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.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.ArgeoNamespace;
  21 import org.argeo.api.acr.Content;
  22 import org.argeo.api.acr.CrName;
  23 import org.argeo.api.acr.NamespaceUtils;
  24 import org.argeo.api.acr.RuntimeNamespaceContext;
  25 import org.argeo.api.acr.spi.ContentProvider;
  26 import org.argeo.api.acr.spi.ProvidedContent;
  27 import org.argeo.api.acr.spi.ProvidedRepository;
  28 import org.argeo.api.cms.CmsLog;
  29 import org.argeo.cms.acr.xml.DomContentProvider;
  30 import org.argeo.cms.acr.xml.DomUtils;
  31 import org.w3c.dom.DOMException;
  32 import org.w3c.dom.Document;
  33 import org.w3c.dom.Element;
  34 import org.xml.sax.SAXException;
  35
  36 /**
  37  * Base implementation of a {@link ProvidedRepository}.
  38  */
  39 public abstract class AbstractContentRepository implements ProvidedRepository {
  40         private final static CmsLog log = CmsLog.getLog(AbstractContentRepository.class);
  41
  42         private MountManager mountManager;
  43         private TypesManager typesManager;
  44
  45         private CmsContentSession systemSession;
  46
  47         private Set<ContentProvider> providersToAdd = new HashSet<>();
  48
  49         // utilities
  50         /** Should be used only to copy source and results. */
  51         private TransformerFactory identityTransformerFactory = TransformerFactory.newInstance();
  52
  53 //      public final static String ACR_MOUNT_PATH_PROPERTY = "acr.mount.path";
  54
  55         public AbstractContentRepository() {
  56                 long begin = System.currentTimeMillis();
  57                 // types
  58                 typesManager = new TypesManager();
  59                 typesManager.init();
  60                 Set<QName> types = typesManager.listTypes();
  61                 if (log.isTraceEnabled())
  62                         for (QName type : types) {
  63                                 log.trace(type + " - " + typesManager.getAttributeTypes(type));
  64                         }
  65                 long duration = System.currentTimeMillis() - begin;
  66                 log.debug(() -> "CMS content types available (initialisation took " + duration + " ms)");
  67         }
  68
  69         protected abstract CmsContentSession newSystemSession();
  70
  71         public void start() {
  72                 systemSession = newSystemSession();
  73                 // mounts
  74                 mountManager = new MountManager(systemSession);
  75         }
  76
  77         public void stop() {
  78                 systemSession.close();
  79                 systemSession = null;
  80         }
  81
  82         /*
  83          * REPOSITORY
  84          */
  85         @Override
  86         public void addProvider(ContentProvider provider) {
  87                 if (mountManager == null) {
  88                         providersToAdd.add(provider);
  89                         log.debug(
  90                                         () -> "Will add provider " + provider.getMountPath() + " (" + provider.getClass().getName() + ")");
  91                 } else {
  92                         mountManager.addStructuralContentProvider(provider);
  93                         log.debug(() -> "Added provider " + provider.getMountPath() + " (" + provider.getClass().getName() + ")");
  94                 }
  95         }
  96
  97         public void registerTypes(String prefix, String namespaceURI, String schemaSystemId) {
  98                 typesManager.registerTypes(prefix, namespaceURI, schemaSystemId);
  99         }
 100
 101         /*
 102          * FACTORIES
 103          */
 104         public void initRootContentProvider(Path path) {
 105                 try {
 106 //                      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 107 //                      factory.setNamespaceAware(true);
 108 //                      factory.setXIncludeAware(true);
 109 //                      factory.setSchema(contentTypesManager.getSchema());
 110 //
 111                         DocumentBuilder dBuilder = typesManager.newDocumentBuilder();
 112
 113                         Document document;
 114 //                      if (path != null && Files.exists(path)) {
 115 //                              InputSource inputSource = new InputSource(path.toAbsolutePath().toUri().toString());
 116 //                              inputSource.setEncoding(StandardCharsets.UTF_8.name());
 117 //                              // TODO public id as well?
 118 //                              document = dBuilder.parse(inputSource);
 119 //                      } else {
 120                         document = dBuilder.newDocument();
 121                         Element root = document.createElementNS(ArgeoNamespace.CR_NAMESPACE_URI,
 122                                         NamespaceUtils.toPrefixedName(CrName.root.qName()));
 123
 124                         for (String prefix : RuntimeNamespaceContext.getPrefixes().keySet()) {
 125 //                              root.setAttributeNS(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, XMLConstants.XMLNS_ATTRIBUTE + ":" + prefix,
 126 //                                              contentTypesManager.getPrefixes().get(prefix));
 127                                 DomUtils.addNamespace(root, prefix,
 128                                                 RuntimeNamespaceContext.getNamespaceContext().getNamespaceURI(prefix));
 129                         }
 130
 131                         document.appendChild(root);
 132
 133                         // write it
 134                         if (path != null) {
 135                                 try (OutputStream out = Files.newOutputStream(path)) {
 136                                         writeDom(document, out);
 137                                 }
 138                         }
 139 //                      }
 140
 141                         String mountPath = "/";
 142                         DomContentProvider contentProvider = new DomContentProvider(mountPath, document);
 143                         addProvider(contentProvider);
 144                 } catch (DOMException | IOException e) {
 145                         throw new IllegalStateException("Cannot init ACR root " + path, e);
 146                 }
 147
 148                 // add content providers already notified
 149                 for (ContentProvider contentProvider : providersToAdd)
 150                         addProvider(contentProvider);
 151                 providersToAdd.clear();
 152         }
 153
 154         public void writeDom(Document document, OutputStream out) throws IOException {
 155                 try {
 156                         Transformer transformer = identityTransformerFactory.newTransformer();
 157                         transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
 158                         transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 159
 160                         DOMSource source = new DOMSource(document);
 161                         typesManager.validate(source);
 162                         StreamResult result = new StreamResult(out);
 163                         transformer.transform(source, result);
 164                 } catch (TransformerException e) {
 165                         throw new IOException("Cannot write dom", e);
 166                 }
 167         }
 168
 169         /*
 170          * MOUNT MANAGEMENT
 171          */
 172
 173         @Override
 174         public ContentProvider getMountContentProvider(Content mountPoint, boolean initialize, QName... types) {
 175                 String mountPath = mountPoint.getPath();
 176                 // TODO check consistency with types
 177
 178                 return mountManager.getOrAddMountedProvider(mountPath, (path) -> {
 179                         DocumentBuilder dBuilder = typesManager.newDocumentBuilder();
 180                         Document document;
 181                         if (initialize) {
 182                                 QName firstType = types[0];
 183                                 document = dBuilder.newDocument();
 184                                 String prefix = ((ProvidedContent) mountPoint).getSession().getPrefix(firstType.getNamespaceURI());
 185                                 Element root = document.createElementNS(firstType.getNamespaceURI(),
 186                                                 prefix + ":" + firstType.getLocalPart());
 187                                 DomUtils.addNamespace(root, prefix, firstType.getNamespaceURI());
 188                                 document.appendChild(root);
 189                         } else {
 190                                 try (InputStream in = mountPoint.open(InputStream.class)) {
 191                                         document = dBuilder.parse(in);
 192                                         // TODO check consistency with types
 193                                 } catch (IOException | SAXException e) {
 194                                         throw new IllegalStateException("Cannot load mount from " + mountPoint, e);
 195                                 }
 196                         }
 197                         DomContentProvider contentProvider = new DomContentProvider(path, document);
 198                         return contentProvider;
 199                 });
 200         }
 201
 202         @Override
 203         public boolean shouldMount(QName... types) {
 204                 if (types.length == 0)
 205                         return false;
 206                 QName firstType = types[0];
 207                 Set<QName> registeredTypes = typesManager.listTypes();
 208                 if (registeredTypes.contains(firstType))
 209                         return true;
 210                 return false;
 211         }
 212
 213         MountManager getMountManager() {
 214                 return mountManager;
 215         }
 216
 217         TypesManager getTypesManager() {
 218                 return typesManager;
 219         }
 220
 221         CmsContentSession getSystemSession() {
 222                 return systemSession;
 223         }
 224
 225
 226 }