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<div class="subTitle">com.fluidops.fedx.algebra</div>
<h2 title="Interface FilterTuple" class="title">Interface FilterTuple</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../com/fluidops/fedx/algebra/ExclusiveGroup.html" title="class in com.fluidops.fedx.algebra">ExclusiveGroup</a>, <a href="../../../../com/fluidops/fedx/algebra/ExclusiveStatement.html" title="class in com.fluidops.fedx.algebra">ExclusiveStatement</a>, <a href="../../../../com/fluidops/fedx/algebra/FedXStatementPattern.html" title="class in com.fluidops.fedx.algebra">FedXStatementPattern</a>, <a href="../../../../com/fluidops/fedx/algebra/StatementSourcePattern.html" title="class in com.fluidops.fedx.algebra">StatementSourcePattern</a></dd>
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<pre>public interface <a href="../../../../src-html/com/fluidops/fedx/algebra/FilterTuple.html#line.35">FilterTuple</a></pre>
<div class="block">Expressions implementing this interface can apply some <a href="../../../../com/fluidops/fedx/algebra/FilterValueExpr.html" title="interface in com.fluidops.fedx.algebra"><code>FilterValueExpr</code></a>
 during evaluation.</div>
<dl><dt><span class="strong">Author:</span></dt>
  <dd>Andreas Schwarte</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../../com/fluidops/fedx/algebra/StatementSourcePattern.html" title="class in com.fluidops.fedx.algebra"><code>StatementSourcePattern</code></a>, 
<a href="../../../../com/fluidops/fedx/algebra/ExclusiveStatement.html" title="class in com.fluidops.fedx.algebra"><code>ExclusiveStatement</code></a>, 
<a href="../../../../com/fluidops/fedx/algebra/ExclusiveGroup.html" title="class in com.fluidops.fedx.algebra"><code>ExclusiveGroup</code></a></dd></dl>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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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="../../../../com/fluidops/fedx/algebra/FilterTuple.html#addBoundFilter(java.lang.String, org.openrdf.model.Value)">addBoundFilter</a></strong>(java.lang.String&nbsp;varName,
                            org.openrdf.model.Value&nbsp;value)</code>
<div class="block">register a filter that can be directly expressed as a binding, e.g.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/fluidops/fedx/algebra/FilterTuple.html#addFilterExpr(com.fluidops.fedx.algebra.FilterExpr)">addFilterExpr</a></strong>(<a href="../../../../com/fluidops/fedx/algebra/FilterExpr.html" title="class in com.fluidops.fedx.algebra">FilterExpr</a>&nbsp;expr)</code>
<div class="block">register a new filter expression.</div>
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<td class="colFirst"><code><a href="../../../../com/fluidops/fedx/algebra/FilterValueExpr.html" title="interface in com.fluidops.fedx.algebra">FilterValueExpr</a></code></td>
<td class="colLast"><code><strong><a href="../../../../com/fluidops/fedx/algebra/FilterTuple.html#getFilterExpr()">getFilterExpr</a></strong>()</code>&nbsp;</td>
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<td class="colFirst"><code>java.util.List&lt;java.lang.String&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../com/fluidops/fedx/algebra/FilterTuple.html#getFreeVars()">getFreeVars</a></strong>()</code>&nbsp;</td>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/fluidops/fedx/algebra/FilterTuple.html#hasFilter()">hasFilter</a></strong>()</code>&nbsp;</td>
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<h4>hasFilter</h4>
<pre>boolean&nbsp;<a href="../../../../src-html/com/fluidops/fedx/algebra/FilterTuple.html#line.41">hasFilter</a>()</pre>
<dl><dt><span class="strong">Returns:</span></dt><dd>true if this expression has a filter to apply</dd></dl>
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<h4>addFilterExpr</h4>
<pre>void&nbsp;<a href="../../../../src-html/com/fluidops/fedx/algebra/FilterTuple.html#line.49">addFilterExpr</a>(<a href="../../../../com/fluidops/fedx/algebra/FilterExpr.html" title="class in com.fluidops.fedx.algebra">FilterExpr</a>&nbsp;expr)</pre>
<div class="block">register a new filter expression. If the expr has already a filter registered, the
 new expression is added to a <a href="../../../../com/fluidops/fedx/algebra/ConjunctiveFilterExpr.html" title="class in com.fluidops.fedx.algebra"><code>ConjunctiveFilterExpr</code></a>.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>expr</code> - </dd></dl>
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<h4>addBoundFilter</h4>
<pre>void&nbsp;<a href="../../../../src-html/com/fluidops/fedx/algebra/FilterTuple.html#line.69">addBoundFilter</a>(java.lang.String&nbsp;varName,
                  org.openrdf.model.Value&nbsp;value)</pre>
<div class="block">register a filter that can be directly expressed as a binding, e.g.
 
 SELECT * WHERE {
  ?s p o .
  FILTER (?s = X)
 }
 
 is equivalent to 
 
 SELECT * WHERE {
        X p o .
 }</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>varName</code> - </dd><dd><code>value</code> - </dd></dl>
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<a name="getFilterExpr()">
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<h4>getFilterExpr</h4>
<pre><a href="../../../../com/fluidops/fedx/algebra/FilterValueExpr.html" title="interface in com.fluidops.fedx.algebra">FilterValueExpr</a>&nbsp;<a href="../../../../src-html/com/fluidops/fedx/algebra/FilterTuple.html#line.78">getFilterExpr</a>()</pre>
<dl><dt><span class="strong">Returns:</span></dt><dd>the currently registered filter expressions, usually of type <a href="../../../../com/fluidops/fedx/algebra/FilterExpr.html" title="class in com.fluidops.fedx.algebra"><code>FilterExpr</code></a>
                or <a href="../../../../com/fluidops/fedx/algebra/ConjunctiveFilterExpr.html" title="class in com.fluidops.fedx.algebra"><code>ConjunctiveFilterExpr</code></a></dd></dl>
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<h4>getFreeVars</h4>
<pre>java.util.List&lt;java.lang.String&gt;&nbsp;<a href="../../../../src-html/com/fluidops/fedx/algebra/FilterTuple.html#line.84">getFreeVars</a>()</pre>
<dl><dt><span class="strong">Returns:</span></dt><dd>the free variables of this expression</dd></dl>
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