Package org.apache.velocity.util.introspection

Class IntrospectorCache

  • public final class IntrospectorCache
extends java.lang.Object
    This is the internal introspector cache implementation.
    Since:
    1.5
    Version:
    $Id$

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static java.lang.String CACHEDUMP_MSG
      define a public string so that it can be looked for if interested
      private java.util.Map<java.lang.Class<?>,​ClassFieldMap> classFieldMapCache
      Holds the field maps for the classes we know about.
      private java.util.Map<java.lang.Class<?>,​ClassMap> classMapCache
      Holds the method maps for the classes we know about.
      private java.util.Set<java.lang.String> classNameCache
      Keep the names of the classes in another map.
      private TypeConversionHandler conversionHandler
      Conversion handler
      private org.slf4j.Logger log
      Class logger

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void clear()
      Clears the internal cache.
      ClassMap get​(java.lang.Class<?> c)
      Lookup a given Class object in the cache.
      ClassFieldMap getFieldMap​(java.lang.Class<?> c)
      Lookup a given Class object in the cache.
      ClassMap put​(java.lang.Class<?> c)
      Creates a class map for specific class and registers it in the cache.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • CACHEDUMP_MSG

        public static final java.lang.String CACHEDUMP_MSG
        define a public string so that it can be looked for if interested
        See Also:
        Constant Field Values

      • log

        private final org.slf4j.Logger log
        Class logger

      • classMapCache

        private final java.util.Map<java.lang.Class<?>,​ClassMap> classMapCache
        Holds the method maps for the classes we know about. Map: Class --> ClassMap object.

      • classFieldMapCache

        private final java.util.Map<java.lang.Class<?>,​ClassFieldMap> classFieldMapCache
        Holds the field maps for the classes we know about. Map: Class --> ClassFieldMap object.

      • classNameCache

        private final java.util.Set<java.lang.String> classNameCache
        Keep the names of the classes in another map. This is needed for a multi-classloader environment where it is possible to have Class 'Foo' loaded by a classloader and then get asked to introspect on 'Foo' from another class loader. While these two Class objects have the same name, a classMethodMaps.get(Foo.class) will return null. For that case, we keep a set of class names to recognize this case.

    • Constructor Detail

      • IntrospectorCache

        public IntrospectorCache​(org.slf4j.Logger log,
                         TypeConversionHandler conversionHandler)
        C'tor
        Parameters:
        log - logger.
        conversionHandler - conversion handler

    • Method Detail

      • clear

        public void clear()
        Clears the internal cache.

      • get

        public ClassMap get​(java.lang.Class<?> c)
        Lookup a given Class object in the cache. If it does not exist, check whether this is due to a class change and purge the caches eventually.
        Parameters:
        c - The class to look up.
        Returns:
        A ClassMap object or null if it does not exist in the cache.

      • getFieldMap

        public ClassFieldMap getFieldMap​(java.lang.Class<?> c)
        Lookup a given Class object in the cache. If it does not exist, check whether this is due to a class change and purge the caches eventually.
        Parameters:
        c - The class to look up.
        Returns:
        A ClassFieldMap object or null if it does not exist in the cache.

      • put

        public ClassMap put​(java.lang.Class<?> c)
        Creates a class map for specific class and registers it in the cache. Also adds the qualified name to the name->class map for later Classloader change detection.
        Parameters:
        c - The class for which the class map gets generated.
        Returns:
        A ClassMap object.