Metacat

 * Generate a pathquery document representing a metacat query for a list of 

public class DocumentIdQuery

{

    /**

     * Create an squery parameters table using an already-initialized hashtable

     * 

     * @param docidList an array of document identifiers to search for

     * @param params the hashtable to add the query parameters to.

     * 

     */

    public static Hashtable createDocidQueryParams(String[] docidList, Hashtable params)

    {

        params = getDefaultQueryParams();

        if (docidList != null) {

            params.put("/eml/@packageId", docidList);

        }

        return params;

    }

    /**

     * Create an squery using some preset values for the query parameters, only

     * passing in the document ids to be searched.

     * 

     * @param docidList an array of document identifiers to search for

     */

    public static String createDocidQuery(String[] docidList) throws PropertyNotFoundException

    {

        String pathQuery = "";

        Hashtable params = getDefaultQueryParams();

        if (docidList != null) {

            params.put("/eml/@packageId", docidList);

        }

        pathQuery = DBQuery.createSQuery(params);

        return pathQuery;

    }

    /**

     * Create a paramter list containing default parameters for a query

     * 

     * @return Hashtable containing the default parameters

     */

    public static Hashtable getDefaultQueryParams()

    {

        Hashtable params = new Hashtable();

        String[] operator = new String[1];

        operator[0] = "UNION";

        params.put("operator", operator);

        String[] doctypes = new String[5];

        doctypes[0] = "eml://ecoinformatics.org/eml-2.0.1";

        doctypes[1] = "eml://ecoinformatics.org/eml-2.0.0";

        doctypes[2] = "-//ecoinformatics.org//eml-dataset-2.0.0beta6//EN";

        doctypes[3] = "-//ecoinformatics.org//eml-dataset-2.0.0beta4//EN";

        doctypes[4] = "metadata";

        params.put("returndoctype", doctypes);

        String[] fields = new String[11];

        fields[0]="originator/individualName/surName";

        fields[1]="originator/individualName/givenName";

        fields[2]="creator/individualName/surName";

        fields[3]="creator/individualName/givenName";

        fields[4]="originator/organizationName";

        fields[5]="creator/organizationName";

        fields[6]="dataset/title";

        fields[7]="keyword";

        fields[8]="idinfo/citation/citeinfo/title";

        fields[9]="idinfo/citation/citeinfo/origin";

        fields[10]="idinfo/keywords/theme/themekey";

        params.put("returnfield", fields);

        return params;

    }

    /**

     * Main method used for testing the class output

     * 

     * @param args no arguments used in this main method

     */

    public static void main(String[] args)

    {

        String CONFIG_DIR = "lib";

        File dirPath = new File(CONFIG_DIR);

        try {

        	PropertyService.getInstance(dirPath.getPath());

        } catch (ServiceException ioe) {

            System.err.println("Error in loading properties: "

                    + ioe.getMessage());

        }

        String[] ids = new String[3];

        ids[0] = "ces_dataset.23.1";

        ids[1] = "knb-lter-vcr.97.1";

        ids[2] = "obfs.400.1";

        String pathquery = null;

        try {

        	pathquery = createDocidQuery(ids);

        } catch (PropertyNotFoundException pnfe) {

        	System.out.println("Could not create doc id query: " + pnfe.getMessage());

        }

        System.out.println(pathquery);

    }