73 lines
2.5 KiB
Java
73 lines
2.5 KiB
Java
/****************************************************************************
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* This software is part of the gCube Project.
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* Site: http://www.gcube-system.org/
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****************************************************************************
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* The gCube/gCore software is licensed as Free Open Source software
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* conveying to the EUPL (http://ec.europa.eu/idabc/eupl).
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* The software and documentation is provided by its authors/distributors
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* "as is" and no expressed or
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* implied warranty is given for its use, quality or fitness for a
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* particular case.
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****************************************************************************
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* Filename: QueryLoader.java
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****************************************************************************
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* @author <a href="mailto:daniele.strollo@isti.cnr.it">Daniele Strollo</a>
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***************************************************************************/
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package org.gcube.portlets.admin.resourcesweeper.server.queries;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.util.HashMap;
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import org.gcube.common.core.utils.logging.GCUBEClientLog;
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/**
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* Support utility to load at runtime the customized queries to submit to
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* the IS.
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* @author Daniele Strollo (ISTI-CNR)
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*/
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public class QueryLoader {
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private static final HashMap<QueryLocation, String> cachedQueries = new HashMap<QueryLocation, String>();
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private static GCUBEClientLog _log = new GCUBEClientLog(QueryLoader.class);
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/**
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* @param query the location of query file to load
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* @return the string consisting of the xquery to submit to the server
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* @throws Exception
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*/
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public static String getQuery(final QueryLocation query) throws Exception {
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if (query == null) {
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throw new Exception("Invalid query parameter. Null not allowed.");
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}
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_log.trace("loading " + query.name());
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if (query != null && cachedQueries.containsKey(query)) {
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return cachedQueries.get(query);
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}
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BufferedReader in = new BufferedReader(new InputStreamReader(query.getFileName()));
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StringBuilder retval = new StringBuilder();
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String currLine = null;
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while ((currLine = in.readLine()) != null) {
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// a comment
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if (currLine.trim().length() > 0 && currLine.trim().startsWith("#")) {
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continue;
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}
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if (currLine.trim().length() == 0) { continue; }
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retval.append(currLine + System.getProperty("line.separator"));
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}
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in.close();
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String tmp = retval.toString();
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if (cachedQueries != null) {
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cachedQueries.put(query, tmp);
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}
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return tmp;
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}
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}
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