X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.cms%2Fsrc%2Forg%2Fargeo%2Fcms%2Facr%2Ffs%2FFsContentProvider.java;h=9b1b9668303f066e2106de3aa4a296edcabbf55d;hb=54df376a9c2dd458a82eaa09bfbb718fe699dd0d;hp=99ed3a8ca61689c11d89f139aad9f2ad8984e5ff;hpb=7d2a002f5dcfe8a8c7b29803b70d4b1aff265ed1;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.cms/src/org/argeo/cms/acr/fs/FsContentProvider.java b/org.argeo.cms/src/org/argeo/cms/acr/fs/FsContentProvider.java
index 99ed3a8ca..9b1b96683 100644
--- a/org.argeo.cms/src/org/argeo/cms/acr/fs/FsContentProvider.java
+++ b/org.argeo.cms/src/org/argeo/cms/acr/fs/FsContentProvider.java
@@ -1,23 +1,105 @@
 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.Objects;
+import java.util.TreeMap;
+import java.util.stream.Collectors;
 
-import org.argeo.api.acr.Content;
+import org.argeo.api.acr.ArgeoNamespace;
 import org.argeo.api.acr.ContentResourceException;
+import org.argeo.api.acr.NamespaceUtils;
+import org.argeo.api.acr.RuntimeNamespaceContext;
 import org.argeo.api.acr.spi.ContentProvider;
+import org.argeo.api.acr.spi.ProvidedContent;
 import org.argeo.api.acr.spi.ProvidedSession;
 
+/** Access a file system as a {@link ContentProvider}. */
 public class FsContentProvider implements ContentProvider {
-	private final Path rootPath;
+	final static String XMLNS_ = "xmlns:";
 
-	public FsContentProvider(Path rootPath) {
-		super();
+	protected String mountPath;
+	protected Path rootPath;
+
+	private NavigableMap<String, String> prefixes = new TreeMap<>();
+
+	public FsContentProvider(String mountPath, Path rootPath) {
+		Objects.requireNonNull(mountPath);
+		Objects.requireNonNull(rootPath);
+
+		this.mountPath = mountPath;
 		this.rootPath = rootPath;
+		// FIXME make it more robust
+		initNamespaces();
+	}
+
+	protected FsContentProvider() {
+
 	}
 
-	boolean isRoot(Path path) {
+	protected void initNamespaces() {
+		try {
+			UserDefinedFileAttributeView udfav = Files.getFileAttributeView(rootPath,
+					UserDefinedFileAttributeView.class);
+			if (udfav == null)
+				return;
+			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, ArgeoNamespace.CR_DEFAULT_PREFIX, ArgeoNamespace.CR_NAMESPACE_URI);
+			addDefaultNamespace(udfav, "basic", ArgeoNamespace.CR_NAMESPACE_URI);
+			addDefaultNamespace(udfav, "owner", ArgeoNamespace.CR_NAMESPACE_URI);
+			addDefaultNamespace(udfav, "posix", ArgeoNamespace.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));
+			udfav.write(XMLNS_ + prefix, bb);
+			prefixes.put(prefix, namespace);
+		}
+	}
+
+	public void registerPrefix(String prefix, String namespace) {
+		if (prefixes.containsKey(prefix))
+			prefixes.remove(prefix);
+		try {
+			UserDefinedFileAttributeView udfav = Files.getFileAttributeView(rootPath,
+					UserDefinedFileAttributeView.class);
+			addDefaultNamespace(udfav, prefix, namespace);
+		} catch (IOException e) {
+			throw new RuntimeException("Cannot register namespace " + prefix + " " + namespace + " on " + rootPath, e);
+		}
+
+	}
+
+	@Override
+	public String getMountPath() {
+		return mountPath;
+	}
+
+	boolean isMountBase(Path path) {
 		try {
 			return Files.isSameFile(rootPath, path);
 		} catch (IOException e) {
@@ -26,7 +108,39 @@ public class FsContentProvider implements ContentProvider {
 	}
 
 	@Override
-	public Content get(ProvidedSession session, String mountPath, String relativePath) {
+	public ProvidedContent get(ProvidedSession session, String relativePath) {
 		return new FsContent(session, this, rootPath.resolve(relativePath));
 	}
+
+	@Override
+	public boolean exists(ProvidedSession session, String relativePath) {
+		return Files.exists(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) {
+		Iterator<String> res = NamespaceUtils.getPrefixes((ns) -> prefixes.entrySet().stream()
+				.filter(e -> e.getValue().equals(ns)).map(Map.Entry::getKey).collect(Collectors.toUnmodifiableSet()),
+				namespaceURI);
+		if (!res.hasNext()) {
+			String prefix = RuntimeNamespaceContext.getNamespaceContext().getPrefix(namespaceURI);
+			if (prefix != null) {
+				registerPrefix(prefix, namespaceURI);
+				return getPrefixes(namespaceURI);
+			} else {
+				throw new IllegalArgumentException("Unknown namespace " + namespaceURI);
+			}
+		}
+		return res;
+	}
+
 }