package org.argeo.cms.acr.fs;
import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
+import java.nio.file.attribute.UserDefinedFileAttributeView;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.NavigableMap;
+import java.util.TreeMap;
+import java.util.stream.Collectors;
import org.argeo.api.acr.Content;
import org.argeo.api.acr.ContentResourceException;
+import org.argeo.api.acr.CrName;
+import org.argeo.api.acr.NamespaceUtils;
import org.argeo.api.acr.spi.ContentProvider;
import org.argeo.api.acr.spi.ProvidedSession;
+/** Access a file system as a {@link ContentProvider}. */
public class FsContentProvider implements ContentProvider {
+ final static String XMLNS_ = "xmlns:";
+
private final Path rootPath;
+ private final boolean isRoot;
+
+ private NavigableMap<String, String> prefixes = new TreeMap<>();
- public FsContentProvider(Path rootPath) {
- super();
+ public FsContentProvider(Path rootPath, boolean isRoot) {
this.rootPath = rootPath;
+ this.isRoot = isRoot;
+ initNamespaces();
+ }
+
+ protected void initNamespaces() {
+ try {
+ UserDefinedFileAttributeView udfav = Files.getFileAttributeView(rootPath,
+ UserDefinedFileAttributeView.class);
+ for (String name : udfav.list()) {
+ if (name.startsWith(XMLNS_)) {
+ ByteBuffer buf = ByteBuffer.allocate(udfav.size(name));
+ udfav.read(name, buf);
+ buf.flip();
+ String namespace = StandardCharsets.UTF_8.decode(buf).toString();
+ String prefix = name.substring(XMLNS_.length());
+ prefixes.put(prefix, namespace);
+ }
+ }
+
+ // defaults
+ addDefaultNamespace(udfav, CrName.CR_DEFAULT_PREFIX, CrName.CR_NAMESPACE_URI);
+ addDefaultNamespace(udfav, "basic", CrName.CR_NAMESPACE_URI);
+ addDefaultNamespace(udfav, "owner", CrName.CR_NAMESPACE_URI);
+ addDefaultNamespace(udfav, "posix", CrName.CR_NAMESPACE_URI);
+ } catch (IOException e) {
+ throw new RuntimeException("Cannot read namespaces from " + rootPath, e);
+ }
+
+ }
+
+ protected void addDefaultNamespace(UserDefinedFileAttributeView udfav, String prefix, String namespace)
+ throws IOException {
+ if (!prefixes.containsKey(prefix)) {
+ ByteBuffer bb = ByteBuffer.wrap(namespace.getBytes(StandardCharsets.UTF_8));
+ int size = udfav.write(XMLNS_ + prefix, bb);
+ prefixes.put(prefix, namespace);
+ }
}
boolean isRoot(Path path) {
try {
- return Files.isSameFile(rootPath, path);
+ return isRoot && Files.isSameFile(rootPath, path);
} catch (IOException e) {
throw new ContentResourceException(e);
}
public Content get(ProvidedSession session, String mountPath, String relativePath) {
return new FsContent(session, this, rootPath.resolve(relativePath));
}
+
+ /*
+ * NAMESPACE CONTEXT
+ */
+
+ @Override
+ public String getNamespaceURI(String prefix) {
+ return NamespaceUtils.getNamespaceURI((p) -> prefixes.get(p), prefix);
+ }
+
+ @Override
+ public Iterator<String> getPrefixes(String namespaceURI) {
+ return NamespaceUtils.getPrefixes((ns) -> prefixes.entrySet().stream().filter(e -> e.getValue().equals(ns))
+ .map(Map.Entry::getKey).collect(Collectors.toUnmodifiableSet()), namespaceURI);
+ }
+
}