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| <div class="subTitle">org.apache.openjpa.persistence.query</div> |
| <h2 title="Interface PathExpression" class="title">Interface PathExpression</h2> |
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| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</a>, <a href="../../../../../org/apache/openjpa/persistence/query/OrderByItem.html" title="interface in org.apache.openjpa.persistence.query">OrderByItem</a>, <a href="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html" title="interface in org.apache.openjpa.persistence.query">PredicateOperand</a>, <a href="../../../../../org/apache/openjpa/persistence/query/SelectItem.html" title="interface in org.apache.openjpa.persistence.query">SelectItem</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Subinterfaces:</dt> |
| <dd><a href="../../../../../org/apache/openjpa/persistence/query/DomainObject.html" title="interface in org.apache.openjpa.persistence.query">DomainObject</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../../org/apache/openjpa/persistence/query/AbstractDomainObject.html" title="class in org.apache.openjpa.persistence.query">AbstractDomainObject</a>, <a href="../../../../../org/apache/openjpa/persistence/query/EntryExpression.html" title="class in org.apache.openjpa.persistence.query">EntryExpression</a>, <a href="../../../../../org/apache/openjpa/persistence/query/FetchPath.html" title="class in org.apache.openjpa.persistence.query">FetchPath</a>, <a href="../../../../../org/apache/openjpa/persistence/query/JoinPath.html" title="class in org.apache.openjpa.persistence.query">JoinPath</a>, <a href="../../../../../org/apache/openjpa/persistence/query/KeyExpression.html" title="class in org.apache.openjpa.persistence.query">KeyExpression</a>, <a href="../../../../../org/apache/openjpa/persistence/query/OperatorPath.html" title="class in org.apache.openjpa.persistence.query">OperatorPath</a>, <a href="../../../../../org/apache/openjpa/persistence/query/RootPath.html" title="class in org.apache.openjpa.persistence.query">RootPath</a>, <a href="../../../../../org/apache/openjpa/persistence/query/ValueExpression.html" title="class in org.apache.openjpa.persistence.query">ValueExpression</a></dd> |
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| <br> |
| <pre>public interface <span class="strong">PathExpression</span> |
| extends <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</a></pre> |
| <div class="block">Interface for operations over objects reached via paths</div> |
| </li> |
| </ul> |
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| <div class="summary"> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span>Methods</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#avg()">avg</a></strong>()</code> |
| <div class="block">Specify that the avg operation is to be applied.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#count()">count</a></strong>()</code> |
| <div class="block">Specify that the count operation is to be applied.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html" title="interface in org.apache.openjpa.persistence.query">PathExpression</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#get(java.lang.String)">get</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> attributeName)</code> |
| <div class="block">Return a path expression corresponding to the referenced attribute.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/Predicate.html" title="interface in org.apache.openjpa.persistence.query">Predicate</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#isEmpty()">isEmpty</a></strong>()</code> |
| <div class="block">Add a restriction that the path expression must correspond to an |
| association or element collection that is empty (has no elements).</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#max()">max</a></strong>()</code> |
| <div class="block">Specify that the max operation is to be applied.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#min()">min</a></strong>()</code> |
| <div class="block">Specify that the min operation is to be applied.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#size()">size</a></strong>()</code> |
| <div class="block">Return an expression that corresponds to the number of elements |
| association or element collection corresponding to the path expression.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#sum()">sum</a></strong>()</code> |
| <div class="block">Specify that the sum operation is to be applied.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html#type()">type</a></strong>()</code> |
| <div class="block">Return an expression that corresponds to the type of the entity.</div> |
| </td> |
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| <h3>Methods inherited from interface org.apache.openjpa.persistence.query.<a href="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</a></h3> |
| <code><a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#abs()">abs</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#concat(org.apache.openjpa.persistence.query.Expression...)">concat</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#concat(java.lang.String...)">concat</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#dividedBy(org.apache.openjpa.persistence.query.Expression)">dividedBy</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#dividedBy(java.lang.Number)">dividedBy</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(java.lang.Class...)">in</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(java.lang.Enum...)">in</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(org.apache.openjpa.persistence.query.Expression...)">in</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(java.lang.Number...)">in</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(java.lang.String...)">in</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#in(org.apache.openjpa.persistence.query.Subquery)">in</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#isNull()">isNull</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#length()">length</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(org.apache.openjpa.persistence.query.Expression)">locate</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(org.apache.openjpa.persistence.query.Expression,%20org.apache.openjpa.persistence.query.Expression)">locate</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(org.apache.openjpa.persistence.query.Expression,%20int)">locate</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(java.lang.String)">locate</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(java.lang.String,%20org.apache.openjpa.persistence.query.Expression)">locate</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#locate(java.lang.String,%20int)">locate</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#lower()">lower</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#member(org.apache.openjpa.persistence.query.PathExpression)">member</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#minus()">minus</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#minus(org.apache.openjpa.persistence.query.Expression)">minus</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#minus(java.lang.Number)">minus</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#mod(org.apache.openjpa.persistence.query.Expression)">mod</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#mod(int)">mod</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#plus(org.apache.openjpa.persistence.query.Expression)">plus</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#plus(java.lang.Number)">plus</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#sqrt()">sqrt</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(org.apache.openjpa.persistence.query.Expression)">substring</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(org.apache.openjpa.persistence.query.Expression,%20org.apache.openjpa.persistence.query.Expression)">substring</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(org.apache.openjpa.persistence.query.Expression,%20int)">substring</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(int)">substring</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(int,%20org.apache.openjpa.persistence.query.Expression)">substring</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#substring(int,%20int)">substring</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#times(org.apache.openjpa.persistence.query.Expression)">times</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#times(java.lang.Number)">times</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim()">trim</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(char)">trim</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(char,%20org.apache.openjpa.persistence.query.TrimSpec)">trim</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(org.apache.openjpa.persistence.query.Expression)">trim</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(org.apache.openjpa.persistence.query.Expression,%20org.apache.openjpa.persistence.query.TrimSpec)">trim</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#trim(org.apache.openjpa.persistence.query.TrimSpec)">trim</a>, <a href="../../../../../org/apache/openjpa/persistence/query/Expression.html#upper()">upper</a></code></li> |
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| <h3>Methods inherited from interface org.apache.openjpa.persistence.query.<a href="../../../../../org/apache/openjpa/persistence/query/SelectItem.html" title="interface in org.apache.openjpa.persistence.query">SelectItem</a></h3> |
| <code><a href="../../../../../org/apache/openjpa/persistence/query/SelectItem.html#asc()">asc</a>, <a href="../../../../../org/apache/openjpa/persistence/query/SelectItem.html#desc()">desc</a></code></li> |
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| <h3>Methods inherited from interface org.apache.openjpa.persistence.query.<a href="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html" title="interface in org.apache.openjpa.persistence.query">PredicateOperand</a></h3> |
| <code><a href="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.util.Calendar,%20java.util.Calendar)">between</a>, <a href="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.util.Calendar,%20org.apache.openjpa.persistence.query.PredicateOperand)">between</a>, <a href="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.util.Date,%20java.util.Date)">between</a>, <a href="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.util.Date,%20org.apache.openjpa.persistence.query.PredicateOperand)">between</a>, <a href="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.lang.Number,%20java.lang.Number)">between</a>, <a href="../../../../../org/apache/openjpa/persistence/query/PredicateOperand.html#between(java.lang.Number,%20org.apache.openjpa.persistence.query.PredicateOperand)">between</a>, <a 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| <pre><a href="../../../../../org/apache/openjpa/persistence/query/PathExpression.html" title="interface in org.apache.openjpa.persistence.query">PathExpression</a> get(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> attributeName)</pre> |
| <div class="block">Return a path expression corresponding to the referenced attribute. It is |
| not permitted to invoke this method on a path expression that corresponds |
| to a multi-valued association or element collection. The path expression |
| on which this method is invoked must correspond to a class containing the |
| referenced attribute.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>attributeName</code> - - |
| name of the referenced attribute</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>path expression</dd></dl> |
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| <div class="block">Return an expression that corresponds to the type of the entity. This |
| method can only be invoked on a path expression corresponding to an |
| entity. It is not permitted to invoke this method on a path expression |
| that corresponds to a multi-valued association.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>expression denoting the entity's type</dd></dl> |
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| <pre><a href="../../../../../org/apache/openjpa/persistence/query/Expression.html" title="interface in org.apache.openjpa.persistence.query">Expression</a> size()</pre> |
| <div class="block">Return an expression that corresponds to the number of elements |
| association or element collection corresponding to the path expression. |
| This method can only be invoked on a path expression that corresponds to |
| a multi-valued association or to an element collection.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>expression denoting the size</dd></dl> |
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| <div class="block">Add a restriction that the path expression must correspond to an |
| association or element collection that is empty (has no elements). This |
| method can only be invoked on a path expression that corresponds to a |
| multi-valued association or to an element collection.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>predicate corresponding to the restriction</dd></dl> |
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| <div class="block">Specify that the avg operation is to be applied. The path expression must |
| correspond to an attribute of a numeric type. It is not permitted to |
| invoke this method on a path expression that corresponds to a |
| multi-valued association or element collection.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>the resulting aggregate</dd></dl> |
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| <div class="block">Specify that the max operation is to be applied. The path expression must |
| correspond to an attribute of an orderable type. It is not permitted to |
| invoke this method on a path expression that corresponds to a |
| multi-valued association or element collection.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>the resulting aggregate</dd></dl> |
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| <pre><a href="../../../../../org/apache/openjpa/persistence/query/Aggregate.html" title="interface in org.apache.openjpa.persistence.query">Aggregate</a> min()</pre> |
| <div class="block">Specify that the min operation is to be applied. The path expression must |
| correspond to an attribute of an orderable type. It is not permitted to |
| invoke this method on a path expression that corresponds to a |
| multi-valued association or element collection.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>the resulting aggregate</dd></dl> |
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| <div class="block">Specify that the count operation is to be applied. It is not permitted to |
| invoke this method on a path expression that corresponds to a |
| multi-valued association or element collection.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>the resulting aggregate</dd></dl> |
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| <div class="block">Specify that the sum operation is to be applied. The path expression must |
| correspond to an attribute of a numeric type. It is not permitted to |
| invoke this method on a path expression that corresponds to a |
| multi-valued association or element collection.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>the resulting aggregate</dd></dl> |
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