Java tutorial
/** * CommonConnection.java * Author: Francesco Rosso (rosso@eurix.it) * * This file is part of PrestoPRIME Preservation Platform (P4). * * Copyright (C) 2009-2012 EURIX Srl, Torino, Italy * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package eu.prestoprime.p4gui.connection; import it.eurix.archtools.workflow.plugin.WfPlugin; import it.eurix.archtools.workflow.plugin.WfPlugin.WfService; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.lang.annotation.Annotation; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpRequestBase; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import eu.prestoprime.p4gui.model.P4Service; import eu.prestoprime.p4gui.services.auth.RoleManager.USER_ROLE; public abstract class CommonConnection { public static String getVersion(P4Service service) { String path = service.getURL() + "/version"; try { P4HttpClient client = new P4HttpClient(service.getUserID()); HttpRequestBase request = new HttpGet(path); HttpResponse response = client.executeRequest(request); HttpEntity entity = response.getEntity(); BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent())); String line; if ((line = reader.readLine()) != null) { return line; } } catch (Exception e) { e.printStackTrace(); } return null; } public static USER_ROLE getUserRole(P4Service service) { String path = service.getURL() + "/checkrole"; try { P4HttpClient client = new P4HttpClient(service.getUserID()); HttpRequestBase request = new HttpGet(path); HttpResponse response = client.executeRequest(request); HttpEntity entity = response.getEntity(); BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent())); String line; if ((line = reader.readLine()) != null) { try { return USER_ROLE.valueOf(line); } catch (IllegalArgumentException e) { e.printStackTrace(); return USER_ROLE.guest; } } } catch (Exception e) { e.printStackTrace(); } return USER_ROLE.guest; } public static String getTermsOfUse(P4Service service, String role) { String path = service.getURL() + "/terms/" + role; StringBuffer result = new StringBuffer(); try { P4HttpClient client = new P4HttpClient(service.getUserID()); HttpRequestBase request = new HttpGet(path); HttpResponse response = client.executeRequest(request); HttpEntity entity = response.getEntity(); BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent())); String line; while ((line = reader.readLine()) != null) { result.append(line); } } catch (Exception e) { e.printStackTrace(); } return result.toString(); } public static List<String> getAvailableFileList(P4Service service) throws ConnectionException { List<String> fileList = new ArrayList<>(); String path = service.getURL() + "/filelist"; try { P4HttpClient client = new P4HttpClient(service.getUserID()); HttpRequestBase request = new HttpGet(path); HttpResponse response = client.executeRequest(request); if (response.getStatusLine().getStatusCode() == 200) { HttpEntity entity = response.getEntity(); if (entity != null) { BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent())); String line; while ((line = reader.readLine()) != null) if (!line.contains("Thumbs.db")) { fileList.add(line); } return fileList; } } } catch (IOException e) { e.printStackTrace(); } throw new ConnectionException("Error listings files..."); } public static Map<WfPlugin, Set<WfService>> getAvailablePlugins(P4Service service) throws ConnectionException { Map<WfPlugin, Set<WfService>> plugins = new HashMap<>(); String path = service.getURL() + "/pluginlist"; try { P4HttpClient client = new P4HttpClient(service.getUserID()); HttpRequestBase request = new HttpGet(path); HttpResponse response = client.executeRequest(request); if (response.getStatusLine().getStatusCode() == 200) { HttpEntity entity = response.getEntity(); if (entity != null && entity.getContent() != null) { BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent())); StringBuffer sb = new StringBuffer(); String line; while ((line = reader.readLine()) != null) { sb.append(line.trim()); } JSONObject json = new JSONObject(sb.toString()); Iterator<String> it = json.keys(); while (it.hasNext()) { final String pluginName = it.next(); WfPlugin plugin = new WfPlugin() { @Override public Class<? extends Annotation> annotationType() { return WfPlugin.class; } @Override public String name() { return pluginName; } }; Set<WfService> tasks = new HashSet<>(); JSONArray jTasks = json.getJSONArray(pluginName); for (int i = 0; i < jTasks.length(); i++) { JSONObject jTask = jTasks.getJSONObject(i); final String taskService = jTask.getString("service"); final String taskVersion = jTask.getString("version"); WfService task = new WfService() { @Override public Class<? extends Annotation> annotationType() { return WfService.class; } @Override public String version() { return taskVersion; } @Override public String name() { return taskService; } }; tasks.add(task); } plugins.put(plugin, tasks); } return plugins; } } } catch (IOException e) { e.printStackTrace(); } catch (JSONException e) { e.printStackTrace(); } throw new ConnectionException("Error listing plugins..."); } }