Introduce namespace support

[lgpl/argeo-commons.git] / org.argeo.api / src / org / argeo / api / gcr / ContentNamespace.java

diff --git a/org.argeo.api/src/org/argeo/api/gcr/ContentNamespace.java b/org.argeo.api/src/org/argeo/api/gcr/ContentNamespace.java
deleted file mode 100644 (file)
index a595571..0000000
--- a/org.argeo.api/src/org/argeo/api/gcr/ContentNamespace.java
+++ /dev/null
@@ -1,106 +0,0 @@
-package org.argeo.api.gcr;
-
-import java.net.URI;
-import java.net.URISyntaxException;
-import java.nio.charset.StandardCharsets;
-import java.util.Objects;
-import java.util.UUID;
-
-/**
- * An XML-style namespace with a related UUID v3.
- * 
- * @see https://www.w3.org/TR/xml-names/
- */
-public class ContentNamespace {
-       private final UUID uuid;
-       private final URI uri;
-
-       public ContentNamespace(String uri) {
-               try {
-                       this.uri = new URI(uri);
-               } catch (URISyntaxException e) {
-                       throw new IllegalArgumentException("Cannot interpret " + uri + " as URI", e);
-               }
-               this.uuid = namespaceUuid(this.uri);
-       }
-
-       public ContentNamespace(URI uri) {
-               this.uri = uri;
-               this.uuid = namespaceUuid(uri);
-       }
-
-       ContentNamespace(URI uri, UUID uuid) {
-               this.uri = uri;
-               assert uuid.equals(namespaceUuid(uri));
-               this.uuid = uuid;
-       }
-
-       /** Empty namespace */
-       private ContentNamespace() {
-               try {
-                       this.uri = new URI("");
-               } catch (URISyntaxException e) {
-                       throw new IllegalStateException("Cannot create empty URI");
-               }
-               this.uuid = NIL_UUID;
-       }
-
-       public UUID getUuid() {
-               return uuid;
-       }
-
-       public URI getUri() {
-               return uri;
-       }
-
-       public UUID nameUuid(String name) {
-               return nameUuid(getUuid(), name);
-       }
-
-
-       public final static UUID NIL_UUID = UUID.fromString("00000000-0000-0000-0000-000000000000");
-       public final static ContentNamespace EMPTY_NS = new ContentNamespace();
-
-       /**
-        * The UUID v3 of http://www.w3.org/2000/xmlns/ within the standard DNS
-        * namespace, to be used as a base for the namespaces.
-        * 
-        * @see https://www.w3.org/TR/xml-names/#ns-decl
-        */
-       // uuidgen --md5 --namespace @dns --name http://www.w3.org/2000/xmlns/
-       // NOTE : must be declared before default namespaces
-       public final static UUID XMLNS_UUID = UUID.fromString("4b352aad-ba1c-3139-b9d3-41e5816f6088");
-       public final static ContentNamespace CR_NS = new ContentNamespace("http://argeo.org/ns/cr");
-
-
-       public static UUID namespaceUuid(URI namespaceUri) {
-               Objects.requireNonNull(namespaceUri, "Namespace URI cannot be null");
-               return nameUUIDv3(XMLNS_UUID, namespaceUri.toString().getBytes(StandardCharsets.UTF_8));
-       }
-
-       public static UUID nameUuid(UUID namespace, String name) {
-               Objects.requireNonNull(namespace, "Namespace cannot be null");
-               Objects.requireNonNull(namespace, "Name cannot be null");
-               return nameUUIDv3(namespace, name.getBytes(StandardCharsets.UTF_8));
-       }
-
-       /*
-        * CANONICAL IMPLEMENTATION based on java.util.UUID.nameUUIDFromBytes(byte[])
-        */
-       private static UUID nameUUIDv3(UUID namespace, byte[] name) {
-               byte[] arr = new byte[name.length + 16];
-               copyUuidBytes(namespace, arr, 0);
-               System.arraycopy(name, 0, arr, 16, name.length);
-               return UUID.nameUUIDFromBytes(arr);
-       }
-
-       private static void copyUuidBytes(UUID uuid, byte[] arr, int offset) {
-               long msb = uuid.getMostSignificantBits();
-               long lsb = uuid.getLeastSignificantBits();
-               assert arr.length >= 16 + offset;
-               for (int i = offset; i < 8 + offset; i++)
-                       arr[i] = (byte) ((msb >> ((7 - i) * 8)) & 0xff);
-               for (int i = 8 + offset; i < 16 + offset; i++)
-                       arr[i] = (byte) ((lsb >> ((15 - i) * 8)) & 0xff);
-       }
-}