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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.calcite.util</a></div> |
| <h1 title="Interface PartiallyOrderedSet.Ordering" class="title">Interface PartiallyOrderedSet.Ordering<E></h1> |
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| <section class="class-description" id="class-description"> |
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| <dt>Type Parameters:</dt> |
| <dd><code>E</code> - Element type</dd> |
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| <dt>Enclosing class:</dt> |
| <dd><a href="PartiallyOrderedSet.html" title="class in org.apache.calcite.util">PartiallyOrderedSet</a><<a href="PartiallyOrderedSet.html" title="type parameter in PartiallyOrderedSet">E</a>></dd> |
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| <div class="type-signature"><span class="modifiers">public static interface </span><span class="element-name type-name-label">PartiallyOrderedSet.Ordering<E></span></div> |
| <div class="block">Ordering relation. |
| |
| <p>To obey the constraints of the partially-ordered set, the function |
| must be consistent with the reflexive, anti-symmetric, and transitive |
| properties required by a partially ordered set.</p> |
| |
| <p>For instance, if <code>ordering(foo, foo)</code> returned false for any |
| not-null value of foo, it would violate the reflexive property.</p> |
| |
| <p>If an ordering violates any of these required properties, the behavior |
| of a <a href="PartiallyOrderedSet.html" title="class in org.apache.calcite.util"><code>PartiallyOrderedSet</code></a> is unspecified. (But mayhem is |
| likely.)</p></div> |
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| <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>boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#lessThan(E,E)" class="member-name-link">lessThan</a><wbr>(<a href="PartiallyOrderedSet.Ordering.html" title="type parameter in PartiallyOrderedSet.Ordering">E</a> e1, |
| <a href="PartiallyOrderedSet.Ordering.html" title="type parameter in PartiallyOrderedSet.Ordering">E</a> e2)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns whether element e1 is ≤ e2 according to |
| the relation that defines a partially-ordered set.</div> |
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| <h2>Method Details</h2> |
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| <section class="detail" id="lessThan(E,E)"> |
| <h3 id="lessThan(java.lang.Object,java.lang.Object)">lessThan</h3> |
| <div class="member-signature"><span class="return-type">boolean</span> <span class="element-name">lessThan</span><wbr><span class="parameters">(<a href="PartiallyOrderedSet.Ordering.html" title="type parameter in PartiallyOrderedSet.Ordering">E</a> e1, |
| <a href="PartiallyOrderedSet.Ordering.html" title="type parameter in PartiallyOrderedSet.Ordering">E</a> e2)</span></div> |
| <div class="block">Returns whether element e1 is ≤ e2 according to |
| the relation that defines a partially-ordered set.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>e1</code> - Element 1</dd> |
| <dd><code>e2</code> - Element 2</dd> |
| <dt>Returns:</dt> |
| <dd>Whether element 1 is ≤ element 2</dd> |
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