On 14/12/2009, [email protected] <[email protected]> wrote:
> Author: henrib
> Date: Mon Dec 14 17:38:45 2009
> New Revision: 890409
>
> URL: http://svn.apache.org/viewvc?rev=890409&view=rev
> Log:
> fixed JEXL-94; modified test accordingly. Also fixed a bug in
> MethodKey#isApplicable that surfaced through test.
>
> Modified:
>
> commons/proper/jexl/trunk/src/main/java/org/apache/commons/jexl2/Interpreter.java
>
> commons/proper/jexl/trunk/src/main/java/org/apache/commons/jexl2/JexlEngine.java
>
> commons/proper/jexl/trunk/src/main/java/org/apache/commons/jexl2/internal/introspection/MethodKey.java
>
> commons/proper/jexl/trunk/src/test/java/org/apache/commons/jexl2/MethodTest.java
>
> Modified:
> commons/proper/jexl/trunk/src/main/java/org/apache/commons/jexl2/Interpreter.java
> URL:
> http://svn.apache.org/viewvc/commons/proper/jexl/trunk/src/main/java/org/apache/commons/jexl2/Interpreter.java?rev=890409&r1=890408&r2=890409&view=diff
>
> ==============================================================================
> ---
> commons/proper/jexl/trunk/src/main/java/org/apache/commons/jexl2/Interpreter.java
> (original)
> +++
> commons/proper/jexl/trunk/src/main/java/org/apache/commons/jexl2/Interpreter.java
> Mon Dec 14 17:38:45 2009
> @@ -97,6 +97,8 @@
> protected final JexlArithmetic arithmetic;
> /** The map of registered functions. */
> protected final Map<String, Object> functions;
> + /** The map of registered functions. */
> + protected Map<String, Object> functors;
Could/should be private.
Indeed so should all the other instance variables...
> /** The context to store/retrieve variables. */
> protected final JexlContext context;
> /** Strict interpreter flag. */
> @@ -124,6 +126,7 @@
> this.silent = jexl.silent;
> this.cache = jexl.cache != null;
> this.context = aContext;
> + this.functors = null;
Why not allocate an empty HashMap here?
It would save a lot of null checking later, and the variable could
then be final.
> }
>
> /**
> @@ -231,6 +234,46 @@
> return null;
> }
>
> + /**
> + * Resolves a namespace, eventually allocating an instance using
> context as constructor argument.
> + * The lifetime of such instances span the current expression or script
> evaluation.
> + *
> + * @param prefix the prefix name (may be null for global namespace)
> + * @param node the AST node
> + * @return the namespace instance
> + */
> + protected Object resolveNamespace(String prefix, JexlNode node) {
> + Object namespace;
> + // check whether this namespace is a functor
> + if (functors != null) {
> + namespace = functors.get(prefix);
> + if (namespace != null) {
> + return namespace;
> + }
> + }
> + namespace = functions.get(prefix);
> + if (namespace == null) {
> + throw new JexlException(node, "no such function namespace " +
> prefix);
> + }
> + // allow namespace to be instantiated as functor with context
> + if (namespace instanceof Class<?>) {
> + Object[] args = new Object[]{context};
> + Constructor<?> ctor = uberspect.getConstructor(namespace,args,
> node);
> + if (ctor != null) {
> + try {
> + namespace = ctor.newInstance(args);
> + if (functors == null) {
> + functors = new HashMap<String, Object>();
> + }
> + functors.put(prefix, namespace);
> + } catch (Exception xinst) {
> + throw new JexlException(node, "unable to instantiate
> namespace " + prefix, xinst);
> + }
> + }
> + }
> + return namespace;
> + }
> +
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