package be.nikiroo.utils.serial;
import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import be.nikiroo.utils.IOUtils;
+import be.nikiroo.utils.NextableInputStream;
+import be.nikiroo.utils.NextableInputStreamStep;
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) throws IOException;
+ 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());
- return false;
- }
+ public boolean encode(OutputStream out, Object value) throws IOException {
+ SerialUtils.write(out, "custom^");
+ SerialUtils.write(out, getType());
+ SerialUtils.write(out, "^");
+ // TODO: manage ENTER
+ toStream(out, value);
return true;
}
- public Object decode(String encodedValue) throws IOException {
- return fromString((String) SerialUtils.decode(contentOf(encodedValue)));
+ public Object decode(InputStream in) throws IOException {
+ // TODO: manage ENTER
+ NextableInputStream stream = new NextableInputStream(in,
+ new NextableInputStreamStep('^'));
+
+ try {
+ if (!stream.next()) {
+ throw new IOException("Cannot find the first custom^ element");
+ }
+
+ String custom = IOUtils.readSmallStream(stream);
+ if (!"custom".equals(custom)) {
+ throw new IOException(
+ "Cannot find the first custom^ element, it is: "
+ + custom + "^");
+ }
+
+ if (!stream.next()) {
+ throw new IOException("Cannot find the second custom^"
+ + getType() + " element");
+ }
+
+ String type = IOUtils.readSmallStream(stream);
+ if (!getType().equals(type)) {
+ throw new IOException("Cannot find the second custom^"
+ + getType() + " element, it is: custom^" + type + "^");
+ }
+
+ if (!stream.nextAll()) {
+ throw new IOException("Cannot find the third custom^"
+ + getType() + "^value element");
+ }
+
+ // TODO: manage ENTER
+ return fromStream(stream);
+ } finally {
+ stream.close(false);
+ }
}
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;