com.pjaol.ESB.formatters.JSONFormatter.java Source code

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Here is the source code for com.pjaol.ESB.formatters.JSONFormatter.java

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/*******************************************************************************
 * Copyright 2012 Patrick O'Leary
 * 
 * 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 com.pjaol.ESB.formatters;

import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import org.apache.solr.common.util.NamedList;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;

public class JSONFormatter extends Formatter {

    @Override
    public String toOutput(NamedList output) {

        return iterateNamedList(output);
    }

    private String iterateNamedList(NamedList output) {
        JSONObject jo = new JSONObject();
        int sz = output.size();

        for (int i = 0; i < sz; i++) {
            String k = output.getName(i);

            Object v = output.getVal(i);

            if (v instanceof NamedList) {

                jo.put(k, recurseNamedList((NamedList) v));
            } else {
                jo.put(k, v);
            }
        }

        return jo.toJSONString();
    }

    private JSONArray recurseNamedList(NamedList output) {

        int sz = output.size();
        JSONArray jarr = new JSONArray();

        for (int i = 0; i < sz; i++) {
            JSONObject jo = new JSONObject();

            String k = output.getName(i);

            Object v = output.getVal(i);

            if (v instanceof NamedList) {

                jo.put(k, recurseNamedList((NamedList) v));
            } else if (v instanceof Map) {
                jo.put(k, recurseMap((Map) v));
            } else {
                jo.put(k, v);
            }
            jarr.add(jo);

        }

        return jarr;
    }

    private JSONObject recurseMap(Map items) {
        JSONObject jo = new JSONObject();

        Set keys = items.keySet();
        Iterator i = keys.iterator();
        while (i.hasNext()) {

            String k = (String) i.next();
            Object v = items.get(k);

            if (v instanceof NamedList) {
                jo.put(k, recurseNamedList((NamedList) v));
            } else if (v instanceof Map) {
                jo.put(k, recurseMap((Map) v));
            } else {
                jo.put(k, v);
            }
        }

        return jo;

    }
}