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java.lang.Objectorg.apache.commons.jexl.util.introspection.IntrospectorBase
org.apache.commons.jexl.util.introspection.Introspector
public class Introspector
This basic function of this class is to return a Method object for a particular class given the name of a method and the parameters to the method in the form of an Object[] The first time the Introspector sees a class it creates a class method map for the class in question. Basically the class method map is a Hashtable where Method objects are keyed by a concatenation of the method name and the names of classes that make up the parameters. For example, a method with the following signature: public void method(String a, StringBuffer b) would be mapped by the key: "method" + "java.lang.String" + "java.lang.StringBuffer" This mapping is performed for all the methods in a class and stored for
Field Summary | |
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static java.lang.String |
CACHEDUMP_MSG
define a public string so that it can be looked for if interested. |
private org.apache.commons.logging.Log |
rlog
our engine runtime services. |
Fields inherited from class org.apache.commons.jexl.util.introspection.IntrospectorBase |
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cachedClassNames, classMethodMaps |
Constructor Summary | |
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Introspector(org.apache.commons.logging.Log logger)
Recieves our RuntimeServices object. |
Method Summary | |
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protected void |
clearCache()
Clears the classmap and classname caches, and logs that we did so. |
java.lang.reflect.Method |
getMethod(java.lang.Class c,
java.lang.String name,
java.lang.Object[] params)
Gets the method defined by name and
params for the Class c . |
Methods inherited from class org.apache.commons.jexl.util.introspection.IntrospectorBase |
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createClassMap |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final java.lang.String CACHEDUMP_MSG
private final org.apache.commons.logging.Log rlog
Constructor Detail |
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public Introspector(org.apache.commons.logging.Log logger)
logger
- a Log
.Method Detail |
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public java.lang.reflect.Method getMethod(java.lang.Class c, java.lang.String name, java.lang.Object[] params) throws java.lang.Exception
name
and
params
for the Class c
.
getMethod
in class IntrospectorBase
c
- Class in which the method search is taking placename
- Name of the method being searched forparams
- An array of Objects (not Classes) that describe the
the parameters
java.lang.Exception
- if the superclass does.protected void clearCache()
clearCache
in class IntrospectorBase
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