api/jdk16/openj9.dtfj/com/ibm/dtfj/utils/file/FileSniffer.html - gerrit/www.eclipse.org/openj9/docs - Git at Google

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 <div class="sub-title"><span class="module-label-in-type">Module</span>&nbsp;<a href="../../../../../module-summary.html">openj9.dtfj</a></div>
 <div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">com.ibm.dtfj.utils.file</a></div>
 <h1 title="Class FileSniffer" class="title">Class FileSniffer</h1>
 </div>
 <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link" target="_blank">java.lang.Object</a>
 <div class="inheritance">com.ibm.dtfj.utils.file.FileSniffer</div>
 </div>
 <section class="description">
 <hr>
 <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">FileSniffer</span>
 <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link" target="_blank">Object</a></span></div>
 <div class="block">Sniffs files attempting to determine the contents, typically from known
  magic numbers/values.</div>
 </section>
 <section class="summary">
 <ul class="summary-list">
 <!-- ======== NESTED CLASS SUMMARY ======== -->
 <li>
 <section class="nested-class-summary" id="nested.class.summary">
 <h2>Nested Class Summary</h2>
 <div class="caption"><span>Nested Classes</span></div>
 <div class="summary-table three-column-summary">
 <div class="table-header col-first">Modifier and Type</div>
 <div class="table-header col-second">Class</div>
 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color"><code>static class&nbsp;</code></div>
 <div class="col-second even-row-color"><code><span class="member-name-link"><a href="FileSniffer.CoreFormatType.html" title="enum class in com.ibm.dtfj.utils.file">FileSniffer.CoreFormatType</a></span></code></div>
 <div class="col-last even-row-color">&nbsp;</div>
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 <div class="table-header col-first">Constructor</div>
 <div class="table-header col-last">Description</div>
 <div class="col-constructor-name even-row-color"><code><span class="member-name-link"><a href="#%3Cinit%3E()">FileSniffer</a></span>()</code></div>
 <div class="col-last even-row-color">&nbsp;</div>
 </div>
 </section>
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 <section class="method-summary" id="method.summary">
 <h2>Method Summary</h2>
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 <div class="table-header col-first">Modifier and Type</div>
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 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static <a href="FileSniffer.CoreFormatType.html" title="enum class in com.ibm.dtfj.utils.file">FileSniffer.CoreFormatType</a></code></div>
 <div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getCoreFormat(javax.imageio.stream.ImageInputStream)">getCoreFormat</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis)</code></div>
 <div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
 <div class="block">Determine the format of the core file.</div>
 </div>
 <div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
 <div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isCoreFile(java.io.InputStream,long)">isCoreFile</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/InputStream.html" title="class or interface in java.io" class="external-link" target="_blank">InputStream</a>&nbsp;in,
  long&nbsp;filesize)</code></div>
 <div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
 <div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isCoreFile(javax.imageio.stream.ImageInputStream,long)">isCoreFile</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis,
  long&nbsp;filesize)</code></div>
 <div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
 <div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isJavaCoreFile(java.io.InputStream,long)">isJavaCoreFile</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/InputStream.html" title="class or interface in java.io" class="external-link" target="_blank">InputStream</a>&nbsp;in,
  long&nbsp;filesize)</code></div>
 <div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
 <div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isJavaCoreFile(javax.imageio.stream.ImageInputStream,long)">isJavaCoreFile</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis,
  long&nbsp;filesize)</code></div>
 <div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
 <div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isPHDFile(java.io.InputStream,long)">isPHDFile</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/InputStream.html" title="class or interface in java.io" class="external-link" target="_blank">InputStream</a>&nbsp;in,
  long&nbsp;filesize)</code></div>
 <div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
 <div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isPHDFile(javax.imageio.stream.ImageInputStream,long)">isPHDFile</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis,
  long&nbsp;filesize)</code></div>
 <div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
 <div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isZipFile(java.io.File)">isZipFile</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/File.html" title="class or interface in java.io" class="external-link" target="_blank">File</a>&nbsp;file)</code></div>
 <div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
 <div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isZipFile(javax.imageio.stream.ImageInputStream)">isZipFile</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis)</code></div>
 <div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
 <div class="block">Checks to see if the input stream is for a zip file, assumes that the stream is correctly positioned.</div>
 </div>
 </div>
 </div>
 </div>
 <div class="inherited-list">
 <h3 id="methods.inherited.from.class.java.lang.Object">Methods declared in class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link" target="_blank">Object</a></h3>
 <code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link" target="_blank">clone</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link" target="_blank">equals</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link" target="_blank">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link" target="_blank">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link" target="_blank">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link" target="_blank">notify</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link" target="_blank">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link" target="_blank">toString</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link" target="_blank">wait</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link" target="_blank">wait</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link" target="_blank">wait</a></code></div>
 </section>
 </li>
 </ul>
 </section>
 <section class="details">
 <ul class="details-list">
 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 <li>
 <section class="constructor-details" id="constructor.detail">
 <h2>Constructor Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="&lt;init&gt;()">
 <h3>FileSniffer</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">FileSniffer</span>()</div>
 </section>
 </li>
 </ul>
 </section>
 </li>
 <!-- ============ METHOD DETAIL ========== -->
 <li>
 <section class="method-details" id="method.detail">
 <h2>Method Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="getCoreFormat(javax.imageio.stream.ImageInputStream)">
 <h3>getCoreFormat</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="FileSniffer.CoreFormatType.html" title="enum class in com.ibm.dtfj.utils.file">FileSniffer.CoreFormatType</a></span>&nbsp;<span class="element-name">getCoreFormat</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis)</span>
                                                 throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <div class="block">Determine the format of the core file.</div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>iis</code> - stream to the core file</dd>
 <dt>Returns:</dt>
 <dd>format</dd>
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code> - re-thrown</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isCoreFile(java.io.InputStream,long)">
 <h3>isCoreFile</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isCoreFile</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/InputStream.html" title="class or interface in java.io" class="external-link" target="_blank">InputStream</a>&nbsp;in,
  long&nbsp;filesize)</span>
                           throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <dl class="notes">
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code></dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isCoreFile(javax.imageio.stream.ImageInputStream,long)">
 <h3>isCoreFile</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isCoreFile</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis,
  long&nbsp;filesize)</span>
                           throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <dl class="notes">
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code></dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isJavaCoreFile(java.io.InputStream,long)">
 <h3>isJavaCoreFile</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isJavaCoreFile</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/InputStream.html" title="class or interface in java.io" class="external-link" target="_blank">InputStream</a>&nbsp;in,
  long&nbsp;filesize)</span>
                               throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <dl class="notes">
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code></dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isJavaCoreFile(javax.imageio.stream.ImageInputStream,long)">
 <h3>isJavaCoreFile</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isJavaCoreFile</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis,
  long&nbsp;filesize)</span>
                               throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <dl class="notes">
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code></dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isPHDFile(java.io.InputStream,long)">
 <h3>isPHDFile</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isPHDFile</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/InputStream.html" title="class or interface in java.io" class="external-link" target="_blank">InputStream</a>&nbsp;in,
  long&nbsp;filesize)</span>
                          throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <dl class="notes">
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code></dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isPHDFile(javax.imageio.stream.ImageInputStream,long)">
 <h3>isPHDFile</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isPHDFile</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis,
  long&nbsp;filesize)</span>
                          throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <dl class="notes">
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code></dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isZipFile(javax.imageio.stream.ImageInputStream)">
 <h3>isZipFile</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isZipFile</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html" title="class or interface in javax.imageio.stream" class="external-link" target="_blank">ImageInputStream</a>&nbsp;iis)</span>
                          throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <div class="block">Checks to see if the input stream is for a zip file, assumes that the stream is correctly positioned.
  This method will reset the stream if possible to it's starting position. The reason for using this
  method over just trying java.util.zip.ZipFile(File) and catching errors is that on some platforms
  the zip support is provided by native libraries. It is possible to cause the native library to
  crash when speculatively passing files into it.</div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>in</code> - stream to analyze</dd>
 <dt>Returns:</dt>
 <dd>true if it is a zip file</dd>
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code></dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isZipFile(java.io.File)">
 <h3>isZipFile</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isZipFile</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/File.html" title="class or interface in java.io" class="external-link" target="_blank">File</a>&nbsp;file)</span>
                          throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></span></div>
 <dl class="notes">
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link" target="_blank">IOException</a></code></dd>
 </dl>
 </section>
 </li>
 </ul>
 </section>
 </li>
 </ul>
 </section>
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