content/release-doc/current/internals/org/apache/river/start/ClassLoaderUtil.html - river-site - Git at Google

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 <div class="subTitle">org.apache.river.start</div>
 <h2 title="Class ClassLoaderUtil" class="title">Class ClassLoaderUtil</h2>
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 <pre>public class <span class="typeNameLabel">ClassLoaderUtil</span>
 extends <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
 <div class="block">This class provides useful utilities for creating and
  manipulating class loaders.</div>
 <dl>
 <dt><span class="simpleTagLabel">Author:</span></dt>
 <dd>Sun Microsystems, Inc.</dd>
 </dl>
 </li>
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 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Field and Description</th>
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 <tr class="altColor">
 <td class="colFirst"><code>(package private) static <a href="http://docs.oracle.com/javase/6/docs/api/java/util/logging/Logger.html?is-external=true" title="class or interface in java.util.logging">Logger</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#logger">logger</a></span></code>
 <div class="block">Configure logger</div>
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 <td class="colFirst"><code>private </code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#ClassLoaderUtil--">ClassLoaderUtil</a></span>()</code>&nbsp;</td>
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 <td class="colFirst"><code>static void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#displayClassLoaderTree-java.lang.ClassLoader-">displayClassLoaderTree</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a>&nbsp;classloader)</code>
 <div class="block">Utility method that displays the class loader delegation tree for
  the given class loader.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>static void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#displayContextClassLoaderTree--">displayContextClassLoaderTree</a></span>()</code>
 <div class="block">Utility method that displays the class loader delegation tree for
  the current context class loader.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>private static <a href="http://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#getClassLoaderTree-java.lang.ClassLoader-">getClassLoaderTree</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a>&nbsp;classloader)</code>
 <div class="block">Utility method that retrieves the components making up the class loader
  delegation tree for the given <code>classloader</code> parameter and
  returns them via an <code>ArrayList</code>.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/6/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#getClasspathURLs-java.lang.String-">getClasspathURLs</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;classpath)</code>
 <div class="block">Utility method that converts the components of a <code>String</code>
  representing a classpath into file <code>URL</code>(s).</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/6/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#getCodebaseURLs-java.lang.String-">getCodebaseURLs</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;codebase)</code>
 <div class="block">Utility method that converts the components of a <code>String</code>
  representing a codebase into standard <code>URL</code>(s).</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>private static <a href="http://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#getContextClassLoaderTree--">getContextClassLoaderTree</a></span>()</code>
 <div class="block">Utility method that retrieves the components making up the class loader
  delegation tree for the current context class loader and returns each
  in an <code>ArrayList</code>.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/6/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/river/start/ClassLoaderUtil.html#getImportCodebaseURLs-java.lang.String-">getImportCodebaseURLs</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;importCodebase)</code>
 <div class="block">Utility method that converts the components of a <code>String</code>
  representing a codebase or classpath into <code>URL</code>(s).</div>
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 <pre>static final&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/util/logging/Logger.html?is-external=true" title="class or interface in java.util.logging">Logger</a> logger</pre>
 <div class="block">Configure logger</div>
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 <pre>private&nbsp;ClassLoaderUtil()</pre>
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 <pre>public static&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</a>[]&nbsp;getClasspathURLs(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;classpath)
                               throws <a href="http://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a>,
                                      <a href="http://docs.oracle.com/javase/6/docs/api/java/net/MalformedURLException.html?is-external=true" title="class or interface in java.net">MalformedURLException</a></pre>
 <div class="block">Utility method that converts the components of a <code>String</code>
  representing a classpath into file <code>URL</code>(s).</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>classpath</code> - <code>String</code> containing components separated
                   by path separators that represent the components
                   making up a classpath</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a <code>URL[]</code> where
          each element of the array corresponds to one of the components
          in the <code>classpath</code> parameter. The path components
          are (potentially) expanded via
          <code>File.getCanonicalFile()</code> before converting to a
          <code>URL</code> format.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/net/MalformedURLException.html?is-external=true" title="class or interface in java.net">MalformedURLException</a></code> - If the path cannot be parsed as a URL</dd>
 <dd><code>java.net.IOException</code> - If an I/O error occurs,
          which is possible because the construction of
          the canonical pathname may require filesystem queries</dd>
 <dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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 <pre>public static&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</a>[]&nbsp;getCodebaseURLs(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;codebase)
                              throws <a href="http://docs.oracle.com/javase/6/docs/api/java/net/MalformedURLException.html?is-external=true" title="class or interface in java.net">MalformedURLException</a></pre>
 <div class="block">Utility method that converts the components of a <code>String</code>
  representing a codebase into standard <code>URL</code>(s).</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>codebase</code> - <code>String</code> containing components separated
                   by spaces in which each component is in
                   <code>URL</code> format.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a <code>URL[]</code> where
          each element of the array corresponds to one of the components
          in the <code>codebase</code> parameter</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/net/MalformedURLException.html?is-external=true" title="class or interface in java.net">MalformedURLException</a></code></dd>
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 <pre>public static&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</a>[]&nbsp;getImportCodebaseURLs(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;importCodebase)
                                    throws <a href="http://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a>,
                                           <a href="http://docs.oracle.com/javase/6/docs/api/java/net/MalformedURLException.html?is-external=true" title="class or interface in java.net">MalformedURLException</a></pre>
 <div class="block">Utility method that converts the components of a <code>String</code>
  representing a codebase or classpath into <code>URL</code>(s).</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>importCodebase</code> - <code>String</code> assumed (in order) to be either
             1) a space delimited set of <code>URL</code>(s)
             representing a codebase or
             2) a <code>File.pathSeparator</code> delimited set
             of class paths.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a <code>URL[]</code> where
          each element of the array corresponds to one of the components
          in the <code>importCodebase</code> parameter</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/net/MalformedURLException.html?is-external=true" title="class or interface in java.net">MalformedURLException</a></code> - If the path cannot be parsed as a URL</dd>
 <dd><code>java.net.IOException</code> - If an I/O error occurs,
          which is possible because the construction of
          the canonical pathname may require filesystem queries</dd>
 <dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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 <h4>getContextClassLoaderTree</h4>
 <pre>private static&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a>&nbsp;getContextClassLoaderTree()</pre>
 <div class="block">Utility method that retrieves the components making up the class loader
  delegation tree for the current context class loader and returns each
  in an <code>ArrayList</code>.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>an <code>ArrayList</code> instance in which each element of the
          list is one of the components making up the current delegation
          tree.</dd>
 </dl>
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 <pre>private static&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</a>&nbsp;getClassLoaderTree(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a>&nbsp;classloader)</pre>
 <div class="block">Utility method that retrieves the components making up the class loader
  delegation tree for the given <code>classloader</code> parameter and
  returns them via an <code>ArrayList</code>.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>classloader</code> - <code>ClassLoader</code> instance whose delegation
                     tree is to be retrieved and returned</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>an <code>ArrayList</code> instance in which each element of the
          list is one of the components making up the delegation tree
          of the given class loader.</dd>
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 <pre>public static&nbsp;void&nbsp;displayContextClassLoaderTree()</pre>
 <div class="block">Utility method that displays the class loader delegation tree for
  the current context class loader. For each class loader in the tree,
  this method displays the locations from which that class loader
  will retrieve and load requested classes.
  <p>
  This method can be useful when debugging problems related to the
  receipt of exceptions such as <code>ClassNotFoundException</code>.</div>
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 <h4>displayClassLoaderTree</h4>
 <pre>public static&nbsp;void&nbsp;displayClassLoaderTree(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a>&nbsp;classloader)</pre>
 <div class="block">Utility method that displays the class loader delegation tree for
  the given class loader. For each class loader in the tree, this
  method displays the locations from which that class loader will
  retrieve and load requested classes.
  <p>
  This method can be useful when debugging problems related to the
  receipt of exceptions such as <code>ClassNotFoundException</code>.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>classloader</code> - <code>ClassLoader</code> instance whose delegation
                     tree is to be displayed</dd>
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