package be.nikiroo.utils.serial;
import java.io.IOException;
+import java.io.InputStream;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
-import java.util.Scanner;
+import java.util.zip.GZIPInputStream;
-import be.nikiroo.utils.StringUtils;
+import be.nikiroo.utils.IOUtils;
+import be.nikiroo.utils.streams.Base64InputStream;
+import be.nikiroo.utils.streams.BufferedInputStream;
+import be.nikiroo.utils.streams.NextableInputStream;
+import be.nikiroo.utils.streams.NextableInputStreamStep;
/**
* A simple class that can accept the output of {@link Exporter} to recreate
private String currentFieldName;
+ /**
+ * Create a new {@link Importer}.
+ */
public Importer() {
map = new HashMap<String, Object>();
map.put("NULL", null);
* content, or a number of lines of it (any given line <b>MUST</b> be
* complete though) and accumulate it with the already present data.
*
- * @param data
+ * @param in
* the data to parse
*
* @return itself so it can be chained
* because it is not compatible with this code
* @throws ClassNotFoundException
* if a class described in the serialised data cannot be found
+ * @throws IOException
+ * if the content cannot be read (for instance, corrupt data)
+ * @throws NullPointerException
+ * if the stream is empty
*/
- public Importer read(String data) throws NoSuchFieldException,
- NoSuchMethodException, ClassNotFoundException {
+ public Importer read(InputStream in) throws NoSuchFieldException,
+ NoSuchMethodException, ClassNotFoundException, IOException,
+ NullPointerException {
+
+ NextableInputStream stream = new NextableInputStream(in,
+ new NextableInputStreamStep('\n'));
try {
- Scanner scan = new Scanner(data);
- scan.useDelimiter("\n");
- while (scan.hasNext()) {
- String line = scan.next();
+ if (in == null) {
+ throw new NullPointerException("InputStream is null");
+ }
- if (line.startsWith("ZIP:")) {
- line = StringUtils.unzip64(line.substring("ZIP:".length()));
+ boolean first = true;
+ while (stream.next()) {
+ if (stream.eof()) {
+ if (first) {
+ throw new NullPointerException(
+ "InputStream empty, normal termination");
+ }
+ return this;
}
- processLine(line);
+ first = false;
+
+ boolean zip = stream.startsWith("ZIP:");
+ boolean b64 = stream.startsWith("B64:");
+ if (zip || b64) {
+ stream.skip("XXX:".length());
+
+ InputStream decoded = stream.open();
+ if (zip) {
+ decoded = new GZIPInputStream(decoded);
+ }
+ decoded = new Base64InputStream(decoded, false);
+
+ try {
+ read(decoded);
+ } finally {
+ decoded.close();
+ }
+ } else {
+ processLine(stream);
+ }
}
- scan.close();
- } catch (IOException e) {
- throw new NoSuchMethodException(
- "Internal error when decoding ZIP content: input may be corrupt");
+ } finally {
+ stream.close(false);
}
return this;
* Read a single (whole) line of serialised data into this {@link Importer}
* and accumulate it with the already present data.
*
- * @param line
+ * @param in
* the line to parse
*
* @return TRUE if we are just done with one object or sub-object
* because it is not compatible with this code
* @throws ClassNotFoundException
* if a class described in the serialised data cannot be found
+ * @throws IOException
+ * if the content cannot be read (for instance, corrupt data)
*/
- private boolean processLine(String line) throws NoSuchFieldException,
- NoSuchMethodException, ClassNotFoundException {
+ private boolean processLine(BufferedInputStream in)
+ throws NoSuchFieldException, NoSuchMethodException,
+ ClassNotFoundException, IOException {
+
// Defer to latest child if any
if (child != null) {
- if (child.processLine(line)) {
+ if (child.processLine(in)) {
if (currentFieldName != null) {
setField(currentFieldName, child.getValue());
currentFieldName = null;
return false;
}
- if (line.equals("{")) { // START: new child if needed
+ // Start/Stop object
+ if (in.is("{")) { // START: new child if needed
if (link != null) {
child = new Importer(map);
}
- } else if (line.equals("}")) { // STOP: report self to parent
+ in.end();
+ return false;
+ } else if (in.is("}")) { // STOP: report self to parent
+ in.end();
return true;
- } else if (line.startsWith("REF ")) { // REF: create/link self
- String ref = line.substring(4).split("@")[1];
- link = map.containsKey(ref);
- if (link) {
- me = map.get(ref);
- } else {
- me = SerialUtils.createObject(line.substring(4).split("@")[0]);
- map.put(ref, me);
+ }
+
+ // Custom objects
+ if (CustomSerializer.isCustom(in)) {
+ // not a field value but a direct value
+ me = SerialUtils.decode(in);
+ return false;
+ }
+
+ // REF: (object)
+ if (in.startsWith("REF ")) { // REF: create/link self
+ // here, line is REF type@999:xxx
+ // xxx is optional
+
+ NextableInputStream stream = new NextableInputStream(in,
+ new NextableInputStreamStep(':'));
+ try {
+ stream.next();
+
+ stream.skip("REF ".length());
+ String header = IOUtils.readSmallStream(stream);
+
+ String[] tab = header.split("@");
+ if (tab.length != 2) {
+ throw new IOException("Bad import header line: " + header);
+ }
+ String type = tab[0];
+ String ref = tab[1];
+
+ stream.nextAll();
+
+ link = map.containsKey(ref);
+ if (link) {
+ me = map.get(ref);
+ stream.end();
+ } else {
+ if (stream.eof()) {
+ // construct
+ me = SerialUtils.createObject(type);
+ } else {
+ // direct value
+ me = SerialUtils.decode(stream);
+ }
+ map.put(ref, me);
+ }
+ } finally {
+ stream.close(false);
}
- } else { // FIELD: new field
- if (line.endsWith(":")) {
- // field value is compound
- currentFieldName = line.substring(0, line.length() - 1);
- } else {
- // field value is direct
- int pos = line.indexOf(":");
- String fieldName = line.substring(0, pos);
- String encodedValue = line.substring(pos + 1);
- Object value = null;
- value = SerialUtils.decode(encodedValue);
-
- // To support simple types directly:
- if (me == null) {
- me = value;
+
+ return false;
+ }
+
+ if (SerialUtils.isDirectValue(in)) {
+ // not a field value but a direct value
+ me = SerialUtils.decode(in);
+ return false;
+ }
+
+ if (in.startsWith("^")) {
+ in.skip(1);
+
+ NextableInputStream nameThenContent = new NextableInputStream(in,
+ new NextableInputStreamStep(':'));
+
+ try {
+ nameThenContent.next();
+ String fieldName = IOUtils.readSmallStream(nameThenContent);
+
+ if (nameThenContent.next() && !nameThenContent.eof()) {
+ // field value is direct or custom
+ Object value = null;
+ value = SerialUtils.decode(nameThenContent);
+
+ // To support simple types directly:
+ if (me == null) {
+ me = value;
+ } else {
+ setField(fieldName, value);
+ }
} else {
- setField(fieldName, value);
+ // field value is compound
+ currentFieldName = fieldName;
}
+ } finally {
+ nameThenContent.close(false);
}
+
+ return false;
}
- return false;
+ String line = IOUtils.readSmallStream(in);
+ throw new IOException("Line cannot be processed: <" + line + ">");
}
private void setField(String name, Object value)
git://git.nikiroo.be / nikiroo-utils.git / blobdiff