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<h2 title="Class MessageDigestCalculatingInputStream" class="title">Class MessageDigestCalculatingInputStream</h2>
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<li><a href="http://docs.oracle.com/javase/7/docs/api/java/io/FilterInputStream.html?is-external=true" title="class or interface in java.io">java.io.FilterInputStream</a></li>
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<ul class="inheritance">
<li><a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html" title="class in org.apache.commons.io.input">org.apache.commons.io.input.ProxyInputStream</a></li>
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<li><a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html" title="class in org.apache.commons.io.input">org.apache.commons.io.input.ObservableInputStream</a></li>
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<pre>public class <span class="typeNameLabel">MessageDigestCalculatingInputStream</span>
extends <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html" title="class in org.apache.commons.io.input">ObservableInputStream</a></pre>
<div class="block">This class is an example for using an <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html" title="class in org.apache.commons.io.input"><code>ObservableInputStream</code></a>. It
 creates its own <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.Observer.html" title="class in org.apache.commons.io.input"><code>ObservableInputStream.Observer</code></a>,
 which calculates a checksum using a MessageDigest, for example an MD5 sum.
 <em>Note</em>: Neither <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html" title="class in org.apache.commons.io.input"><code>ObservableInputStream</code></a>, nor <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a>,
 are thread safe. So is <a href="../../../../../org/apache/commons/io/input/MessageDigestCalculatingInputStream.html" title="class in org.apache.commons.io.input"><code>MessageDigestCalculatingInputStream</code></a>.</div>
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<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/input/MessageDigestCalculatingInputStream.MessageDigestMaintainingObserver.html" title="class in org.apache.commons.io.input">MessageDigestCalculatingInputStream.MessageDigestMaintainingObserver</a></span></code>
<div class="block">Maintains the message digest.</div>
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<code><a href="../../../../../org/apache/commons/io/input/ObservableInputStream.Observer.html" title="class in org.apache.commons.io.input">ObservableInputStream.Observer</a></code></li>
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<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/FilterInputStream.html?is-external=true#in" title="class or interface in java.io">in</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/input/MessageDigestCalculatingInputStream.html#MessageDigestCalculatingInputStream-java.io.InputStream-">MessageDigestCalculatingInputStream</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;pStream)</code>
<div class="block">Creates a new instance, which calculates a signature on the given stream,
 using a <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a> with the "MD5" algorithm.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/input/MessageDigestCalculatingInputStream.html#MessageDigestCalculatingInputStream-java.io.InputStream-java.security.MessageDigest-">MessageDigestCalculatingInputStream</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;pStream,
                                   <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security">MessageDigest</a>&nbsp;pDigest)</code>
<div class="block">Creates a new instance, which calculates a signature on the given stream,
 using the given <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a>.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/input/MessageDigestCalculatingInputStream.html#MessageDigestCalculatingInputStream-java.io.InputStream-java.lang.String-">MessageDigestCalculatingInputStream</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;pStream,
                                   <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pAlgorithm)</code>
<div class="block">Creates a new instance, which calculates a signature on the given stream,
 using a <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a> with the given algorithm.</div>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security">MessageDigest</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/commons/io/input/MessageDigestCalculatingInputStream.html#getMessageDigest--">getMessageDigest</a></span>()</code>
<div class="block">Returns the <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a>, which is being used for generating the
 checksum.</div>
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<h3>Methods inherited from class&nbsp;org.apache.commons.io.input.<a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html" title="class in org.apache.commons.io.input">ObservableInputStream</a></h3>
<code><a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#add-org.apache.commons.io.input.ObservableInputStream.Observer-">add</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#close--">close</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#consume--">consume</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#getObservers--">getObservers</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#noteClosed--">noteClosed</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#noteDataByte-int-">noteDataByte</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#noteDataBytes-byte:A-int-int-">noteDataBytes</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#noteError-java.io.IOException-">noteError</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#noteFinished--">noteFinished</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#read--">read</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#read-byte:A-">read</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#read-byte:A-int-int-">read</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#remove-org.apache.commons.io.input.ObservableInputStream.Observer-">remove</a>, <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#removeAllObservers--">removeAllObservers</a></code></li>
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<code><a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html#afterRead-int-">afterRead</a>, <a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html#available--">available</a>, <a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html#beforeRead-int-">beforeRead</a>, <a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html#handleIOException-java.io.IOException-">handleIOException</a>, <a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html#mark-int-">mark</a>, <a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html#markSupported--">markSupported</a>, <a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html#reset--">reset</a>, <a href="../../../../../org/apache/commons/io/input/ProxyInputStream.html#skip-long-">skip</a></code></li>
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<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h4>MessageDigestCalculatingInputStream</h4>
<pre>public&nbsp;MessageDigestCalculatingInputStream(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;pStream,
                                           <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security">MessageDigest</a>&nbsp;pDigest)</pre>
<div class="block">Creates a new instance, which calculates a signature on the given stream,
 using the given <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pStream</code> - the stream to calculate the message digest for</dd>
<dd><code>pDigest</code> - the message digest to use</dd>
</dl>
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<h4>MessageDigestCalculatingInputStream</h4>
<pre>public&nbsp;MessageDigestCalculatingInputStream(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;pStream,
                                           <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pAlgorithm)
                                    throws <a href="http://docs.oracle.com/javase/7/docs/api/java/security/NoSuchAlgorithmException.html?is-external=true" title="class or interface in java.security">NoSuchAlgorithmException</a></pre>
<div class="block">Creates a new instance, which calculates a signature on the given stream,
 using a <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a> with the given algorithm.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pStream</code> - the stream to calculate the message digest for</dd>
<dd><code>pAlgorithm</code> - the name of the algorithm to use</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/security/NoSuchAlgorithmException.html?is-external=true" title="class or interface in java.security">NoSuchAlgorithmException</a></code> - if no Provider supports a MessageDigestSpi implementation for the specified algorithm.</dd>
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<h4>MessageDigestCalculatingInputStream</h4>
<pre>public&nbsp;MessageDigestCalculatingInputStream(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;pStream)
                                    throws <a href="http://docs.oracle.com/javase/7/docs/api/java/security/NoSuchAlgorithmException.html?is-external=true" title="class or interface in java.security">NoSuchAlgorithmException</a></pre>
<div class="block">Creates a new instance, which calculates a signature on the given stream,
 using a <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a> with the "MD5" algorithm.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pStream</code> - the stream to calculate the message digest for</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/security/NoSuchAlgorithmException.html?is-external=true" title="class or interface in java.security">NoSuchAlgorithmException</a></code> - if no Provider supports a MessageDigestSpi implementation for the specified algorithm.</dd>
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<h4>getMessageDigest</h4>
<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security">MessageDigest</a>&nbsp;getMessageDigest()</pre>
<div class="block">Returns the <a href="http://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html?is-external=true" title="class or interface in java.security"><code>MessageDigest</code></a>, which is being used for generating the
 checksum.
 <em>Note</em>: The checksum will only reflect the data, which has been read so far.
 This is probably not, what you expect. Make sure, that the complete data has been
 read, if that is what you want. The easiest way to do so is by invoking
 <a href="../../../../../org/apache/commons/io/input/ObservableInputStream.html#consume--"><code>ObservableInputStream.consume()</code></a>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the message digest used</dd>
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