it.crs4.most.ehrlib.PriorityComparison.java Source code

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Here is the source code for it.crs4.most.ehrlib.PriorityComparison.java

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/**
 * Project MOST - Moving Outcomes to Standard Telemedicine Practice
 * http://most.crs4.it/
 *
 * Copyright 2014, CRS4 srl. (http://www.crs4.it/)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * See license-GPLv2.txt or license-MIT.txt
 */

package it.crs4.most.ehrlib;

import it.crs4.most.ehrlib.datatypes.EhrDatatype;
import it.crs4.most.ehrlib.widgets.DatatypeWidget;

import java.util.Comparator;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * Helper class for sorting widgets by priority.
 */
public class PriorityComparison implements Comparator<DatatypeWidget<EhrDatatype>> {

    /** The schema. */
    private JSONObject schema = null;

    private JSONObject aliases = null;

    /**
     * Instantiates a new priority comparison.
     *
     * @param layoutSchema the layout schema
     */
    public PriorityComparison(JSONObject layoutSchema) {
        this.schema = layoutSchema;
        this.aliases = this.schema.optJSONObject("aliases");
    }

    private JSONObject getSchemaObject(String key) throws JSONException {
        JSONObject obj = this.schema.getJSONObject("items").optJSONObject(key);
        if (obj == null)
            return this.schema.getJSONObject("items")
                    .getJSONObject((this.schema.getJSONObject("aliases").getString(key)));
        return obj;
    }

    public int compare(DatatypeWidget<EhrDatatype> item1, DatatypeWidget<EhrDatatype> item2) {

        if (this.schema == null || !this.schema.has("items"))
            return 1;
        else {
            String path1 = item1.getDatatype().getPath();
            String path2 = item2.getDatatype().getPath();

            try {
                return getSchemaObject(path1).getInt("priority") > getSchemaObject(path2).getInt("priority") ? 1
                        : -1;
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                return 1;
            }
        }
    }
}