src/main/java/org/apache/sling/feature/io/json/ConfigurationJSONWriter.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership. The ASF
 * licenses this file to You 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 org.apache.sling.feature.io.json;

import java.io.IOException;
import java.io.Writer;
import java.util.Collections;
import java.util.Hashtable;

import org.apache.felix.cm.json.io.ConfigurationResource;
import org.apache.felix.cm.json.io.ConfigurationWriter;
import org.apache.sling.feature.Configuration;
import org.apache.sling.feature.Configurations;

/** JSON writer for configurations */
public class ConfigurationJSONWriter {

    /** Writes the configurations to the writer. The writer is not closed.
     *
     * @param writer Writer
     * @param configs List of configurations
     * @throws IOException If writing fails */
    public static void write(final Writer writer, final Configurations configs)
            throws IOException {
        final ConfigurationJSONWriter w = new ConfigurationJSONWriter();
        w.writeConfigurations(writer, configs);
    }

    private void writeConfigurations(final Writer writer, final Configurations configs)
            throws IOException {

        final ConfigurationWriter cfgWriter = org.apache.felix.cm.json.io.Configurations
            .buildWriter()
            .build(writer);

        final ConfigurationResource rsrc = new ConfigurationResource();
        for(final Configuration cfg : configs) {
            final Hashtable<String, Object> properties;
            if ( cfg.getProperties() instanceof Hashtable && cfg.getProperties().get(Configuration.PROP_ARTIFACT_ID) == null ) {
                properties = (Hashtable<String, Object>)cfg.getProperties();
            } else {
                properties = org.apache.felix.cm.json.io.Configurations.newConfiguration();
                for(final String name : Collections.list(cfg.getProperties().keys()) ) {
                    if ( !Configuration.PROP_ARTIFACT_ID.equals(name) ) {
                        properties.put(name, cfg.getProperties().get(name));
                    }
                }
            }
            rsrc.getConfigurations().put(cfg.getPid(), properties);
        }
        cfgWriter.writeConfigurationResource(rsrc);
    }


}