was found, null otherwise.

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • getFile

        public java.io.File getFile()