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| <h2 title="Interface PathCapabilities" class="title">Interface PathCapabilities</h2> |
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| <pre>public interface <span class="typeNameLabel">PathCapabilities</span></pre> |
| <div class="block">The Path counterpoint to <a href="../../../../org/apache/hadoop/fs/StreamCapabilities.html" title="interface in org.apache.hadoop.fs"><code>StreamCapabilities</code></a>; a query to see if, |
| a FileSystem/FileContext instance has a specific capability under the given |
| path. |
| Other classes may also implement the interface, as desired. |
| |
| See <a href="../../../../org/apache/hadoop/fs/CommonPathCapabilities.html" title="class in org.apache.hadoop.fs"><code>CommonPathCapabilities</code></a> for the well-known capabilities.</div> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/fs/PathCapabilities.html#hasPathCapability-org.apache.hadoop.fs.Path-java.lang.String-">hasPathCapability</a></span>(<a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> path, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> capability)</code> |
| <div class="block">Probe for a specific capability under the given path.</div> |
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| <h4>hasPathCapability</h4> |
| <pre>boolean hasPathCapability(<a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> path, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> capability) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Probe for a specific capability under the given path. |
| If the function returns <code>true</code>, this instance is explicitly |
| declaring that the capability is available. |
| If the function returns <code>false</code>, it can mean one of: |
| <ul> |
| <li>The capability is not known.</li> |
| <li>The capability is known but it is not supported.</li> |
| <li>The capability is known but the filesystem does not know if it |
| is supported under the supplied path.</li> |
| </ul> |
| The core guarantee which a caller can rely on is: if the predicate |
| returns true, then the specific operation/behavior can be expected to be |
| supported. However a specific call may be rejected for permission reasons, |
| the actual file/directory not being present, or some other failure during |
| the attempted execution of the operation. |
| <p> |
| Implementors: <code>PathCapabilitiesSupport</code> |
| can be used to help implement this method.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>path</code> - path to query the capability of.</dd> |
| <dd><code>capability</code> - non-null, non-empty string to query the path for support.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the capability is supported under that part of the FS.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - this should not be raised, except on problems |
| resolving paths or relaying the call.</dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - invalid arguments</dd> |
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