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2021-06-06 17:46:45 +00:00
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<div class="subTitle">com.sleepycat.util</div>
<h2 title="Class FastInputStream" class="title">Class FastInputStream</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>java.io.InputStream</li>
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<ul class="inheritance">
<li>com.sleepycat.util.FastInputStream</li>
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<br>
<pre>public class <span class="typeNameLabel">FastInputStream</span>
extends java.io.InputStream</pre>
<div class="block">A replacement for ByteArrayInputStream that does not synchronize every
byte read.
<p>This class extends <code>InputStream</code> and its <code>read()</code>
methods allow it to be used as a standard input stream. In addition, it
provides <code>readFast()</code> methods that are not declared to throw
<code>IOException</code>. <code>IOException</code> is never thrown by this
class.</p></div>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Mark Hayes</dd>
</dl>
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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>protected byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#buf">buf</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#len">len</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#mark">mark</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#off">off</a></span></code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#FastInputStream-byte:A-">FastInputStream</a></span>(byte[]&nbsp;buffer)</code>
<div class="block">Creates an input stream.</div>
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</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#FastInputStream-byte:A-int-int-">FastInputStream</a></span>(byte[]&nbsp;buffer,
int&nbsp;offset,
int&nbsp;length)</code>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#available--">available</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#getBufferBytes--">getBufferBytes</a></span>()</code>
<div class="block">Returns the underlying data being read.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#getBufferLength--">getBufferLength</a></span>()</code>
<div class="block">Returns the end of the buffer being read.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#getBufferOffset--">getBufferOffset</a></span>()</code>
<div class="block">Returns the offset at which data is being read from the buffer.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#mark-int-">mark</a></span>(int&nbsp;readLimit)</code>&nbsp;</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#markSupported--">markSupported</a></span>()</code>&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#read--">read</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#read-byte:A-">read</a></span>(byte[]&nbsp;toBuf)</code>&nbsp;</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#read-byte:A-int-int-">read</a></span>(byte[]&nbsp;toBuf,
int&nbsp;offset,
int&nbsp;length)</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#readFast--">readFast</a></span>()</code>
<div class="block">Equivalent to <code>read()</code> but does not throw
<code>IOException</code>.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#readFast-byte:A-">readFast</a></span>(byte[]&nbsp;toBuf)</code>
<div class="block">Equivalent to <code>read(byte[])</code> but does not throw
<code>IOException</code>.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#readFast-byte:A-int-int-">readFast</a></span>(byte[]&nbsp;toBuf,
int&nbsp;offset,
int&nbsp;length)</code>
<div class="block">Equivalent to <code>read(byte[],int,int)</code> but does not throw
<code>IOException</code>.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#reset--">reset</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#skip-long-">skip</a></span>(long&nbsp;count)</code>&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/FastInputStream.html#skipFast-int-">skipFast</a></span>(int&nbsp;count)</code>
<div class="block">Equivalent to <code>skip()</code> but takes an int parameter instead of a
long, and does not check whether the count given is larger than the
number of remaining bytes.</div>
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<h3>Methods inherited from class&nbsp;java.io.InputStream</h3>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h3>Field Detail</h3>
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<pre>protected&nbsp;int len</pre>
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<h4>off</h4>
<pre>protected&nbsp;int off</pre>
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<h4>mark</h4>
<pre>protected&nbsp;int mark</pre>
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<pre>protected&nbsp;byte[] buf</pre>
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<h4>FastInputStream</h4>
<pre>public&nbsp;FastInputStream(byte[]&nbsp;buffer)</pre>
<div class="block">Creates an input stream.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buffer</code> - the data to read.</dd>
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<h4>FastInputStream</h4>
<pre>public&nbsp;FastInputStream(byte[]&nbsp;buffer,
int&nbsp;offset,
int&nbsp;length)</pre>
<div class="block">Creates an input stream.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buffer</code> - the data to read.</dd>
<dd><code>offset</code> - the byte offset at which to begin reading.</dd>
<dd><code>length</code> - the number of bytes to read.</dd>
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<h4>available</h4>
<pre>public&nbsp;int&nbsp;available()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>available</code>&nbsp;in class&nbsp;<code>java.io.InputStream</code></dd>
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<pre>public&nbsp;boolean&nbsp;markSupported()</pre>
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<dd><code>markSupported</code>&nbsp;in class&nbsp;<code>java.io.InputStream</code></dd>
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<h4>mark</h4>
<pre>public&nbsp;void&nbsp;mark(int&nbsp;readLimit)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>mark</code>&nbsp;in class&nbsp;<code>java.io.InputStream</code></dd>
</dl>
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<pre>public&nbsp;void&nbsp;reset()</pre>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>reset</code>&nbsp;in class&nbsp;<code>java.io.InputStream</code></dd>
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<pre>public&nbsp;long&nbsp;skip(long&nbsp;count)</pre>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>skip</code>&nbsp;in class&nbsp;<code>java.io.InputStream</code></dd>
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<pre>public&nbsp;int&nbsp;read()</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>read</code>&nbsp;in class&nbsp;<code>java.io.InputStream</code></dd>
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<pre>public&nbsp;int&nbsp;read(byte[]&nbsp;toBuf)</pre>
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<dd><code>read</code>&nbsp;in class&nbsp;<code>java.io.InputStream</code></dd>
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<pre>public&nbsp;int&nbsp;read(byte[]&nbsp;toBuf,
int&nbsp;offset,
int&nbsp;length)</pre>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>read</code>&nbsp;in class&nbsp;<code>java.io.InputStream</code></dd>
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<pre>public final&nbsp;void&nbsp;skipFast(int&nbsp;count)</pre>
<div class="block">Equivalent to <code>skip()</code> but takes an int parameter instead of a
long, and does not check whether the count given is larger than the
number of remaining bytes.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>count</code> - the number of bytes to skip.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../com/sleepycat/util/FastInputStream.html#skip-long-"><code>skip(long)</code></a></dd>
</dl>
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<h4>readFast</h4>
<pre>public final&nbsp;int&nbsp;readFast()</pre>
<div class="block">Equivalent to <code>read()</code> but does not throw
<code>IOException</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the next byte of data, or -1 if at the end of the stream.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../com/sleepycat/util/FastInputStream.html#read--"><code>read()</code></a></dd>
</dl>
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<pre>public final&nbsp;int&nbsp;readFast(byte[]&nbsp;toBuf)</pre>
<div class="block">Equivalent to <code>read(byte[])</code> but does not throw
<code>IOException</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>toBuf</code> - the buffer into which the data is read.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes read, or -1 if at the end of the stream.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../com/sleepycat/util/FastInputStream.html#read-byte:A-"><code>read(byte[])</code></a></dd>
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<h4>readFast</h4>
<pre>public final&nbsp;int&nbsp;readFast(byte[]&nbsp;toBuf,
int&nbsp;offset,
int&nbsp;length)</pre>
<div class="block">Equivalent to <code>read(byte[],int,int)</code> but does not throw
<code>IOException</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>toBuf</code> - the buffer into which the data is read.</dd>
<dd><code>offset</code> - the start offset in array at which the data is written.</dd>
<dd><code>length</code> - the maximum number of bytes to read.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes read, or -1 if at the end of the stream.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../com/sleepycat/util/FastInputStream.html#read-byte:A-int-int-"><code>read(byte[],int,int)</code></a></dd>
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<h4>getBufferBytes</h4>
<pre>public final&nbsp;byte[]&nbsp;getBufferBytes()</pre>
<div class="block">Returns the underlying data being read.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the underlying data.</dd>
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<pre>public final&nbsp;int&nbsp;getBufferOffset()</pre>
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<pre>public final&nbsp;int&nbsp;getBufferLength()</pre>
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