Examples of org.apache.commons.jexl2.internal.introspection.MethodKey

Package org.apache.commons.jexl2.internal.introspection

Examples of org.apache.commons.jexl2.internal.introspection.MethodKey

org.apache.commons.jexl2.internal.introspection.MethodKey
A method key usable by the introspector cache.
This stores a method (or class) name and parameters.

This replaces the original key scheme which used to build the key by concatenating the method name and parameters class names as one string with the exception that primitive types were converted to their object class equivalents.

The key is still based on the same information, it is just wrapped in an object instead. Primitive type classes are converted to they object equivalent to make a key; int foo(int) and int foo(Integer) do generate the same key.
A key can be constructed either from arguments (array of objects) or from parameters (array of class). Roughly 3x faster than string key to access the map & uses less memory. For the parameters methods: @author Jason van Zyl @author Bob McWhirter @author Christoph Reck @author Geir Magnusson Jr. @author Attila Szegedi @author Nathan Bubna

    /** the list of keys we generated & test against */
    private static final MethodKey[] keyList;
    
    /** Creates & inserts a key into the byKey & byString map */
    private static void setUpKey(String name, Class<?>[] parms) {
        MethodKey key = new MethodKey(name, parms);
        String str = key.toString();
        byKey.put(key, str);
        byString.put(str, key);
        
    }

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    }
    
    /** Checks that a string key does exist */
    void checkStringKey(String method, Class<?>... params) {
        String key = makeStringKey(method, params);
        MethodKey out = byString.get(key);
        assertTrue(out != null);
    }

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        assertTrue(out != null);
    }
        
    /** Builds a method key */
    MethodKey makeKey(String method, Class<?>... params) {
        return new MethodKey(method, params);
    }

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        return new MethodKey(method, params);
    }
    
    /** Checks that a method key exists */
    void checkKey(String method, Class<?>... params) {
        MethodKey key = makeKey(method, params);
        String out = byKey.get(key);
        assertTrue(out != null);
    }

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        assertTrue(out != null);
    }
    
    public void testObjectKey() throws Exception {
        for(int k = 0; k < keyList.length; ++k) {
            MethodKey ctl = keyList[k];
            MethodKey key = makeKey(ctl.getMethod(), ctl.getParameters());
            String out = byKey.get(key);
            assertTrue(out != null);
            assertTrue(ctl.toString() + " != " + out, ctl.toString().equals(out));
        }

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    }
    
    public void testStringKey() throws Exception {
        for(int k = 0; k < keyList.length; ++k) {
            MethodKey ctl = keyList[k];
            String key = makeStringKey(ctl.getMethod(), ctl.getParameters());
            MethodKey out = byString.get(key);
            assertTrue(out != null);
            assertTrue(ctl.toString() + " != " + key, ctl.equals(out));
        }
        
    }

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    private static final int LOOP = 3;//00;
    
    public void testPerfKey() throws Exception {
        for(int l = 0; l < LOOP; ++l)
        for(int k = 0; k < keyList.length; ++k) {
            MethodKey ctl = keyList[k];
            MethodKey key = makeKey(ctl.getMethod(), ctl.getParameters());
            String out = byKey.get(key);
            assertTrue(out != null);
        }
    }

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    }
    
    public void testPerfString() throws Exception {
        for(int l = 0; l < LOOP; ++l)
        for(int k = 0; k < keyList.length; ++k) {
            MethodKey ctl = keyList[k];
            String key = makeStringKey(ctl.getMethod(), ctl.getParameters());
            MethodKey out = byString.get(key);
            assertTrue(out != null);
        }
    }

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    }


    /** {@inheritDoc} */
    @Override
    public Object tryExecute(String name, Object obj, Object[] args) {
        MethodKey tkey = new MethodKey(name, args);
        // let's assume that invocation will fly if the declaring class is the
        // same and arguments have the same type
        if (objectClass.equals(obj.getClass()) && tkey.equals(key)) {
            try {
                return execute(obj, args);
            } catch (InvocationTargetException xinvoke) {
                return TRY_FAILED; // fail
            } catch (IllegalAccessException xill) {

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     * @return a filled up parameter (may contain a null method)
     */
    private static Parameter discover(Introspector is,
            Object obj, String method, Object[] args) {
        final Class<?> clazz = obj.getClass();
        final MethodKey key = new MethodKey(method, args);
        java.lang.reflect.Method m = is.getMethod(clazz, key);
        if (m == null && clazz.isArray()) {
            // check for support via our array->list wrapper
            m = is.getMethod(ArrayListWrapper.class, key);
        }

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