org.argeo.jcr/src/org/argeo/jcr/JcrxApi.java

   1 package org.argeo.jcr;
   2
   3 import java.util.ArrayList;
   4 import java.util.Arrays;
   5 import java.util.List;
   6
   7 import javax.jcr.Node;
   8 import javax.jcr.Property;
   9 import javax.jcr.RepositoryException;
  10 import javax.jcr.Value;
  11
  12 /** Uilities around the JCR extensions. */
  13 public class JcrxApi {
  14         public final static String MD5 = "MD5";
  15         public final static String SHA1 = "SHA1";
  16         public final static String SHA256 = "SHA-256";
  17         public final static String SHA512 = "SHA-512";
  18
  19         public final static String EMPTY_MD5 = "d41d8cd98f00b204e9800998ecf8427e";
  20         public final static String EMPTY_SHA1 = "da39a3ee5e6b4b0d3255bfef95601890afd80709";
  21         public final static String EMPTY_SHA256 = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
  22         public final static String EMPTY_SHA512 = "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e";
  23
  24         public final static int LENGTH_MD5 = EMPTY_MD5.length();
  25         public final static int LENGTH_SHA1 = EMPTY_SHA1.length();
  26         public final static int LENGTH_SHA256 = EMPTY_SHA256.length();
  27         public final static int LENGTH_SHA512 = EMPTY_SHA512.length();
  28
  29         /*
  30          * XML
  31          */
  32         /**
  33          * Set as a subnode which will be exported as an XML element.
  34          */
  35         public static String getXmlValue(Node node, String name) {
  36                 try {
  37                         if (!node.hasNode(name))
  38                                 return null;
  39                         Node child = node.getNode(name);
  40                         if (!child.hasNode(Jcr.JCR_XMLTEXT))
  41                                 return null;
  42                         Node xmlText = child.getNode(Jcr.JCR_XMLTEXT);
  43                         if (!xmlText.hasProperty(Jcr.JCR_XMLCHARACTERS))
  44                                 throw new IllegalArgumentException(
  45                                                 "Node " + xmlText + " has no " + Jcr.JCR_XMLCHARACTERS + " property");
  46                         return xmlText.getProperty(Jcr.JCR_XMLCHARACTERS).getString();
  47                 } catch (RepositoryException e) {
  48                         throw new IllegalStateException("Cannot get " + name + " as XML text", e);
  49                 }
  50         }
  51
  52         /**
  53          * Set as a subnode which will be exported as an XML element.
  54          */
  55         public static void setXmlValue(Node node, String name, String value) {
  56                 try {
  57                         if (node.hasNode(name))
  58                                 node.getNode(name).getNode(Jcr.JCR_XMLTEXT).setProperty(Jcr.JCR_XMLCHARACTERS, value);
  59                         else
  60                                 node.addNode(name, JcrxType.JCRX_XMLVALUE).addNode(Jcr.JCR_XMLTEXT, JcrxType.JCRX_XMLTEXT)
  61                                                 .setProperty(Jcr.JCR_XMLCHARACTERS, value);
  62                 } catch (RepositoryException e) {
  63                         throw new IllegalStateException("Cannot set " + name + " as XML text", e);
  64                 }
  65         }
  66
  67         /**
  68          * Add a checksum replacing the one which was previously set with the same
  69          * length.
  70          */
  71         public static void addChecksum(Node node, String checksum) {
  72                 try {
  73                         if (!node.hasProperty(JcrxName.JCRX_SUM)) {
  74                                 node.setProperty(JcrxName.JCRX_SUM, new String[] { checksum });
  75                                 return;
  76                         } else {
  77                                 int stringLength = checksum.length();
  78                                 Property property = node.getProperty(JcrxName.JCRX_SUM);
  79                                 List<Value> values = Arrays.asList(property.getValues());
  80                                 Integer indexToRemove = null;
  81                                 values: for (int i = 0; i < values.size(); i++) {
  82                                         Value value = values.get(i);
  83                                         if (value.getString().length() == stringLength) {
  84                                                 indexToRemove = i;
  85                                                 break values;
  86                                         }
  87                                 }
  88                                 if (indexToRemove != null)
  89                                         values.set(indexToRemove, node.getSession().getValueFactory().createValue(checksum));
  90                                 else
  91                                         values.add(0, node.getSession().getValueFactory().createValue(checksum));
  92                                 property.setValue(values.toArray(new Value[values.size()]));
  93                         }
  94                 } catch (RepositoryException e) {
  95                         throw new JcrException("Cannot set checksum on " + node, e);
  96                 }
  97         }
  98
  99         /** Replace all checksums. */
 100         public static void setChecksums(Node node, List<String> checksums) {
 101                 try {
 102                         node.setProperty(JcrxName.JCRX_SUM, checksums.toArray(new String[checksums.size()]));
 103                 } catch (RepositoryException e) {
 104                         throw new JcrException("Cannot set checksums on " + node, e);
 105                 }
 106         }
 107
 108         /** Replace all checksums. */
 109         public static List<String> getChecksums(Node node) {
 110                 try {
 111                         List<String> res = new ArrayList<>();
 112                         if (!node.hasProperty(JcrxName.JCRX_SUM))
 113                                 return res;
 114                         Property property = node.getProperty(JcrxName.JCRX_SUM);
 115                         for (Value value : property.getValues()) {
 116                                 res.add(value.getString());
 117                         }
 118                         return res;
 119                 } catch (RepositoryException e) {
 120                         throw new JcrException("Cannot get checksums from " + node, e);
 121                 }
 122         }
 123
 124 //      /** Replace all checksums with this single one. */
 125 //      public static void setChecksum(Node node, String checksum) {
 126 //              setChecksums(node, Collections.singletonList(checksum));
 127 //      }
 128
 129         /** Retrieves the checksum with this algorithm, or null if not found. */
 130         public static String getChecksum(Node node, String algorithm) {
 131                 int stringLength;
 132                 switch (algorithm) {
 133                 case MD5:
 134                         stringLength = LENGTH_MD5;
 135                         break;
 136                 case SHA1:
 137                         stringLength = LENGTH_SHA1;
 138                         break;
 139                 case SHA256:
 140                         stringLength = LENGTH_SHA256;
 141                         break;
 142                 case SHA512:
 143                         stringLength = LENGTH_SHA512;
 144                         break;
 145                 default:
 146                         throw new IllegalArgumentException("Unkown algorithm " + algorithm);
 147                 }
 148                 return getChecksum(node, stringLength);
 149         }
 150
 151         /** Retrieves the checksum with this string length, or null if not found. */
 152         public static String getChecksum(Node node, int stringLength) {
 153                 try {
 154                         if (!node.hasProperty(JcrxName.JCRX_SUM))
 155                                 return null;
 156                         Property property = node.getProperty(JcrxName.JCRX_SUM);
 157                         for (Value value : property.getValues()) {
 158                                 String str = value.getString();
 159                                 if (str.length() == stringLength)
 160                                         return str;
 161                         }
 162                         return null;
 163                 } catch (RepositoryException e) {
 164                         throw new IllegalStateException("Cannot get checksum for " + node, e);
 165                 }
 166         }
 167
 168 }