SimpleProperty.java

/**************************************************************************************
 * Copyright (C) 2008 EsperTech, Inc. All rights reserved.                            *
 * http://esper.codehaus.org                                                          *
 * http://www.espertech.com                                                           *
 * ---------------------------------------------------------------------------------- *
 * The software in this package is published under the terms of the GPL license       *
 * a copy of which has been included with this distribution in the license.txt file.  *
 **************************************************************************************/
package com.espertech.esper.event.property;

import com.espertech.esper.client.EventPropertyGetter;
import com.espertech.esper.client.EventType;
import com.espertech.esper.client.PropertyAccessException;
import com.espertech.esper.event.EventAdapterService;
import com.espertech.esper.event.EventPropertyType;
import com.espertech.esper.event.EventTypeUtility;
import com.espertech.esper.event.arr.ObjectArrayEventPropertyGetter;
import com.espertech.esper.event.arr.ObjectArrayEventType;
import com.espertech.esper.event.arr.ObjectArrayPropertyGetterDefaultObjectArray;
import com.espertech.esper.event.bean.BeanEventType;
import com.espertech.esper.event.bean.InternalEventPropDescriptor;
import com.espertech.esper.event.map.MapEventPropertyGetter;
import com.espertech.esper.event.map.MapEventType;
import com.espertech.esper.event.map.MapPropertyGetterDefaultNoFragment;
import com.espertech.esper.event.xml.*;

import java.io.StringWriter;
import java.util.Map;

/**
 * Represents a simple property of a given name.
 */
public class SimpleProperty extends PropertyBase
{
    /**
     * Ctor.
     * @param propertyName is the property name
     */
    public SimpleProperty(String propertyName)
    {
        super(propertyName);
    }

    public String[] toPropertyArray()
    {
        return new String[] {this.getPropertyNameAtomic()};
    }    

    public EventPropertyGetter getGetter(BeanEventType eventType, EventAdapterService eventAdapterService)
    {
        InternalEventPropDescriptor propertyDesc = eventType.getSimpleProperty(propertyNameAtomic);
        if (propertyDesc == null)
        {
            return null;
        }
        if (!propertyDesc.getPropertyType().equals(EventPropertyType.SIMPLE))
        {
            return null;
        }
        return eventType.getGetter(propertyNameAtomic);
    }

    public Class getPropertyType(BeanEventType eventType, EventAdapterService eventAdapterService)
    {
        InternalEventPropDescriptor propertyDesc = eventType.getSimpleProperty(propertyNameAtomic);
        if (propertyDesc == null)
        {
            return null;
        }
        return propertyDesc.getReturnType();
    }

    public GenericPropertyDesc getPropertyTypeGeneric(BeanEventType eventType, EventAdapterService eventAdapterService)
    {
        InternalEventPropDescriptor propertyDesc = eventType.getSimpleProperty(propertyNameAtomic);
        if (propertyDesc == null)
        {
            return null;
        }
        return propertyDesc.getReturnTypeGeneric();
    }

    public Class getPropertyTypeMap(Map optionalMapPropTypes, EventAdapterService eventAdapterService)
    {
        // The simple, none-dynamic property needs a definition of the map contents else no property
        if (optionalMapPropTypes == null)
        {
            return null;
        }
        Object def = optionalMapPropTypes.get(propertyNameAtomic);
        if (def == null)
        {
            return null;
        }
        if (def instanceof Class)
        {
            return (Class) def;
        }
        else if (def instanceof Map)
        {
            return Map.class;
        }
        else if (def instanceof String)
        {
            String propertyName = def.toString();
            boolean isArray = EventTypeUtility.isPropertyArray(propertyName);
            if (isArray) {
                propertyName = EventTypeUtility.getPropertyRemoveArray(propertyName);
            }

            EventType eventType = eventAdapterService.getExistsTypeByName(propertyName);
            if (eventType instanceof MapEventType)
            {
                if (isArray)
                {
                    return Map[].class;
                }
                else
                {
                    return Map.class;
                }
            }
            if (eventType instanceof ObjectArrayEventType)
            {
                if (isArray)
                {
                    return Object[][].class;
                }
                else
                {
                    return Object[].class;
                }
            }
        }
        String message = "Nestable map type configuration encountered an unexpected value type of '"
            + def.getClass() + " for property '" + propertyNameAtomic + "', expected Map or Class";
        throw new PropertyAccessException(message);
    }

    public MapEventPropertyGetter getGetterMap(Map optionalMapPropTypes, EventAdapterService eventAdapterService)
    {
        // The simple, none-dynamic property needs a definition of the map contents else no property
        if (optionalMapPropTypes == null)
        {
            return null;
        }
        Object def = optionalMapPropTypes.get(propertyNameAtomic);
        if (def == null)
        {
            return null;
        }
        return new MapPropertyGetterDefaultNoFragment(propertyNameAtomic, eventAdapterService);
    }

    public void toPropertyEPL(StringWriter writer)
    {
        writer.append(propertyNameAtomic);
    }

    public EventPropertyGetter getGetterDOM()
    {
        return new DOMAttributeAndElementGetter(propertyNameAtomic);
    }

    public EventPropertyGetter getGetterDOM(SchemaElementComplex complexProperty, EventAdapterService eventAdapterService, BaseXMLEventType xmlEventType, String propertyExpression)
    {
        for (SchemaItemAttribute attribute : complexProperty.getAttributes())
        {
            if (attribute.getName().equals(propertyNameAtomic))
            {
                return new DOMSimpleAttributeGetter(propertyNameAtomic);
            }
        }

        for (SchemaElementSimple simple : complexProperty.getSimpleElements())
        {
            if (simple.getName().equals(propertyNameAtomic))
            {
                return new DOMComplexElementGetter(propertyNameAtomic, null, simple.isArray());
            }
        }

        for (SchemaElementComplex complex : complexProperty.getChildren())
        {
            FragmentFactoryDOMGetter complexFragmentFactory = new FragmentFactoryDOMGetter(eventAdapterService, xmlEventType, propertyExpression);
            if (complex.getName().equals(propertyNameAtomic))
            {
                return new DOMComplexElementGetter(propertyNameAtomic, complexFragmentFactory, complex.isArray());
            }
        }

        return null;
    }

    public SchemaItem getPropertyTypeSchema(SchemaElementComplex complexProperty, EventAdapterService eventAdapterService)
    {
        return SchemaUtil.findPropertyMapping(complexProperty, propertyNameAtomic);
    }

    public boolean isDynamic()
    {
        return false;
    }

    public ObjectArrayEventPropertyGetter getGetterObjectArray(Map<String, Integer> indexPerProperty, Map<String, Object> nestableTypes, EventAdapterService eventAdapterService) {
        // The simple, none-dynamic property needs a definition of the map contents else no property
        if (nestableTypes == null)
        {
            return null;
        }
        Integer propertyIndex = indexPerProperty.get(propertyNameAtomic);
        if (propertyIndex == null) {
            return null;
        }
        return new ObjectArrayPropertyGetterDefaultObjectArray(propertyIndex, null, eventAdapterService);
    }
}