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| <div class="subTitle">org.eclipse.persistence.sdo.helper.extension</div> |
| <h2 title="Class OPStack" class="title">Class OPStack</h2> |
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| <pre>public class <span class="typeNameLabel">OPStack</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Utility class used for processing an XPath Expression into postfix |
| notation. For example, consider the following expression: |
| |
| quantity=5 and (specialOrder='false' or productName='Lawnmower') |
| |
| The operations performed to create a postfix expression are: |
| 1) add "quantity" to the list |
| 2) push "=" onto the stack |
| 3) add "5" to the list |
| 4) pop "=" off the stack, and add to the list |
| 5) push "and" onto the stack |
| 6) push "(" onto the stack |
| 7) add "specialOrder" to the list |
| 8) push "=" onto the stack |
| 9) add "'false'" to the list |
| 10) pop "=" off the stack, and add to the list |
| 11) push "or" onto the stack |
| 12) add "productName" to the list |
| 13) push "=" onto the stack |
| 14) add "'Lawnmower'" to the list |
| 15) pop "=" off the stack, and add to the list |
| 16) pop "or" off the stack, and add to the list |
| 17) push ")" onto the stack |
| 18) pop "(" ")" pair off the stack |
| 19) pop "and" off the stack, and add to the list |
| |
| The resulting postfix expression is: |
| |
| quantity 5 = specialOrder 'false' = productName 'Lawnmower' = or and</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/eclipse/persistence/sdo/helper/extension/OPStack.html#OPStack--">OPStack</a></span>()</code> |
| <div class="block">The default constructor initializes the stack and |
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| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/eclipse/persistence/sdo/helper/extension/OPStack.html#processExpression-java.lang.String-">processExpression</a></span>(<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> exp)</code> |
| <div class="block">Process an XPath Expression into postfix notation.</div> |
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| <h4>OPStack</h4> |
| <pre>public OPStack()</pre> |
| <div class="block">The default constructor initializes the stack and |
| Token list.</div> |
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| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a> processExpression(<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> exp)</pre> |
| <div class="block">Process an XPath Expression into postfix notation.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>exp</code> - </dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
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