package com.espertech.esper.event.xml;
import com.espertech.esper.client.EventPropertyGetter;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.PropertyAccessException;
import com.espertech.esper.util.SimpleTypeParser;
import com.espertech.esper.util.SimpleTypeParserFactory;
import org.w3c.dom.Node;
import java.lang.reflect.Array;
/**
* Getter for converting a Node child nodes into an array.
*/
public class DOMConvertingArrayGetter implements EventPropertyGetter
{
private final DOMPropertyGetter getter;
private final Class componentType;
private final SimpleTypeParser parser;
/**
* Ctor.
* @param domPropertyGetter getter
* @param returnType component type
*/
public DOMConvertingArrayGetter(DOMPropertyGetter domPropertyGetter, Class returnType)
{
this.getter = domPropertyGetter;
this.componentType = returnType;
this.parser = SimpleTypeParserFactory.getParser(returnType);
}
public Object get(EventBean obj) throws PropertyAccessException
{
// The underlying is expected to be a map
if (!(obj.getUnderlying() instanceof Node))
{
throw new PropertyAccessException("Mismatched property getter to event bean type, " +
"the underlying data object is not of type Node");
}
Node node = (Node) obj.getUnderlying();
Node[] result = getter.getValueAsNodeArray(node);
if (result == null)
{
return null;
}
Object array = Array.newInstance(componentType, result.length);
for (int i = 0; i < result.length; i++)
{
String text = result[i].getTextContent();
if ((text == null) || (text.length() == 0))
{
continue;
}
Object parseResult = parser.parse(text);
Array.set(array, i, parseResult);
}
return array;
}
public boolean isExistsProperty(EventBean eventBean)
{
return true;
}
public Object getFragment(EventBean eventBean) throws PropertyAccessException
{
return null;
}
}