package be.nikiroo.utils.serial;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
public abstract class CustomSerializer {
- protected abstract String toString(Object value);
+ protected abstract void toStream(OutputStream out, Object value)
+ throws IOException;
- protected abstract Object fromString(String content);
+ protected abstract Object fromStream(InputStream in) throws IOException;
protected abstract String getType();
/**
- * Encode the object into the given builder if possible (if supported).
+ * Encode the object into the given {@link OutputStream} if supported.
*
- * @param builder
+ * @param out
* the builder to append to
* @param value
* the object to encode
- * @return TRUE if success, FALSE if not (the content of the builder won't
- * be changed in case of failure)
+ *
+ * @return FALSE if the value is not supported, TRUE if the operation was
+ * successful (if the value is supported by the operation was not
+ * successful, you will get an {@link IOException})
+ *
+ * @throws IOException
+ * in case of I/O error
*/
- public boolean encode(StringBuilder builder, Object value) {
- int prev = builder.length();
- String customString = toString(value);
- builder.append("custom:").append(getType()).append(":");
- if (!SerialUtils.encode(builder, customString)) {
- builder.delete(prev, builder.length());
+ public boolean encode(OutputStream out, Object value) throws IOException {
+ if (!isSupported(value)) {
return false;
}
+ SerialUtils.write(out, "custom^");
+ SerialUtils.write(out, getType());
+ SerialUtils.write(out, "^");
+ toStream(out, value);
+
return true;
}
- public Object decode(String encodedValue) {
+ public Object decode(String encodedValue) throws IOException {
return fromString((String) SerialUtils.decode(contentOf(encodedValue)));
}
public static boolean isCustom(String encodedValue) {
- int pos1 = encodedValue.indexOf(':');
- int pos2 = encodedValue.indexOf(':', pos1 + 1);
+ int pos1 = encodedValue.indexOf('^');
+ int pos2 = encodedValue.indexOf('^', pos1 + 1);
- return pos1 >= 0 && pos2 >= 0 && encodedValue.startsWith("custom:");
+ return pos1 >= 0 && pos2 >= 0 && encodedValue.startsWith("custom^");
}
public static String typeOf(String encodedValue) {
- int pos1 = encodedValue.indexOf(':');
- int pos2 = encodedValue.indexOf(':', pos1 + 1);
+ int pos1 = encodedValue.indexOf('^');
+ int pos2 = encodedValue.indexOf('^', pos1 + 1);
String type = encodedValue.substring(pos1 + 1, pos2);
return type;
}
public static String contentOf(String encodedValue) {
- int pos1 = encodedValue.indexOf(':');
- int pos2 = encodedValue.indexOf(':', pos1 + 1);
+ int pos1 = encodedValue.indexOf('^');
+ int pos2 = encodedValue.indexOf('^', pos1 + 1);
String encodedContent = encodedValue.substring(pos2 + 1);
return encodedContent;