Examples with PropertyAccessor ognl.PropertyAccessor used on opensource projects

Example 1 with PropertyAccessor

use of ognl.PropertyAccessor in project thymeleaf by thymeleaf.

the class OGNLShortcutExpression method evaluate.

Object evaluate(final IEngineConfiguration configuration, final Map<String, Object> context, final Object root) throws Exception {
    final ICacheManager cacheManager = configuration.getCacheManager();
    final ICache<ExpressionCacheKey, Object> expressionCache = (cacheManager == null ? null : cacheManager.getExpressionCache());
    Object target = root;
    for (final String propertyName : this.expressionLevels) {
        // If target is null, we will mimic what OGNL does in these cases...
        if (target == null) {
            throw new OgnlException("source is null for getProperty(null, \"" + propertyName + "\")");
        }
        // For the best integration possible, we will ask OGNL which property accessor it would use for
        // this target object, and then depending on the result apply our equivalent or just default to
        // OGNL evaluation if it is a custom property accessor we do not implement.
        final Class<?> targetClass = OgnlRuntime.getTargetClass(target);
        final PropertyAccessor ognlPropertyAccessor = OgnlRuntime.getPropertyAccessor(targetClass);
        // Depending on the returned OGNL property accessor, we will try to apply ours
        if (target instanceof Class<?>) {
            // Because of the way OGNL works, the "OgnlRuntime.getTargetClass(...)" of a Class object is the class
            // object itself, so we might be trying to apply a PropertyAccessor to a Class instead of a real object,
            // something we avoid by means of this shortcut
            target = getObjectProperty(expressionCache, propertyName, target);
        } else if (OGNLContextPropertyAccessor.class.equals(ognlPropertyAccessor.getClass())) {
            target = getContextProperty(propertyName, context, target);
        } else if (ObjectPropertyAccessor.class.equals(ognlPropertyAccessor.getClass())) {
            target = getObjectProperty(expressionCache, propertyName, target);
        } else if (MapPropertyAccessor.class.equals(ognlPropertyAccessor.getClass())) {
            target = getMapProperty(propertyName, (Map<?, ?>) target);
        } else if (ListPropertyAccessor.class.equals(ognlPropertyAccessor.getClass())) {
            target = getListProperty(expressionCache, propertyName, (List<?>) target);
        } else if (SetPropertyAccessor.class.equals(ognlPropertyAccessor.getClass())) {
            target = getSetProperty(expressionCache, propertyName, (Set<?>) target);
        } else if (IteratorPropertyAccessor.class.equals(ognlPropertyAccessor.getClass())) {
            target = getIteratorProperty(expressionCache, propertyName, (Iterator<?>) target);
        } else if (EnumerationPropertyAccessor.class.equals(ognlPropertyAccessor.getClass())) {
            target = getEnumerationProperty(expressionCache, propertyName, (Enumeration<?>) target);
        } else if (ArrayPropertyAccessor.class.equals(ognlPropertyAccessor.getClass())) {
            target = getArrayProperty(expressionCache, propertyName, (Object[]) target);
        } else {
            // default to normal OGNL evaluation.
            throw new OGNLShortcutExpressionNotApplicableException();
        }
    }
    return target;
}