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	<h1 class="page-title">Class: Metadata</h1>
<section>

<header>
    
        <h2>
            <span class="ancestors"><a href="grpc.html">grpc</a>.</span>
        
        Metadata
        </h2>
        
    
</header>


<article>
    <div class="container-overview">
    
        
<hr>
<dt>
    <h4 class="name" id="Metadata"><span class="type-signature"></span>new Metadata()</h4>
    
    
</dt>
<dd>

    
    <div class="description">
        <p>Class for storing metadata. Keys are normalized to lowercase ASCII.</p>
    </div>
    

<dl class="details">
    

</dl>


        <h5>Example</h5>
        
    <pre class="sunlight-highlight-javascript">var metadata = new metadata_module.Metadata();
metadata.set(&#x27;key1&#x27;, &#x27;value1&#x27;);
metadata.add(&#x27;key1&#x27;, &#x27;value2&#x27;);
metadata.get(&#x27;key1&#x27;) // returns [&#x27;value1&#x27;, &#x27;value2&#x27;]</pre>


</dd>

    
    </div>

    
        <h3 class="subsection-title">Methods</h3>

        <dl>
            
<hr>
<dt>
    <h4 class="name" id="add"><span class="type-signature"></span>add(key, value)</h4>
    
    
</dt>
<dd>

    
    <div class="description">
        <p>Adds the given value for the given key. Normalizes the key.</p>
    </div>
    

        <h5>Parameters:</h5>
        

<table class="params table table-striped">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>key</code></td>
            

            <td class="type">
            
                
<span class="param-type">String</span>


            </td>

            
            <td class="description last"><p>The key to add to.</p></td>
        </tr>

    
        <tr>
            
                <td class="name"><code>value</code></td>
            

            <td class="type">
            
                
<span class="param-type">String</span>
|

<span class="param-type">Buffer</span>


            </td>

            
            <td class="description last"><p>The value to add. Must be a buffer if and only
    if the normalized key ends with '-bin'</p></td>
        </tr>

    
    </tbody>
</table>

    
<dl class="details">
    

</dl>


</dd>

        
<hr>
<dt>
    <h4 class="name" id="clone"><span class="type-signature"></span>clone()</h4>
    
    
</dt>
<dd>

    
    <div class="description">
        <p>Clone the metadata object.</p>
    </div>
    

<dl class="details">
    

</dl>


    <h5>Returns:</h5>
    
            
<div class="param-desc">
    <p>The new cloned object</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type"><a href="grpc.Metadata.html">grpc.Metadata</a></span>


    </dd>
</dl>


</dd>

        
<hr>
<dt>
    <h4 class="name" id="get"><span class="type-signature"></span>get(key)</h4>
    
    
</dt>
<dd>

    
    <div class="description">
        <p>Gets a list of all values associated with the key. Normalizes the key.</p>
    </div>
    

        <h5>Parameters:</h5>
        

<table class="params table table-striped">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>key</code></td>
            

            <td class="type">
            
                
<span class="param-type">String</span>


            </td>

            
            <td class="description last"><p>The key to get</p></td>
        </tr>

    
    </tbody>
</table>

    
<dl class="details">
    

</dl>


    <h5>Returns:</h5>
    
            
<div class="param-desc">
    <p>The values associated with that key</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">Array.&lt;(String|Buffer)></span>


    </dd>
</dl>


</dd>

        
<hr>
<dt>
    <h4 class="name" id="getMap"><span class="type-signature"></span>getMap()</h4>
    
    
</dt>
<dd>

    
    <div class="description">
        <p>Get a map of each key to a single associated value. This reflects the most
common way that people will want to see metadata.</p>
    </div>
    

<dl class="details">
    

</dl>


    <h5>Returns:</h5>
    
            
<div class="param-desc">
    <p>A key/value mapping of the metadata</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">Object.&lt;String, (String|Buffer)></span>


    </dd>
</dl>


</dd>

        
<hr>
<dt>
    <h4 class="name" id="remove"><span class="type-signature"></span>remove(key)</h4>
    
    
</dt>
<dd>

    
    <div class="description">
        <p>Remove the given key and any associated values. Normalizes the key.</p>
    </div>
    

        <h5>Parameters:</h5>
        

<table class="params table table-striped">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>key</code></td>
            

            <td class="type">
            
                
<span class="param-type">String</span>


            </td>

            
            <td class="description last"><p>The key to remove</p></td>
        </tr>

    
    </tbody>
</table>

    
<dl class="details">
    

</dl>


</dd>

        
<hr>
<dt>
    <h4 class="name" id="set"><span class="type-signature"></span>set(key, value)</h4>
    
    
</dt>
<dd>

    
    <div class="description">
        <p>Sets the given value for the given key, replacing any other values associated
with that key. Normalizes the key.</p>
    </div>
    

        <h5>Parameters:</h5>
        

<table class="params table table-striped">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>key</code></td>
            

            <td class="type">
            
                
<span class="param-type">String</span>


            </td>

            
            <td class="description last"><p>The key to set</p></td>
        </tr>

    
        <tr>
            
                <td class="name"><code>value</code></td>
            

            <td class="type">
            
                
<span class="param-type">String</span>
|

<span class="param-type">Buffer</span>


            </td>

            
            <td class="description last"><p>The value to set. Must be a buffer if and only
    if the normalized key ends with '-bin'</p></td>
        </tr>

    
    </tbody>
</table>

    
<dl class="details">
    

</dl>


</dd>

        </dl>
    

</article>

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