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1 package digilib.servlet;
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2
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3 import java.io.UnsupportedEncodingException;
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4 import java.net.URLEncoder;
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5
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6 import javax.servlet.http.HttpServletRequest;
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7
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8 import org.apache.log4j.Logger;
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9
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10 import digilib.image.ImageJobDescription;
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11 import digilib.io.DocuDirectory;
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12 import digilib.io.FileOpException;
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13 import digilib.io.FileOps.FileClass;
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14 import digilib.util.NumRange;
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15 import digilib.util.OptionsSet;
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16 import digilib.util.ParameterMap;
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17
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18
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19 /**
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20 * A container class for storing a set of instruction parameters
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21 * used for content generator classes like MakePDF.
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22 *
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23 *
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24 * @author cmielack, casties
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25 *
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26 */
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27 public class PDFRequest extends ParameterMap {
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28
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29 DigilibConfiguration dlConfig = null;
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30 NumRange pages = null;
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31 /** general logger for this class */
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32 protected static Logger logger = Logger.getLogger("digilib.servlet");
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33
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34
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35 /**
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36 * Initialize the PDFJobInformation
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37 *
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38 * @param dlcfg
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39 * The DigilibConfiguration.
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40 */
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41 public PDFRequest(DigilibConfiguration dlcfg) {
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42 super(30);
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43 dlConfig = dlcfg;
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44 }
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45
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46 /**
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47 * Initialize the PDFJobInformation with a request.
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48 *
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49 * @param dlcfg The DigilibConfiguration.
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50 * @param request
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51 * @throws FileOpException
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52 */
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53 public PDFRequest(HttpServletRequest request, DigilibConfiguration dlcfg) throws FileOpException {
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54 super(30);
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55 dlConfig = dlcfg;
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56 this.setWithRequest(request);
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57 }
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58
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59
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60 protected void initParams() {
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61 // page numbers
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62 newParameter("pgs", "", null, 's');
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63 // url of the page/document (second part)
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64 newParameter("fn", "", null, 's');
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65 // width of client in pixels
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66 newParameter("dw", new Integer(0), null, 's');
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67 // height of client in pixels
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68 newParameter("dh", new Integer(500), null, 's');
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69 }
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70
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71 /* (non-Javadoc)
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72 * @see digilib.servlet.ParameterMap#initOptions()
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73 */
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74 @Override
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75 protected void initOptions() {
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76 options = (OptionsSet) getValue("mo");
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77 }
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78
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79 /**
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80 * Read the request object.
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81 *
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82 * @param request
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83 * @throws FileOpException
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84 */
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85 public void setWithRequest(HttpServletRequest request) throws FileOpException {
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86 // read matching request parameters for the parameters in this map
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87 for (String k : params.keySet()) {
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88 if (request.getParameterMap().containsKey(k)) {
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89 setValueFromString(k, request.getParameter(k));
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90 }
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91 }
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92 // process parameters
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93 pages = new NumRange(getAsString("pgs"));
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94 ImageJobDescription ij = ImageJobDescription.getInstance(this, dlConfig);
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95 DocuDirectory dir = ij.getFileDirectory();
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96 int dirsize = dir.size(FileClass.IMAGE);
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97 pages.setMaxnum(dirsize);
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98 }
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99
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100
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101 /**
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102 * Generate a filename for the pdf to be created.
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103 *
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104 * @return
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105 */
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106 public String getDocumentId(){
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107 String fn = getAsString("fn");
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108 String dh = getAsString("dh");
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109 String dw = getAsString("dw");
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110 String pgs = getAsString("pgs");
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111
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112 String id = "fn=" + fn + "&dw=" + dw + "&dh=" + dh + "&pgs=" + pgs + ".pdf";
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113 // make safe to use as filename by urlencoding
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114 try {
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115 id = URLEncoder.encode(id, "UTF-8");
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116 } catch (UnsupportedEncodingException e) {
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117 // this shouldn't happen
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118 }
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119 return id;
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120 }
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121
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122
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123 public ImageJobDescription getImageJobInformation(){
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124 return ImageJobDescription.getInstance(this, dlConfig);
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125 }
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126
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127
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128 public NumRange getPages() {
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129 return pages;
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130 }
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131
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132
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133 /**
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134 * Check parameters for validity.
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135 * Returns true if no errors are found.
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136 *
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137 * @return
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138 */
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139 public boolean checkValidity(){
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140 if (pages != null) {
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141 return true;
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142 }
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143 return false;
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144 }
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145
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146 public DigilibConfiguration getDlConfig(){
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147 return dlConfig;
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148 }
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149
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150 } |
