Examples of com.espertech.esper.client.EventPropertyGetter

com.espertech.esper.client.EventPropertyGetter
Get property values from an event instance for a given event property. Instances that implement this interface are usually bound to a particular {@link com.espertech.esper.client.EventType} and cannotbe used to access {@link EventBean} instances of a different type.

        filterHandle = new EPStatementHandleCallback(agentInstanceContextCreateContext.getEpStatementAgentInstanceHandle(), this);


        getters = new EventPropertyGetter[partitionItem.getPropertyNames().size()];
        for (int i = 0; i < partitionItem.getPropertyNames().size(); i++) {
            String propertyName = partitionItem.getPropertyNames().get(i);
            EventPropertyGetter getter = partitionItem.getFilterSpecCompiled().getFilterForEventType().getGetter(propertyName);
            getters[i] = getter;
        }


        FilterValueSetParam[] addendum = filterAddendum != null ? filterAddendum.getFilterAddendum(partitionItem.getFilterSpecCompiled()) : null;
        FilterValueSet filterValueSet = partitionItem.getFilterSpecCompiled().getValueSet(null, null, addendum);

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    }


    public ExprIdentNodeImpl(EventType eventType, String propertyName, int streamNumber) {
        unresolvedPropertyName = propertyName;
        resolvedPropertyName = propertyName;
        EventPropertyGetter propertyGetter = eventType.getGetter(propertyName);
        if (propertyGetter == null) {
            throw new IllegalArgumentException("Ident-node constructor could not locate property " + propertyName);
        }
        Class propertyType = eventType.getPropertyType(propertyName);
        evaluator = new ExprIdentNodeEvaluatorImpl(streamNumber, propertyGetter, propertyType, this);

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        Pair<PropertyResolutionDescriptor, String> propertyInfoPair = ExprIdentNodeUtil.getTypeFromStream(validationContext.getStreamTypeService(), unescapedPropertyName, streamOrPropertyName, false);
        resolvedStreamName = propertyInfoPair.getSecond();
        int streamNum = propertyInfoPair.getFirst().getStreamNum();
        Class propertyType = propertyInfoPair.getFirst().getPropertyType();
        resolvedPropertyName = propertyInfoPair.getFirst().getPropertyName();
        EventPropertyGetter propertyGetter;
        try {
            propertyGetter = propertyInfoPair.getFirst().getStreamEventType().getGetter(resolvedPropertyName);
        }
        catch (PropertyAccessException ex) {
            throw new ExprValidationException("Property '" + unresolvedPropertyName + "' is not valid: " + ex.getMessage(), ex);

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        return revisionEventType;
    }


    public Object get(String property) throws PropertyAccessException
    {
        EventPropertyGetter getter = revisionEventType.getGetter(property);
        if (getter == null)
        {
            return null;
        }
        return getter.get(this);
    }

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            {
                return value.getObject();
            }
        }


        EventPropertyGetter getter = parameters.getBaseGetter();
        if (getter == null)
        {
            return null;  // The property was added by a delta event and only exists on a delta
        }
        if (lastBaseEvent != null) {
            return getter.get(lastBaseEvent);
        }
        return null;
    }

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        return null;
    }


    public Object getFragment(String propertyExpression)
    {
        EventPropertyGetter getter = revisionEventType.getGetter(propertyExpression);
        if (getter == null)
        {
            return null;
        }
        return getter.getFragment(this);
    }

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        return revisionEventType;
    }


    public Object get(String property) throws PropertyAccessException
    {
        EventPropertyGetter getter = revisionEventType.getGetter(property);
        if (getter == null)
        {
            return null;
        }
        return getter.get(this);
    }

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        return RevisionEventBeanDeclared.class;
    }


    public Object getFragment(String propertyExpression)
    {
        EventPropertyGetter getter = revisionEventType.getGetter(propertyExpression);
        if (getter == null)
        {
            throw new PropertyAccessException("Property named '" + propertyExpression + "' is not a valid property name for this type");
        }
        return getter.getFragment(this);
    }

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        Map<String, RevisionPropertyTypeDesc> propertyDesc = new HashMap<String, RevisionPropertyTypeDesc>();
        int count = 0;


        for (String property : spec.getChangesetPropertyNames())
        {
            EventPropertyGetter fullGetter = spec.getBaseEventType().getGetter(property);
            int propertyNumber = count;
            int[] propGroupsProperty = propsPerGroup.get(property);
            final RevisionGetterParameters parameters = new RevisionGetterParameters(property, propertyNumber, fullGetter, propGroupsProperty);


            // if there are no groups (full event property only), then simply use the full event getter
            EventPropertyGetter revisionGetter = new EventPropertyGetter() {
                    public Object get(EventBean eventBean) throws PropertyAccessException
                    {
                        RevisionEventBeanDeclared riv = (RevisionEventBeanDeclared) eventBean;
                        return riv.getVersionedValue(parameters);
                    }


                    public boolean isExistsProperty(EventBean eventBean)
                    {
                        return true;
                    }


                    public Object getFragment(EventBean eventBean)
                    {
                        return null; // fragments no provided by revision events
                    }
                };


            Class type = spec.getBaseEventType().getPropertyType(property);
            RevisionPropertyTypeDesc propertyTypeDesc = new RevisionPropertyTypeDesc(revisionGetter, parameters, type);
            propertyDesc.put(property, propertyTypeDesc);
            count++;
        }


        for (String property : spec.getBaseEventOnlyPropertyNames())
        {
            final EventPropertyGetter fullGetter = spec.getBaseEventType().getGetter(property);


            // if there are no groups (full event property only), then simply use the full event getter
            EventPropertyGetter revisionGetter =  new EventPropertyGetter() {
                public Object get(EventBean eventBean) throws PropertyAccessException
                {
                    RevisionEventBeanDeclared riv = (RevisionEventBeanDeclared) eventBean;
                    EventBean bean = riv.getLastBaseEvent();
                    if (bean == null) {
                        return null;
                    }
                    return fullGetter.get(bean);
                }


                public boolean isExistsProperty(EventBean eventBean)
                {
                    return true;
                }


                public Object getFragment(EventBean eventBean)
                {
                    return null; // fragments no provided by revision events
                }
            };


            Class type = spec.getBaseEventType().getPropertyType(property);
            RevisionPropertyTypeDesc propertyTypeDesc = new RevisionPropertyTypeDesc(revisionGetter, null, type);
            propertyDesc.put(property, propertyTypeDesc);
            count++;
        }


        count = 0;
        for (String property : spec.getKeyPropertyNames())
        {
            final int keyPropertyNumber = count;


            EventPropertyGetter revisionGetter;
            if (spec.getKeyPropertyNames().length == 1) {
                revisionGetter = new EventPropertyGetter() {
                    public Object get(EventBean eventBean) throws PropertyAccessException
                    {
                        RevisionEventBeanDeclared riv = (RevisionEventBeanDeclared) eventBean;
                        return riv.getKey();
                    }


                    public boolean isExistsProperty(EventBean eventBean)
                    {
                        return true;
                    }


                    public Object getFragment(EventBean eventBean)
                    {
                        return null;
                    }
                };
            }
            else {
                revisionGetter = new EventPropertyGetter() {
                    public Object get(EventBean eventBean) throws PropertyAccessException
                    {
                        RevisionEventBeanDeclared riv = (RevisionEventBeanDeclared) eventBean;
                        MultiKeyUntyped key = (MultiKeyUntyped) riv.getKey();
                        if (key == null) {

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            // when selecting a single property in the select clause that provides a fragment
            if (parent.subselectMultirowType == null) {
                Collection<EventBean> events = new ArrayDeque<EventBean>(matchingEvents.size());
                ExprIdentNodeEvaluator eval = (ExprIdentNodeEvaluator) parent.selectClauseEvaluator[0];
                EventPropertyGetter getter = eval.getGetter();
                for (EventBean subselectEvent : matchingEvents) {
                    Object fragment = getter.getFragment(subselectEvent);
                    if (fragment == null) {
                        continue;
                    }
                    events.add((EventBean) fragment);
                }

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