OsemBeanSerializer.java

package com.github.kzwang.osem.jackson;

import com.fasterxml.jackson.core.JsonGenerationException;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.BeanPropertyWriter;
import com.fasterxml.jackson.databind.ser.BeanSerializer;
import com.fasterxml.jackson.databind.ser.std.BeanSerializerBase;

import java.io.IOException;


/**
 * Override to use custom serializer for null value
 */
public class OsemBeanSerializer extends BeanSerializer {


    protected OsemBeanSerializer(BeanSerializerBase src) {
        super(src);
    }

    @Override
    protected void serializeFields(Object bean, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonGenerationException {
        final BeanPropertyWriter[] props;
        if (_filteredProps != null && provider.getActiveView() != null) {
            props = _filteredProps;
        } else {
            props = _props;
        }
        int i = 0;
        try {
            for (final int len = props.length; i < len; ++i) {

                if (props[i] != null) { // can have nulls in filtered list
                    OsemBeanPropertyWriter prop = new OsemBeanPropertyWriter(props[i]);   // override to use own property writer
                    prop.serializeAsField(bean, jgen, provider);
                }
            }
            if (_anyGetterWriter != null) {
                _anyGetterWriter.getAndSerialize(bean, jgen, provider);
            }
        } catch (Exception e) {
            String name = (i == props.length) ? "[anySetter]" : props[i].getName();
            wrapAndThrow(provider, e, bean, name);
        } catch (StackOverflowError e) {
            /* 04-Sep-2009, tatu: Dealing with this is tricky, since we do not
             *   have many stack frames to spare... just one or two; can't
             *   make many calls.
             */
            JsonMappingException mapE = new JsonMappingException("Infinite recursion (StackOverflowError)", e);
            String name = (i == props.length) ? "[anySetter]" : props[i].getName();
            mapE.prependPath(new JsonMappingException.Reference(bean, name));
            throw mapE;
        }
    }
}