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<div class="subTitle">org.apache.tools.ant.types.selectors.modifiedselector</div>
<h2 title="Interface Cache" class="title">Interface Cache</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../../../../org/apache/tools/ant/types/selectors/modifiedselector/PropertiesfileCache.html" title="class in org.apache.tools.ant.types.selectors.modifiedselector">PropertiesfileCache</a></dd>
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<pre>public interface <span class="strong">Cache</span></pre>
<div class="block">A Cache let the user store key-value-pairs in a permanent manner and access
them.
It is possible that a client uses get() before load() therefore the
implementation must ensure that no error occurred because of the wrong
<i>order</i>.
The implementing class should implement a useful toString() method.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>Ant 1.6</dd>
<dt><span class="strong">Version:</span></dt>
<dd>2003-09-13</dd></dl>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../org/apache/tools/ant/types/selectors/modifiedselector/Cache.html#delete()">delete</a></strong>()</code>
<div class="block">Deletes the cache.</div>
</td>
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<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../org/apache/tools/ant/types/selectors/modifiedselector/Cache.html#get(java.lang.Object)">get</a></strong>(java.lang.Object key)</code>
<div class="block">Returns a value for a given key from the cache.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../org/apache/tools/ant/types/selectors/modifiedselector/Cache.html#isValid()">isValid</a></strong>()</code>
<div class="block">Checks its prerequisites.</div>
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<td class="colFirst"><code>java.util.Iterator</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../org/apache/tools/ant/types/selectors/modifiedselector/Cache.html#iterator()">iterator</a></strong>()</code>
<div class="block">Returns an iterator over the keys in the cache.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../org/apache/tools/ant/types/selectors/modifiedselector/Cache.html#load()">load</a></strong>()</code>
<div class="block">Loads the cache, must handle not existing cache.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../org/apache/tools/ant/types/selectors/modifiedselector/Cache.html#put(java.lang.Object, java.lang.Object)">put</a></strong>(java.lang.Object key,
java.lang.Object value)</code>
<div class="block">Saves a key-value-pair in the cache.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../org/apache/tools/ant/types/selectors/modifiedselector/Cache.html#save()">save</a></strong>()</code>
<div class="block">Saves modification of the cache.</div>
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<h4>isValid</h4>
<pre>boolean isValid()</pre>
<div class="block">Checks its prerequisites.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd><i>true</i> if all is ok, otherwise <i>false</i>.</dd></dl>
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<h4>delete</h4>
<pre>void delete()</pre>
<div class="block">Deletes the cache. If file based the file has to be deleted also.</div>
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<h4>load</h4>
<pre>void load()</pre>
<div class="block">Loads the cache, must handle not existing cache.</div>
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<h4>save</h4>
<pre>void save()</pre>
<div class="block">Saves modification of the cache.</div>
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<h4>get</h4>
<pre>java.lang.Object get(java.lang.Object key)</pre>
<div class="block">Returns a value for a given key from the cache.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - the key</dd>
<dt><span class="strong">Returns:</span></dt><dd>the stored value</dd></dl>
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<h4>put</h4>
<pre>void put(java.lang.Object key,
java.lang.Object value)</pre>
<div class="block">Saves a key-value-pair in the cache.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - the key</dd><dd><code>value</code> - the value</dd></dl>
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<h4>iterator</h4>
<pre>java.util.Iterator iterator()</pre>
<div class="block">Returns an iterator over the keys in the cache.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>An iterator over the keys.</dd></dl>
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