1 | /*
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2 | * Copyright 2005 Paul Hinds
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | */
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16 | package org.tp23.antinstaller.runtime.exe;
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17 |
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18 | import java.io.BufferedReader;
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19 | import java.io.IOException;
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20 | import java.io.InputStream;
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21 | import java.io.InputStreamReader;
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22 | import java.util.ArrayList;
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23 | import java.util.List;
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24 |
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25 | import org.tp23.antinstaller.InstallException;
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26 | import org.tp23.antinstaller.InstallerContext;
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27 |
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28 |
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29 | /**
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30 | * Loads FilterChains from resource files on the classpath with lists of class
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31 | * names listed in order. In the files lines starting with # and blank
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32 | * lines are ignored
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33 | * @author Paul Hinds
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34 | * @version $Id: FilterFactory.java,v 1.4 2007/01/04 22:57:18 teknopaul Exp $
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35 | */
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36 | public class FilterFactory {
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37 |
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38 | public static final String FILTER_RESOURCE = "/antinstall-config.fconfig";
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39 |
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40 | private FilterFactory() {
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41 | }
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42 |
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43 | public static FilterChain factory(String configResource) throws InstallException{
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44 | try {
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45 | InputStream is = FilterFactory.class.getResourceAsStream(configResource);
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46 | BufferedReader br = new BufferedReader(new InputStreamReader(is));
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47 | String filterClass = null;
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48 | final List filterChain = new ArrayList();
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49 | while((filterClass = br.readLine())!=null){
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50 | if(filterClass.startsWith("#"))continue;
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51 | filterClass = filterClass.trim();
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52 | if(filterClass.equals("")){
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53 | continue;
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54 | }
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55 | filterChain.add( Class.forName(filterClass).newInstance() );
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56 | }
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57 | br.close();
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58 | return new DynamicFilterChain(configResource, filterChain);
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59 | }
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60 | catch (IOException e) {
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61 | e.printStackTrace();
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62 | }
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63 | catch (Exception e) {
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64 | e.printStackTrace();
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65 | }
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66 | throw new InstallException("Can not create FilterChain");
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67 | }
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68 |
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69 | static class DynamicFilterChain implements FilterChain{
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70 |
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71 | private ExecuteFilter[] filters;
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72 | private String configResource;
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73 |
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74 | private DynamicFilterChain(String configResource, List filterChain){
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75 | this.configResource = configResource;
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76 | filters = new ExecuteFilter[filterChain.size()];
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77 | filterChain.toArray(filters);
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78 | }
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79 | public void init(InstallerContext ctx){
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80 | ctx.setConfigResource(configResource);
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81 | }
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82 | public ExecuteFilter[] getFilters(){
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83 | return filters;
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84 | }
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85 | };
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86 | }
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