org.argeo.cms/src/org/argeo/cms/acr/AbstractContentRepository.java

   1 package org.argeo.cms.acr;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.io.OutputStream;
   6 import java.nio.file.Files;
   7 import java.nio.file.Path;
   8 import java.util.Set;
   9
  10 import javax.xml.namespace.QName;
  11 import javax.xml.parsers.DocumentBuilder;
  12 import javax.xml.transform.OutputKeys;
  13 import javax.xml.transform.Transformer;
  14 import javax.xml.transform.TransformerException;
  15 import javax.xml.transform.TransformerFactory;
  16 import javax.xml.transform.dom.DOMSource;
  17 import javax.xml.transform.stream.StreamResult;
  18
  19 import org.argeo.api.acr.Content;
  20 import org.argeo.api.acr.CrName;
  21 import org.argeo.api.acr.spi.ContentProvider;
  22 import org.argeo.api.acr.spi.ProvidedContent;
  23 import org.argeo.api.acr.spi.ProvidedRepository;
  24 import org.argeo.api.cms.CmsLog;
  25 import org.argeo.api.uuid.UuidFactory;
  26 import org.argeo.cms.acr.xml.DomContentProvider;
  27 import org.argeo.cms.acr.xml.DomUtils;
  28 import org.w3c.dom.DOMException;
  29 import org.w3c.dom.Document;
  30 import org.w3c.dom.Element;
  31 import org.xml.sax.SAXException;
  32
  33 /**
  34  * Base implementation of a {@link ProvidedRepository}.
  35  */
  36 public abstract class AbstractContentRepository implements ProvidedRepository {
  37         private final static CmsLog log = CmsLog.getLog(AbstractContentRepository.class);
  38
  39         private UuidFactory uuidFactory;
  40
  41         private MountManager mountManager;
  42         private TypesManager typesManager;
  43
  44         private CmsContentSession systemSession;
  45
  46         // utilities
  47         /** Should be used only to copy source and results. */
  48         private TransformerFactory identityTransformerFactory = TransformerFactory.newInstance();
  49
  50         public final static String ACR_MOUNT_PATH_PROPERTY = "acr.mount.path";
  51
  52         public AbstractContentRepository() {
  53                 // types
  54                 typesManager = new TypesManager();
  55                 typesManager.init();
  56                 Set<QName> types = typesManager.listTypes();
  57                 if (log.isTraceEnabled())
  58                         for (QName type : types) {
  59                                 log.trace(type + " - " + typesManager.getAttributeTypes(type));
  60                         }
  61
  62         }
  63
  64         protected abstract CmsContentSession newSystemSession();
  65
  66         public void start() {
  67                 systemSession = newSystemSession();
  68                 // mounts
  69                 mountManager = new MountManager(systemSession);
  70         }
  71
  72         public void stop() {
  73                 systemSession.close();
  74                 systemSession = null;
  75         }
  76
  77         /*
  78          * REPOSITORY
  79          */
  80
  81         public void addProvider(ContentProvider provider) {
  82                 mountManager.addStructuralContentProvider(provider);
  83         }
  84
  85         public void registerTypes(String prefix, String namespaceURI, String schemaSystemId) {
  86                 typesManager.registerTypes(prefix, namespaceURI, schemaSystemId);
  87         }
  88
  89         /*
  90          * FACTORIES
  91          */
  92         public void initRootContentProvider(Path path) {
  93                 try {
  94 //                      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
  95 //                      factory.setNamespaceAware(true);
  96 //                      factory.setXIncludeAware(true);
  97 //                      factory.setSchema(contentTypesManager.getSchema());
  98 //
  99                         DocumentBuilder dBuilder = typesManager.newDocumentBuilder();
 100
 101                         Document document;
 102 //                      if (path != null && Files.exists(path)) {
 103 //                              InputSource inputSource = new InputSource(path.toAbsolutePath().toUri().toString());
 104 //                              inputSource.setEncoding(StandardCharsets.UTF_8.name());
 105 //                              // TODO public id as well?
 106 //                              document = dBuilder.parse(inputSource);
 107 //                      } else {
 108                         document = dBuilder.newDocument();
 109                         Element root = document.createElementNS(CrName.CR_NAMESPACE_URI, CrName.ROOT.get().toPrefixedString());
 110
 111                         for (String prefix : typesManager.getPrefixes().keySet()) {
 112 //                              root.setAttributeNS(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, XMLConstants.XMLNS_ATTRIBUTE + ":" + prefix,
 113 //                                              contentTypesManager.getPrefixes().get(prefix));
 114                                 DomUtils.addNamespace(root, prefix, typesManager.getPrefixes().get(prefix));
 115                         }
 116
 117                         document.appendChild(root);
 118
 119                         // write it
 120                         if (path != null) {
 121                                 try (OutputStream out = Files.newOutputStream(path)) {
 122                                         writeDom(document, out);
 123                                 }
 124                         }
 125 //                      }
 126
 127                         String mountPath = "/";
 128                         DomContentProvider contentProvider = new DomContentProvider(mountPath, document);
 129                         addProvider(contentProvider);
 130                 } catch (DOMException | IOException e) {
 131                         throw new IllegalStateException("Cannot init ACR root " + path, e);
 132                 }
 133
 134         }
 135
 136         public void writeDom(Document document, OutputStream out) throws IOException {
 137                 try {
 138                         Transformer transformer = identityTransformerFactory.newTransformer();
 139                         transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
 140                         transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 141
 142                         DOMSource source = new DOMSource(document);
 143                         typesManager.validate(source);
 144                         StreamResult result = new StreamResult(out);
 145                         transformer.transform(source, result);
 146                 } catch (TransformerException e) {
 147                         throw new IOException("Cannot write dom", e);
 148                 }
 149         }
 150
 151         /*
 152          * MOUNT MANAGEMENT
 153          */
 154
 155         @Override
 156         public ContentProvider getMountContentProvider(Content mountPoint, boolean initialize, QName... types) {
 157                 String mountPath = mountPoint.getPath();
 158                 // TODO check consistency with types
 159
 160                 return mountManager.getOrAddMountedProvider(mountPath, (path) -> {
 161                         DocumentBuilder dBuilder = typesManager.newDocumentBuilder();
 162                         Document document;
 163                         if (initialize) {
 164                                 QName firstType = types[0];
 165                                 document = dBuilder.newDocument();
 166                                 String prefix = ((ProvidedContent) mountPoint).getSession().getPrefix(firstType.getNamespaceURI());
 167                                 Element root = document.createElementNS(firstType.getNamespaceURI(),
 168                                                 prefix + ":" + firstType.getLocalPart());
 169                                 DomUtils.addNamespace(root, prefix, firstType.getNamespaceURI());
 170                                 document.appendChild(root);
 171                         } else {
 172                                 try (InputStream in = mountPoint.open(InputStream.class)) {
 173                                         document = dBuilder.parse(in);
 174                                         // TODO check consistency with types
 175                                 } catch (IOException | SAXException e) {
 176                                         throw new IllegalStateException("Cannot load mount from " + mountPoint, e);
 177                                 }
 178                         }
 179                         DomContentProvider contentProvider = new DomContentProvider(path, document);
 180                         return contentProvider;
 181                 });
 182         }
 183
 184         @Override
 185         public boolean shouldMount(QName... types) {
 186                 if (types.length == 0)
 187                         return false;
 188                 QName firstType = types[0];
 189                 Set<QName> registeredTypes = typesManager.listTypes();
 190                 if (registeredTypes.contains(firstType))
 191                         return true;
 192                 return false;
 193         }
 194
 195         MountManager getMountManager() {
 196                 return mountManager;
 197         }
 198
 199         TypesManager getTypesManager() {
 200                 return typesManager;
 201         }
 202
 203         public void setUuidFactory(UuidFactory uuidFactory) {
 204                 this.uuidFactory = uuidFactory;
 205         }
 206
 207 }