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<title>DeliveryTag (Qpid ProtonJ2 Parent 1.0.0-M19 API)</title>
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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.qpid.protonj2.types</a></div>
<h1 title="Interface DeliveryTag" class="title">Interface DeliveryTag</h1>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Known Implementing Classes:</dt>
<dd><code><a href="DeliveryTag.ProtonDeliveryTag.html" title="class in org.apache.qpid.protonj2.types">DeliveryTag.ProtonDeliveryTag</a></code>, <code><a href="../engine/impl/ProtonSequentialTagGenerator.ProtonNumericDeliveryTag.html" title="class in org.apache.qpid.protonj2.engine.impl">ProtonSequentialTagGenerator.ProtonNumericDeliveryTag</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public interface </span><span class="element-name type-name-label">DeliveryTag</span></div>
<div class="block">An abstraction around Transfer frames Binary delivery tag which can be used to
provide additional features to code sending transfers such as tag pooling etc.</div>
<dl class="notes">
<dt>See Also:</dt>
<dd>
<ul class="see-list">
<li><a href="../buffer/ProtonBuffer.html" title="interface in org.apache.qpid.protonj2.buffer"><code>ProtonBuffer</code></a></li>
<li><a href="transport/Transfer.html" title="class in org.apache.qpid.protonj2.types.transport"><code>Transfer</code></a></li>
</ul>
</dd>
</dl>
</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">Interface</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><a href="DeliveryTag.ProtonDeliveryTag.html" class="type-name-link" title="class in org.apache.qpid.protonj2.types">DeliveryTag.ProtonDeliveryTag</a></code></div>
<div class="col-last even-row-color">
<div class="block">A default DeliveryTag implementation that can be used by a codec when decoding DeliveryTag
instances from the wire.</div>
</div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
<li>
<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>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="DeliveryTag.html" title="interface in org.apache.qpid.protonj2.types">DeliveryTag</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#copy()" class="member-name-link">copy</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
<div class="block">Create a copy of this delivery tag, the copy should account for any underlying pooling of tags that
the tag source's implementation is using.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default void</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#release()" class="member-name-link">release</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5">
<div class="block">Optional method used by tag implementations that provide pooling of tags.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="../buffer/ProtonBuffer.html" title="interface in org.apache.qpid.protonj2.buffer">ProtonBuffer</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#tagBuffer()" class="member-name-link">tagBuffer</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
<div class="block">Returns a view of this <a href="DeliveryTag.html" title="interface in org.apache.qpid.protonj2.types"><code>DeliveryTag</code></a> object as a <a href="../buffer/ProtonBuffer.html" title="interface in org.apache.qpid.protonj2.buffer"><code>ProtonBuffer</code></a>.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>byte[]</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#tagBytes()" class="member-name-link">tagBytes</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
<div class="block">Returns a view of this <a href="DeliveryTag.html" title="interface in org.apache.qpid.protonj2.types"><code>DeliveryTag</code></a> object as a byte array.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>int</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#tagLength()" class="member-name-link">tagLength</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>void</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#writeTo(org.apache.qpid.protonj2.buffer.ProtonBuffer)" class="member-name-link">writeTo</a><wbr>(<a href="../buffer/ProtonBuffer.html" title="interface in org.apache.qpid.protonj2.buffer">ProtonBuffer</a>&nbsp;buffer)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
<div class="block">Writes the tag as a sequence of bytes into the given buffer in the manner most efficient
for the underlying <a href="DeliveryTag.html" title="interface in org.apache.qpid.protonj2.types"><code>DeliveryTag</code></a> implementation.</div>
</div>
</div>
</div>
</div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="tagLength()">
<h3>tagLength</h3>
<div class="member-signature"><span class="return-type">int</span>&nbsp;<span class="element-name">tagLength</span>()</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>the total number of bytes needed to represent the given tag.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="tagBytes()">
<h3>tagBytes</h3>
<div class="member-signature"><span class="return-type">byte[]</span>&nbsp;<span class="element-name">tagBytes</span>()</div>
<div class="block">Returns a view of this <a href="DeliveryTag.html" title="interface in org.apache.qpid.protonj2.types"><code>DeliveryTag</code></a> object as a byte array. The returned array may
be the actual underlying tag bytes or a synthetic view based on the value used to generate
the tag. It is advised not to modify the returned value and copy if such modification are
necessary to the caller.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>the underlying tag bytes as a byte array that may or may no be a singleton instance..</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="tagBuffer()">
<h3>tagBuffer</h3>
<div class="member-signature"><span class="return-type"><a href="../buffer/ProtonBuffer.html" title="interface in org.apache.qpid.protonj2.buffer">ProtonBuffer</a></span>&nbsp;<span class="element-name">tagBuffer</span>()</div>
<div class="block">Returns a view of this <a href="DeliveryTag.html" title="interface in org.apache.qpid.protonj2.types"><code>DeliveryTag</code></a> object as a <a href="../buffer/ProtonBuffer.html" title="interface in org.apache.qpid.protonj2.buffer"><code>ProtonBuffer</code></a>. The returned array
may be the actual underlying tag bytes or a synthetic view based on the value used to generate
the tag. It is advised not to modify the returned value and copy if such modification are
necessary to the caller.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>the ProtonBuffer view of the tag bytes.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="release()">
<h3>release</h3>
<div class="member-signature"><span class="modifiers">default</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">release</span>()</div>
<div class="block">Optional method used by tag implementations that provide pooling of tags.</div>
</section>
</li>
<li>
<section class="detail" id="copy()">
<h3>copy</h3>
<div class="member-signature"><span class="return-type"><a href="DeliveryTag.html" title="interface in org.apache.qpid.protonj2.types">DeliveryTag</a></span>&nbsp;<span class="element-name">copy</span>()</div>
<div class="block">Create a copy of this delivery tag, the copy should account for any underlying pooling of tags that
the tag source's implementation is using.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>a copy of the underlying bytes that compose this delivery tag.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="writeTo(org.apache.qpid.protonj2.buffer.ProtonBuffer)">
<h3>writeTo</h3>
<div class="member-signature"><span class="return-type">void</span>&nbsp;<span class="element-name">writeTo</span><wbr><span class="parameters">(<a href="../buffer/ProtonBuffer.html" title="interface in org.apache.qpid.protonj2.buffer">ProtonBuffer</a>&nbsp;buffer)</span></div>
<div class="block">Writes the tag as a sequence of bytes into the given buffer in the manner most efficient
for the underlying <a href="DeliveryTag.html" title="interface in org.apache.qpid.protonj2.types"><code>DeliveryTag</code></a> implementation.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>buffer</code> - The target buffer where the tag bytes are to be written.</dd>
</dl>
</section>
</li>
</ul>
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</li>
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