org.nordapp.web.util.StateReader.java Source code

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Here is the source code for org.nordapp.web.util.StateReader.java

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package org.nordapp.web.util;

/*
 * #%L
 * NordApp OfficeBase :: Web
 * %%
 * Copyright (C) 2014 - 2015 I.D.S. DialogSysteme GmbH
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.fileupload.ParameterParser;
import org.i3xx.step.due.service.model.ResourceService;
import org.nordapp.web.servlet.SessionControl;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

public class StateReader {

    /** The bundle context */
    private BundleContext context;

    /** The session control */
    private SessionControl ctrl;

    public StateReader(BundleContext context, SessionControl ctrl) {
        this.context = context;
        this.ctrl = ctrl;
    }

    /**
     * Reads the state file
     * 
     * @param dest The destination of the file
     * @return The list of valid states
     * @throws IOException
     */
    public List<String> getState(String dest) throws IOException {

        //Get the resource
        ServiceReference<ResourceService> rsr = context.getServiceReference(ResourceService.class);
        if (rsr == null)
            throw new IOException("The resource service is not available (maybe down or a version conflict).");

        ResourceService rs = context.getService(rsr);
        if (rs == null)
            throw new IOException("The resource service is not available (maybe down or a version conflict).");

        Map<String, String> props = new HashMap<String, String>();
        List<String> list = new ArrayList<String>();

        InputStream in = rs.getResourceAsStream(ctrl.getMandatorID(), ctrl.getGroupID(), ctrl.getArtifactID(), dest,
                ResourceService.FILE_RESOURCE, props);

        //use an input stream that supports mark.
        LineNumberReader r = new LineNumberReader(new InputStreamReader(in));
        String line = r.readLine();
        while (line != null) {
            line = line.trim();
            //skip empty lines and comments
            if (!(line.equals("") || line.startsWith("#"))) {
                list.add(line);
            }
            line = r.readLine();
        }

        return list;
    }

    /**
     * Parses a line that defines an applications RESTful state.
     * 
     * @param line The line to be parsed
     * @return The parsed line with the field-value pairs as elements of a map
     */
    public Map<String, String> parseLine(String line) {

        Map<String, String> parameters = null;
        parameters = new ParameterParser().parse(line, ';');

        return parameters;
    }

}