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.streams.NextableInputStream;
+import be.nikiroo.utils.streams.NextableInputStreamStep;
+import be.nikiroo.utils.streams.ReplaceInputStream;
+import be.nikiroo.utils.streams.ReplaceOutputStream;
+
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)
+ *
+ * @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 void encode(OutputStream out, Object value) throws IOException {
+ ReplaceOutputStream replace = new ReplaceOutputStream(out, //
+ new String[] { "\\", "\n" }, //
+ new String[] { "\\\\", "\\n" });
- return true;
+ try {
+ SerialUtils.write(replace, "custom^");
+ SerialUtils.write(replace, getType());
+ SerialUtils.write(replace, "^");
+ toStream(replace, value);
+ } finally {
+ replace.close(false);
+ }
}
- public Object decode(String encodedValue) {
- return fromString((String) SerialUtils.decode(contentOf(encodedValue)));
+ public Object decode(InputStream in) throws IOException {
+ ReplaceInputStream replace = new ReplaceInputStream(in, //
+ new String[] { "\\\\", "\\n" }, //
+ new String[] { "\\", "\n" });
+
+ try {
+ NextableInputStream stream = new NextableInputStream(
+ replace.open(), 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");
+ }
+
+ return fromStream(stream);
+ } finally {
+ stream.close();
+ }
+ } finally {
+ replace.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;