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<div class="subTitle">org.apache.hadoop.yarn.util.constraint</div>
<h2 title="Interface PlacementConstraintParser.ConstraintTokenizer" class="title">Interface PlacementConstraintParser.ConstraintTokenizer</h2>
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<pre>public static interface <span class="typeNameLabel">PlacementConstraintParser.ConstraintTokenizer</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Enumeration.html?is-external=true" title="class or interface in java.util">Enumeration</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;</pre>
<div class="block">Tokenizer interface that used to parse an expression. It first
validates if the syntax of the given expression is valid, then traverse
the expression and parse it to an enumeration of strings. Each parsed
string can be further consumed by a <a href="../../../../../../org/apache/hadoop/yarn/util/constraint/PlacementConstraintParser.ConstraintParser.html" title="class in org.apache.hadoop.yarn.util.constraint"><code>PlacementConstraintParser.ConstraintParser</code></a> and
transformed to a <a href="../../../../../../org/apache/hadoop/yarn/api/resource/PlacementConstraint.AbstractConstraint.html" title="class in org.apache.hadoop.yarn.api.resource"><code>PlacementConstraint.AbstractConstraint</code></a>.</div>
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<td class="colFirst"><code>default void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/util/constraint/PlacementConstraintParser.ConstraintTokenizer.html#validate--">validate</a></span>()</code>
<div class="block">Validate the schema before actual parsing the expression.</div>
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<pre>default&nbsp;void&nbsp;validate()
throws <a href="../../../../../../org/apache/hadoop/yarn/util/constraint/PlacementConstraintParseException.html" title="class in org.apache.hadoop.yarn.util.constraint">PlacementConstraintParseException</a></pre>
<div class="block">Validate the schema before actual parsing the expression.</div>
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<dt><span class="throwsLabel">Throws:</span></dt>
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