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/**
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* Copyright: 2013 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat.common.query;
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import java.util.List;
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import org.dataone.configuration.Settings;
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/**
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* A class represents the enable query engine type in the metacat
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* @author tao
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*
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*/
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public class EnabledQueryEngines {
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public static final String PATHQUERYENGINE = "pathquery";
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public static final String SOLRENGINE = "solr";
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private static final String ENABLED_ENGINES_PATH = "dbquery.enabledEngines";
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private static EnabledQueryEngines enabledEnginesObj = null;
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private List<String> enabledEngines = null;
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/*
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* Constructor. Read the enabled engines from the property file
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*/
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private EnabledQueryEngines() {
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enabledEngines = Settings.getConfiguration().getList(ENABLED_ENGINES_PATH);
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}
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/**
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* Get the singleton instance
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* @return
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*/
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public static EnabledQueryEngines getInstance() {
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if(enabledEnginesObj ==null) {
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enabledEnginesObj = new EnabledQueryEngines();
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}
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return enabledEnginesObj;
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}
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/**
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* Get the list of enabled engines.
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* @return an empty list will be returned if there are no enabled engines.
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*/
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public List<String> getEnabled() {
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return this.enabledEngines;
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}
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/**
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* If the the specified engine name is enabled. The name is not case sensitive.
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* @param engine the specified engine name.
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* @return true if the specified name is enabled.
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*/
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public boolean isEnabled(String engine) {
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boolean enabled = false;
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if(engine != null && !engine.trim().equals("") && enabledEngines != null) {
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for(String name : enabledEngines) {
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if(name != null && name.equalsIgnoreCase(engine)) {
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enabled = true;
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break;
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}
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}
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}
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return enabled;
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}
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}
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