net.logstash.logback.composite.AbstractNestedJsonProvider.java Source code

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Here is the source code for net.logstash.logback.composite.AbstractNestedJsonProvider.java

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/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.logstash.logback.composite;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonGenerator;

import ch.qos.logback.access.spi.IAccessEvent;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.spi.DeferredProcessingAware;

/**
 * A {@link JsonProvider} that nests other providers within a subobject.
 * 
 * @param <Event> type of event ({@link ILoggingEvent} or {@link IAccessEvent}).
 */
public abstract class AbstractNestedJsonProvider<Event extends DeferredProcessingAware>
        extends AbstractFieldJsonProvider<Event> {

    public static final String FIELD_NESTED = "nested";

    /**
     * The providers that are used to populate the output nested JSON object.
     */
    private JsonProviders<Event> jsonProviders = new JsonProviders<Event>();

    public AbstractNestedJsonProvider() {
        setFieldName(FIELD_NESTED);
    }

    @Override
    public void writeTo(JsonGenerator generator, Event event) throws IOException {
        generator.writeFieldName(getFieldName());
        generator.writeStartObject();
        jsonProviders.writeTo(generator, event);
        generator.writeEndObject();
    }

    public JsonProviders<Event> getProviders() {
        return jsonProviders;
    }

    public void setProviders(JsonProviders<Event> jsonProviders) {
        this.jsonProviders = jsonProviders;
    }
}