org.ldaptive.io.JsonReader.java Source code

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Here is the source code for org.ldaptive.io.JsonReader.java

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/* See LICENSE for licensing and NOTICE for copyright. */
package org.ldaptive.io;

import java.io.IOException;
import java.io.Reader;
import java.util.List;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.ldaptive.LdapAttribute;
import org.ldaptive.LdapEntry;
import org.ldaptive.SearchResult;
import org.ldaptive.SortBehavior;

/**
 * Reads JSON from a {@link Reader} and returns a {@link SearchResult}.
 *
 * @author  Middleware Services
 */
public class JsonReader implements SearchResultReader {

    /** Reader to read from. */
    private final Reader jsonReader;

    /** Sort behavior. */
    private final SortBehavior sortBehavior;

    /**
     * Creates a new json reader.
     *
     * @param  reader  to read JSON from
     */
    public JsonReader(final Reader reader) {
        this(reader, SortBehavior.getDefaultSortBehavior());
    }

    /**
     * Creates a new json reader.
     *
     * @param  reader  to read JSON from
     * @param  sb  sort behavior of the search result
     */
    public JsonReader(final Reader reader, final SortBehavior sb) {
        jsonReader = reader;
        if (sb == null) {
            throw new IllegalArgumentException("Sort behavior cannot be null");
        }
        sortBehavior = sb;
    }

    /**
     * Reads JSON data from the reader and returns a search result.
     *
     * @return  search result derived from the JSON
     *
     * @throws  IOException  if an error occurs using the reader
     */
    @Override
    @SuppressWarnings("unchecked")
    public SearchResult read() throws IOException {
        final SearchResult result = new SearchResult(sortBehavior);
        try {
            final JSONParser parser = new JSONParser();
            final JSONArray jsonArray = (JSONArray) parser.parse(jsonReader);
            for (Object o : jsonArray) {
                final LdapEntry entry = new LdapEntry(sortBehavior);
                final JSONObject jsonObject = (JSONObject) o;
                for (Object k : jsonObject.keySet()) {
                    final String attrName = (String) k;
                    if ("dn".equalsIgnoreCase(attrName)) {
                        entry.setDn((String) jsonObject.get(k));
                    } else {
                        final LdapAttribute attr = new LdapAttribute(sortBehavior);
                        attr.setName(attrName);
                        attr.addStringValues((List<String>) jsonObject.get(k));
                        entry.addAttribute(attr);
                    }
                }
                result.addEntry(entry);
            }
        } catch (ParseException e) {
            throw new IOException(e);
        }
        return result;
    }
}