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-<DT><PRE>public final class <B>SpelHelper</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
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-<p>SpelHelper provides additional functionalities to work with
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-<p>The addition functionalities provided are:</p>
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-<li>Implicit methods</li>
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-<p><strong>Implicit Methods</strong></p>
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-<p>Implicit methods allow one to registers methods with SpelHelper and attach
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-object of that particular class inside a SpEL expression, SpelHelper
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-redirects the method call to the registered method.</p>
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-<p>Example: <a href="../../../net/abhinavsarkar/spelhelper/ImplicitMethods.html#sorted(java.util.List)"><code>ImplicitMethods.sorted(List)</code> </a>method is automatically
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-is the type of the first parameter of the method. In this case, the class is
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-<p>So when an expression like <code>"#list(1,4,2).sorted()"</code> is evaluated, the
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-<a href="../../../net/abhinavsarkar/spelhelper/ImplicitMethods.html#sorted(java.util.List)"><code>ImplicitMethods.sorted(List)</code> </a>method is invoked with the list as its
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-first parameter and its return value is used in further evaluation of the
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-expression.</p>
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-<p>See <a href="../../../net/abhinavsarkar/spelhelper/SpelHelper.html#registerImplicitMethodsFromClass(java.lang.Class)"><code>registerImplicitMethodsFromClass(Class)</code> </a>.</p>
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-<p><strong>Implicit Properties</strong></p>
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-<p>Implicit properties allow one to treat no argument methods of an object
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-as properties of the object. SpelHelper intercepts the property resolution
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-object then it invokes the method on the object and provides its return value
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-as the property value for further evaluation of the expression.</p>
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-<p>Example: Using implicit properties, the example of implicit methods can be
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-<p>SpEL <a href="http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/expressions.html#expressions-ref-functions">allows</a> to register extension function on the context by providing a
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-name and a <a href="http://java.sun.com/javase/6/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect"><code>Method</code> </a>object. SpelHelper simplifies this by taking a class
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-and registering all the <code>public static</code> methods of the class which do not
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-have a <code>void</code> return type. The methods are registered by their simple name.</p>
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-<p>Example: All the methods of <a href="../../../net/abhinavsarkar/spelhelper/ExtensionFunctions.html" title="class in net.abhinavsarkar.spelhelper"><code>ExtensionFunctions</code> </a>class are automatically
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-can be called from inside a SpEL expression using the function call syntax:
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-<code>"#list(1,2,3)</code>".</p>
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-<p>See <a href="../../../net/abhinavsarkar/spelhelper/SpelHelper.html#registerFunctionsFromClass(java.lang.Class)"><code>registerFunctionsFromClass(Class)</code> </a>.</p>
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-<p>SpEL <a href="http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/expressions.html#d0e11927">allows</a> calling constructors from inside a SpEL expression using the
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-<code>new</code> operator. But they have to be called with their full name like:
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-<code>"new org.example.Foo('bar')"</code>. SpelHelper simplifies this by taking a class
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-simple name.</p>
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-<p>Example: After registering the <code>org.example.Foo</code> class with SpelHelper, its
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-<p>See <a href="../../../net/abhinavsarkar/spelhelper/SpelHelper.html#registerConstructorsFromClass(java.lang.Class)"><code>registerConstructorsFromClass(Class)</code> </a>.</p>
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-the SpEL expressions evaluated through SpelHelper. See <a href="../../../net/abhinavsarkar/spelhelper/ExtensionFunctions.html" title="class in net.abhinavsarkar.spelhelper"><code>ExtensionFunctions</code> </a>
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-and <a href="../../../net/abhinavsarkar/spelhelper/ImplicitMethods.html" title="class in net.abhinavsarkar.spelhelper"><code>ImplicitMethods</code> </a>for further details.</p>
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-<DT><B>Author:</B></DT>
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- <DD>Abhinav Sarkar <em>abhinav@abhinavsarkar.net</em></DD>
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-<TD><CODE><B><A HREF="../../../net/abhinavsarkar/spelhelper/SpelHelper.html#evalExpression(java.lang.String, org.springframework.expression.EvaluationContext, java.lang.Class)">evalExpression</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> expressionString,
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- <A HREF="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/EvaluationContext.html?is-external=true" title="class or interface in org.springframework.expression">EvaluationContext</A> evaluationContext,
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- Evaluates a SpEL expression <code>expressionString</code> in the provided
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449
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-<DT><B>Type Parameters:</B><DD><CODE>T</CODE> - The type of the result desired.<DT><B>Parameters:</B><DD><CODE>expressionString</CODE> - The SpEL expression to evaluate.<DD><CODE>rootElement</CODE> - The root element in context of which the expression
|
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450
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-is to be evaluated.<DD><CODE>desiredType</CODE> - The class of the result desired.
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451
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-<DT><B>Returns:</B><DD>The result of the evaluation of the expression.<DT><B>See Also:</B><DD><A HREF="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/ExpressionParser.html?is-external=true#parseExpression(java.lang.String)" title="class or interface in org.springframework.expression"><CODE>ExpressionParser.parseExpression(String)</CODE></A>,
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452
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-<A HREF="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/Expression.html?is-external=true#getValue(org.springframework.expression.EvaluationContext, java.lang.Class)" title="class or interface in org.springframework.expression"><CODE>Expression.getValue(EvaluationContext, Class)</CODE></A></DL>
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-</DD>
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454
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455
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-<HR>
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456
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-
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457
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-<A NAME="evalExpression(java.lang.String, org.springframework.expression.EvaluationContext, java.lang.Class)"><!-- --></A><H3>
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458
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-evalExpression</H3>
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459
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-<PRE>
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460
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-public <T> T <B>evalExpression</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> expressionString,
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461
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- <A HREF="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/EvaluationContext.html?is-external=true" title="class or interface in org.springframework.expression">EvaluationContext</A> evaluationContext,
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462
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- <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><T> desiredType)</PRE>
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463
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-<DL>
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464
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-<DD>Evaluates a SpEL expression <code>expressionString</code> in the provided
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465
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-context <code>evaluationContext</code> and gives back a result of type
|
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466
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-<code>desiredType</code>.
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467
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-<P>
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468
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-<DD><DL>
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469
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-<DT><B>Type Parameters:</B><DD><CODE>T</CODE> - The type of the result desired.<DT><B>Parameters:</B><DD><CODE>expressionString</CODE> - The SpEL expression to evaluate.<DD><CODE>evaluationContext</CODE> - The context in which the expression is to be evaluated.<DD><CODE>desiredType</CODE> - The class of the result desired.
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470
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-<DT><B>Returns:</B><DD>The result of the evaluation of the expression.<DT><B>See Also:</B><DD><A HREF="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/ExpressionParser.html?is-external=true#parseExpression(java.lang.String)" title="class or interface in org.springframework.expression"><CODE>ExpressionParser.parseExpression(String)</CODE></A>,
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471
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-<A HREF="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/Expression.html?is-external=true#getValue(org.springframework.expression.EvaluationContext, java.lang.Class)" title="class or interface in org.springframework.expression"><CODE>Expression.getValue(EvaluationContext, Class)</CODE></A></DL>
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472
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-</DD>
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473
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-</DL>
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474
|
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-<HR>
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475
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-
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476
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-<A NAME="evalExpressions(java.lang.String[], java.lang.Object, java.lang.Class)"><!-- --></A><H3>
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477
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-evalExpressions</H3>
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478
|
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-<PRE>
|
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479
|
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-public <T> T <B>evalExpressions</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] expressionStrings,
|
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480
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- <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> rootElement,
|
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481
|
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- <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><T> desiredType)</PRE>
|
|
482
|
|
-<DL>
|
|
483
|
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-<DD>Evaluates multiple SpEL expressions and returns the result of the last
|
|
484
|
|
-expression.
|
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485
|
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-<P>
|
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486
|
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-<DD><DL>
|
|
487
|
|
-<DT><B>Type Parameters:</B><DD><CODE>T</CODE> - The type of the result desired.<DT><B>Parameters:</B><DD><CODE>expressionStrings</CODE> - The SpEL expressions to evaluate.<DD><CODE>rootElement</CODE> - The root element in context of which the expressions
|
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488
|
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-are to be evaluated.<DD><CODE>desiredType</CODE> - The class of the result desired.
|
|
489
|
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-<DT><B>Returns:</B><DD>The result of the evaluation of the last expression.<DT><B>See Also:</B><DD><A HREF="../../../net/abhinavsarkar/spelhelper/SpelHelper.html#evalExpression(java.lang.String, org.springframework.expression.EvaluationContext, java.lang.Class)"><CODE>evalExpression(String, EvaluationContext, Class)</CODE></A>,
|
|
490
|
|
-<A HREF="../../../net/abhinavsarkar/spelhelper/SpelHelper.html#evalExpression(java.lang.String, java.lang.Object, java.lang.Class)"><CODE>evalExpression(String, Object, Class)</CODE></A></DL>
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491
|
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-</DD>
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492
|
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-</DL>
|
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493
|
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-<HR>
|
|
494
|
|
-
|
|
495
|
|
-<A NAME="evalExpressions(java.lang.String[], org.springframework.expression.EvaluationContext, java.lang.Class)"><!-- --></A><H3>
|
|
496
|
|
-evalExpressions</H3>
|
|
497
|
|
-<PRE>
|
|
498
|
|
-public <T> T <B>evalExpressions</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] expressionStrings,
|
|
499
|
|
- <A HREF="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/EvaluationContext.html?is-external=true" title="class or interface in org.springframework.expression">EvaluationContext</A> evaluationContext,
|
|
500
|
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- <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><T> desiredType)</PRE>
|
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501
|
|
-<DL>
|
|
502
|
|
-<DD>Evaluates multiple SpEL expressions and returns the result of the last
|
|
503
|
|
-expression.
|
|
504
|
|
-<P>
|
|
505
|
|
-<DD><DL>
|
|
506
|
|
-<DT><B>Type Parameters:</B><DD><CODE>T</CODE> - The type of the result desired.<DT><B>Parameters:</B><DD><CODE>expressionStrings</CODE> - The SpEL expressions to evaluate.<DD><CODE>evaluationContext</CODE> - The context in which the expression is to be evaluated.<DD><CODE>desiredType</CODE> - The class of the result desired.
|
|
507
|
|
-<DT><B>Returns:</B><DD>The result of the evaluation of the last expression.<DT><B>See Also:</B><DD><A HREF="../../../net/abhinavsarkar/spelhelper/SpelHelper.html#evalExpression(java.lang.String, org.springframework.expression.EvaluationContext, java.lang.Class)"><CODE>evalExpression(String, EvaluationContext, Class)</CODE></A>,
|
|
508
|
|
-<A HREF="../../../net/abhinavsarkar/spelhelper/SpelHelper.html#evalExpression(java.lang.String, java.lang.Object, java.lang.Class)"><CODE>evalExpression(String, Object, Class)</CODE></A></DL>
|
|
509
|
|
-</DD>
|
|
510
|
|
-</DL>
|
|
511
|
|
-<HR>
|
|
512
|
|
-
|
|
513
|
|
-<A NAME="lookupImplicitMethod(java.lang.String)"><!-- --></A><H3>
|
|
514
|
|
-lookupImplicitMethod</H3>
|
|
515
|
|
-<PRE>
|
|
516
|
|
-public <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect">Method</A> <B>lookupImplicitMethod</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> lookup)</PRE>
|
|
517
|
|
-<DL>
|
|
518
|
|
-<DD>Looks up an implicit method registered with this instance.
|
|
519
|
|
-<P>
|
|
520
|
|
-<DD><DL>
|
|
521
|
|
-<DT><B>Parameters:</B><DD><CODE>lookup</CODE> - key to lookup which should be of form:
|
|
522
|
|
-<code>method.getParameterTypes()[0].getName() + "." + method.getName()</code>
|
|
523
|
|
-<DT><B>Returns:</B><DD>The registered method if found, else null.</DL>
|
|
524
|
|
-</DD>
|
|
525
|
|
-</DL>
|
|
526
|
|
-<HR>
|
|
527
|
|
-
|
|
528
|
|
-<A NAME="lookupImplicitConstructor(java.lang.String)"><!-- --></A><H3>
|
|
529
|
|
-lookupImplicitConstructor</H3>
|
|
530
|
|
-<PRE>
|
|
531
|
|
-public <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/reflect/Constructor.html?is-external=true" title="class or interface in java.lang.reflect">Constructor</A><?> <B>lookupImplicitConstructor</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> lookup)</PRE>
|
|
532
|
|
-<DL>
|
|
533
|
|
-<DD>Looks up an implicit constructor registered with this instance.
|
|
534
|
|
-<P>
|
|
535
|
|
-<DD><DL>
|
|
536
|
|
-<DT><B>Parameters:</B><DD><CODE>lookup</CODE> - key to lookup which should be of form:
|
|
537
|
|
-<code>constructor.getDeclaringClass().getSimpleName()</code>
|
|
538
|
|
- <code>+ Arrays.toString(constructor.getParameterTypes())</code>
|
|
539
|
|
-<DT><B>Returns:</B><DD>The registered constructor if found, else null.</DL>
|
|
540
|
|
-</DD>
|
|
541
|
|
-</DL>
|
|
542
|
|
-<HR>
|
|
543
|
|
-
|
|
544
|
|
-<A NAME="getCurrentContext()"><!-- --></A><H3>
|
|
545
|
|
-getCurrentContext</H3>
|
|
546
|
|
-<PRE>
|
|
547
|
|
-public static <A HREF="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/expression/EvaluationContext.html?is-external=true" title="class or interface in org.springframework.expression">EvaluationContext</A> <B>getCurrentContext</B>()</PRE>
|
|
548
|
|
-<DL>
|
|
549
|
|
-<DD>Returns the current evaluation context. Null if there is no context.
|
|
550
|
|
-<P>
|
|
551
|
|
-<DD><DL>
|
|
552
|
|
-
|
|
553
|
|
-<DT><B>Returns:</B><DD>The current evaluation context.</DL>
|
|
554
|
|
-</DD>
|
|
555
|
|
-</DL>
|
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556
|
|
-<!-- ========= END OF CLASS DATA ========= -->
|
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557
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-<HR>
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558
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