Clean up and refactor ACR and component register.

[lgpl/argeo-commons.git] / org.argeo.api.acr / src / org / argeo / api / acr / CrAttributeType.java

diff --git a/org.argeo.api.acr/src/org/argeo/api/acr/CrAttributeType.java b/org.argeo.api.acr/src/org/argeo/api/acr/CrAttributeType.java
index ffa28af0aca580a6d358030d9f1e4c038f1aa179..446449ec0b42e63b676726770c18de46632324d9 100644 (file)
--- a/org.argeo.api.acr/src/org/argeo/api/acr/CrAttributeType.java
+++ b/org.argeo.api.acr/src/org/argeo/api/acr/CrAttributeType.java
@@ -4,6 +4,9 @@ import java.net.URI;
 import java.net.URISyntaxException;
 import java.time.Instant;
 import java.time.format.DateTimeParseException;
+import java.util.Arrays;
+import java.util.Base64;
+import java.util.List;
 import java.util.UUID;
 
 import javax.xml.XMLConstants;
@@ -58,6 +61,7 @@ public enum CrAttributeType implements ContentNameSupplier {
                        return XMLConstants.W3C_XML_SCHEMA_NS_URI;
        }
 
+       /** Default parsing procedure from a String to an object. */
        public static Object parse(String str) {
                if (str == null)
                        throw new IllegalArgumentException("String cannot be null");
@@ -113,6 +117,34 @@ public enum CrAttributeType implements ContentNameSupplier {
                return STRING.getFormatter().parse(str);
        }
 
+       /** Utility to convert a data: URI to bytes. */
+       public static byte[] bytesFromDataURI(URI uri) {
+               if (!"data".equals(uri.getScheme()))
+                       throw new IllegalArgumentException("URI must have 'data' as a scheme");
+               String schemeSpecificPart = uri.getSchemeSpecificPart();
+               int commaIndex = schemeSpecificPart.indexOf(',');
+               String prefix = schemeSpecificPart.substring(0, commaIndex);
+               List<String> info = Arrays.asList(prefix.split(";"));
+               if (!info.contains("base64"))
+                       throw new IllegalArgumentException("URI must specify base64");
+
+               String base64Str = schemeSpecificPart.substring(commaIndex + 1);
+               return Base64.getDecoder().decode(base64Str);
+
+       }
+
+       /** Utility to convert bytes to a data: URI. */
+       public static URI bytesToDataURI(byte[] arr) {
+               String base64Str = Base64.getEncoder().encodeToString(arr);
+               try {
+                       final String PREFIX = "data:application/octet-stream;base64,";
+                       return new URI(PREFIX + base64Str);
+               } catch (URISyntaxException e) {
+                       throw new IllegalStateException("Cannot serialize bytes a Base64 data URI", e);
+               }
+
+       }
+
        static class BooleanFormatter implements AttributeFormatter<Boolean> {
 
                /**