org.apache.catalina.webresources

## Class JarWarResourceSet

- java.lang.Object
- - org.apache.catalina.util.LifecycleBase
  - - org.apache.catalina.webresources.AbstractResourceSet
    - - org.apache.catalina.webresources.AbstractArchiveResourceSet
      - - org.apache.catalina.webresources.JarWarResourceSet

- All Implemented Interfaces:
    Lifecycle, WebResourceSet

      public class JarWarResourceSet
      extends AbstractArchiveResourceSet

  Represents a `WebResourceSet` based on a JAR file that is nested inside a packed WAR file. This is only intended for internal use within Tomcat and therefore cannot be created via configuration.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle

      `Lifecycle.SingleUse`

  - ### Field Summary

    - ### Fields inherited from class org.apache.catalina.webresources.AbstractArchiveResourceSet

      `archiveEntries, archiveLock`

    - ### Fields inherited from class org.apache.catalina.webresources.AbstractResourceSet

      `sm`

    - ### Fields inherited from interface org.apache.catalina.Lifecycle

      `AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JarWarResourceSet(WebResourceRoot root, String webAppMount, String base, String archivePath, String internalPath)` Creates a new `WebResourceSet` based on a JAR file that is nested inside a WAR.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected WebResource` | `createArchiveResource(JarEntry jarEntry, String webAppPath, Manifest manifest)`
    `protected HashMap<String,JarEntry>` | `getArchiveEntries(boolean single)` Obtain the map of entries in the archive.
    `protected JarEntry` | `getArchiveEntry(String pathInArchive)` Obtain a single entry from the archive.
    `protected void` | `initInternal()`

    - ### Methods inherited from class org.apache.catalina.webresources.AbstractArchiveResourceSet

      `closeJarFile, gc, getBaseUrl, getBaseUrlString, getResource, isReadOnly, list, listWebAppPaths, mkdir, openJarFile, setBaseUrl, setReadOnly, write`

    - ### Methods inherited from class org.apache.catalina.webresources.AbstractResourceSet

      `checkPath, destroyInternal, getBase, getClassLoaderOnly, getInternalPath, getManifest, getRoot, getStaticOnly, getWebAppMount, setBase, setClassLoaderOnly, setInternalPath, setManifest, setRoot, setStaticOnly, setWebAppMount, startInternal, stopInternal`

    - ### Methods inherited from class org.apache.catalina.util.LifecycleBase

      `addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface org.apache.catalina.Lifecycle

      `addLifecycleListener, destroy, findLifecycleListeners, getState, getStateName, init, removeLifecycleListener, start, stop`

- - ### Constructor Detail

    - #### JarWarResourceSet

          public JarWarResourceSet(WebResourceRoot root,
                           String webAppMount,
                           String base,
                           String archivePath,
                           String internalPath)
                            throws IllegalArgumentException

      Creates a new `WebResourceSet` based on a JAR file that is nested inside a WAR.
      Parameters:
        `root` - The `WebResourceRoot` this new `WebResourceSet` will be added to.
        `webAppMount` - The path within the web application at which this `WebResourceSet` will be mounted.
        `base` - The absolute path to the WAR file on the file system in which the JAR is located.
        `archivePath` - The path within the WAR file where the JAR file is located.
        `internalPath` - The path within this new `WebResourceSet` where resources will be served from. E.g. for a resource JAR, this would be "META-INF/resources"
      Throws:
        `IllegalArgumentException` - if the webAppMount or internalPath is not valid (valid paths must start with '/')

  - ### Method Detail

    - #### createArchiveResource

          protected WebResource createArchiveResource(JarEntry jarEntry,
                                          String webAppPath,
                                          Manifest manifest)

      Specified by:
        `createArchiveResource` in class `AbstractArchiveResourceSet`

    - #### getArchiveEntries

          protected HashMap<String,JarEntry> getArchiveEntries(boolean single)

      Obtain the map of entries in the archive. May return null in which case `AbstractArchiveResourceSet.getArchiveEntry(String)` should be used.

      JarWar can't optimise for a single resource so the Map is always returned.

      Specified by:
        `getArchiveEntries` in class `AbstractArchiveResourceSet`
      Parameters:
        `single` - Is this request being make to support a single lookup? If false, a map will always be returned. If true, implementations may use this as a hint in determining the optimum way to respond.
      Returns:
        The archives entries mapped to their names or null if `AbstractArchiveResourceSet.getArchiveEntry(String)` should be used.

    - #### getArchiveEntry

          protected JarEntry getArchiveEntry(String pathInArchive)

      Obtain a single entry from the archive. For performance reasons, `AbstractArchiveResourceSet.getArchiveEntries(boolean)` should always be called first and the archive entry looked up in the map if one is returned. Only if that call returns null should this method be used.

      Should never be called since `getArchiveEntries(boolean)` always returns a Map.

      Specified by:
        `getArchiveEntry` in class `AbstractArchiveResourceSet`
      Parameters:
        `pathInArchive` - The path in the archive of the entry required
      Returns:
        The specified archive entry or null if it does not exist

    - #### initInternal

          protected void initInternal()
                               throws LifecycleException

      Specified by:
        `initInternal` in class `LifecycleBase`
      Throws:
        `LifecycleException`

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