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.HashSet;
   9 import java.util.Set;
  10
  11 import javax.xml.namespace.QName;
  12 import javax.xml.parsers.DocumentBuilder;
  13 import javax.xml.transform.OutputKeys;
  14 import javax.xml.transform.Transformer;
  15 import javax.xml.transform.TransformerException;
  16 import javax.xml.transform.TransformerFactory;
  17 import javax.xml.transform.dom.DOMSource;
  18 import javax.xml.transform.stream.StreamResult;
  19
  20 import org.argeo.api.acr.Content;
  21 import org.argeo.api.acr.CrName;
  22 import org.argeo.api.acr.NamespaceUtils;
  23 import org.argeo.api.acr.RuntimeNamespaceContext;
  24 import org.argeo.api.acr.spi.ContentProvider;
  25 import org.argeo.api.acr.spi.ProvidedContent;
  26 import org.argeo.api.acr.spi.ProvidedRepository;
  27 import org.argeo.api.cms.CmsLog;
  28 import org.argeo.cms.acr.xml.DomContentProvider;
  29 import org.argeo.cms.acr.xml.DomUtils;
  30 import org.w3c.dom.DOMException;
  31 import org.w3c.dom.Document;
  32 import org.w3c.dom.Element;
  33 import org.xml.sax.SAXException;
  34
  35 /**
  36  * Base implementation of a {@link ProvidedRepository}.
  37  */
  38 public abstract class AbstractContentRepository implements ProvidedRepository {
  39         private final static CmsLog log = CmsLog.getLog(AbstractContentRepository.class);
  40
  41         private MountManager mountManager;
  42         private TypesManager typesManager;
  43
  44         private CmsContentSession systemSession;
  45
  46         private Set<ContentProvider> providersToAdd = new HashSet<>();
  47
  48         // utilities
  49         /** Should be used only to copy source and results. */
  50         private TransformerFactory identityTransformerFactory = TransformerFactory.newInstance();
  51
  52 //      public final static String ACR_MOUNT_PATH_PROPERTY = "acr.mount.path";
  53
  54         public AbstractContentRepository() {
  55                 long begin = System.currentTimeMillis();
  56                 // types
  57                 typesManager = new TypesManager();
  58                 typesManager.init();
  59                 Set<QName> types = typesManager.listTypes();
  60                 if (log.isTraceEnabled())
  61                         for (QName type : types) {
  62                                 log.trace(type + " - " + typesManager.getAttributeTypes(type));
  63                         }
  64                 long duration = System.currentTimeMillis() - begin;
  65                 log.debug(() -> "CMS content types available (initialisation took " + duration + " ms)");
  66         }
  67
  68         protected abstract CmsContentSession newSystemSession();
  69
  70         public void start() {
  71                 systemSession = newSystemSession();
  72                 // mounts
  73                 mountManager = new MountManager(systemSession);
  74         }
  75
  76         public void stop() {
  77                 systemSession.close();
  78                 systemSession = null;
  79         }
  80
  81         /*
  82          * REPOSITORY
  83          */
  84         @Override
  85         public void addProvider(ContentProvider provider) {
  86                 if (mountManager == null) {
  87                         providersToAdd.add(provider);
  88                         log.debug(
  89                                         () -> "Will add provider " + provider.getMountPath() + " (" + provider.getClass().getName() + ")");
  90                 } else {
  91                         mountManager.addStructuralContentProvider(provider);
  92                         log.debug(() -> "Added provider " + provider.getMountPath() + " (" + provider.getClass().getName() + ")");
  93                 }
  94         }
  95
  96         public void registerTypes(String prefix, String namespaceURI, String schemaSystemId) {
  97                 typesManager.registerTypes(prefix, namespaceURI, schemaSystemId);
  98         }
  99
 100         /*
 101          * FACTORIES
 102          */
 103         public void initRootContentProvider(Path path) {
 104                 try {
 105 //                      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 106 //                      factory.setNamespaceAware(true);
 107 //                      factory.setXIncludeAware(true);
 108 //                      factory.setSchema(contentTypesManager.getSchema());
 109 //
 110                         DocumentBuilder dBuilder = typesManager.newDocumentBuilder();
 111
 112                         Document document;
 113 //                      if (path != null && Files.exists(path)) {
 114 //                              InputSource inputSource = new InputSource(path.toAbsolutePath().toUri().toString());
 115 //                              inputSource.setEncoding(StandardCharsets.UTF_8.name());
 116 //                              // TODO public id as well?
 117 //                              document = dBuilder.parse(inputSource);
 118 //                      } else {
 119                         document = dBuilder.newDocument();
 120                         Element root = document.createElementNS(CrName.CR_NAMESPACE_URI,
 121                                         NamespaceUtils.toPrefixedName(CrName.root.qName()));
 122
 123                         for (String prefix : RuntimeNamespaceContext.getPrefixes().keySet()) {
 124 //                              root.setAttributeNS(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, XMLConstants.XMLNS_ATTRIBUTE + ":" + prefix,
 125 //                                              contentTypesManager.getPrefixes().get(prefix));
 126                                 DomUtils.addNamespace(root, prefix,
 127                                                 RuntimeNamespaceContext.getNamespaceContext().getNamespaceURI(prefix));
 128                         }
 129
 130                         document.appendChild(root);
 131
 132                         // write it
 133                         if (path != null) {
 134                                 try (OutputStream out = Files.newOutputStream(path)) {
 135                                         writeDom(document, out);
 136                                 }
 137                         }
 138 //                      }
 139
 140                         String mountPath = "/";
 141                         DomContentProvider contentProvider = new DomContentProvider(mountPath, document);
 142                         addProvider(contentProvider);
 143                 } catch (DOMException | IOException e) {
 144                         throw new IllegalStateException("Cannot init ACR root " + path, e);
 145                 }
 146
 147                 // add content providers already notified
 148                 for (ContentProvider contentProvider : providersToAdd)
 149                         addProvider(contentProvider);
 150                 providersToAdd.clear();
 151         }
 152
 153         public void writeDom(Document document, OutputStream out) throws IOException {
 154                 try {
 155                         Transformer transformer = identityTransformerFactory.newTransformer();
 156                         transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
 157                         transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 158
 159                         DOMSource source = new DOMSource(document);
 160                         typesManager.validate(source);
 161                         StreamResult result = new StreamResult(out);
 162                         transformer.transform(source, result);
 163                 } catch (TransformerException e) {
 164                         throw new IOException("Cannot write dom", e);
 165                 }
 166         }
 167
 168         /*
 169          * MOUNT MANAGEMENT
 170          */
 171
 172         @Override
 173         public ContentProvider getMountContentProvider(Content mountPoint, boolean initialize, QName... types) {
 174                 String mountPath = mountPoint.getPath();
 175                 // TODO check consistency with types
 176
 177                 return mountManager.getOrAddMountedProvider(mountPath, (path) -> {
 178                         DocumentBuilder dBuilder = typesManager.newDocumentBuilder();
 179                         Document document;
 180                         if (initialize) {
 181                                 QName firstType = types[0];
 182                                 document = dBuilder.newDocument();
 183                                 String prefix = ((ProvidedContent) mountPoint).getSession().getPrefix(firstType.getNamespaceURI());
 184                                 Element root = document.createElementNS(firstType.getNamespaceURI(),
 185                                                 prefix + ":" + firstType.getLocalPart());
 186                                 DomUtils.addNamespace(root, prefix, firstType.getNamespaceURI());
 187                                 document.appendChild(root);
 188                         } else {
 189                                 try (InputStream in = mountPoint.open(InputStream.class)) {
 190                                         document = dBuilder.parse(in);
 191                                         // TODO check consistency with types
 192                                 } catch (IOException | SAXException e) {
 193                                         throw new IllegalStateException("Cannot load mount from " + mountPoint, e);
 194                                 }
 195                         }
 196                         DomContentProvider contentProvider = new DomContentProvider(path, document);
 197                         return contentProvider;
 198                 });
 199         }
 200
 201         @Override
 202         public boolean shouldMount(QName... types) {
 203                 if (types.length == 0)
 204                         return false;
 205                 QName firstType = types[0];
 206                 Set<QName> registeredTypes = typesManager.listTypes();
 207                 if (registeredTypes.contains(firstType))
 208                         return true;
 209                 return false;
 210         }
 211
 212         MountManager getMountManager() {
 213                 return mountManager;
 214         }
 215
 216         TypesManager getTypesManager() {
 217                 return typesManager;
 218         }
 219
 220         CmsContentSession getSystemSession() {
 221                 return systemSession;
 222         }
 223
 224
 225 }