+++ /dev/null
-package be.nikiroo.utils.serial;
-
-import java.io.IOException;
-import java.lang.reflect.Field;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Scanner;
-
-import be.nikiroo.utils.StringUtils;
-
-/**
- * A simple class that can accept the output of {@link Exporter} to recreate
- * objects as they were sent to said exporter.
- * <p>
- * This class requires the objects (and their potential enclosing objects) to
- * have an empty constructor, and does not support inner classes (it does
- * support nested classes, though).
- *
- * @author niki
- */
-public class Importer {
- private Boolean link;
- private Object me;
- private Importer child;
- private Map<String, Object> map;
-
- private String currentFieldName;
-
- /**
- * Create a new {@link Importer}.
- */
- public Importer() {
- map = new HashMap<String, Object>();
- map.put("NULL", null);
- }
-
- private Importer(Map<String, Object> map) {
- this.map = map;
- }
-
- /**
- * Read some data into this {@link Importer}: it can be the full serialised
- * 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
- * the data to parse
- *
- * @return itself so it can be chained
- *
- * @throws NoSuchFieldException
- * if the serialised data contains information about a field
- * which does actually not exist in the class we know of
- * @throws NoSuchMethodException
- * if a class described in the serialised data cannot be created
- * 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)
- */
- public Importer read(String data) throws NoSuchFieldException,
- NoSuchMethodException, ClassNotFoundException, IOException {
-
- Scanner scan = new Scanner(data);
- try {
- scan.useDelimiter("\n");
- while (scan.hasNext()) {
- String line = scan.next();
-
- if (line.startsWith("ZIP:")) {
- try {
- line = StringUtils.unzip64(line.substring("ZIP:"
- .length()));
- } catch (IOException e) {
- throw new IOException(
- "Internal error when decoding ZIP content: input may be corrupt");
- }
- read(line);
- } else {
- processLine(line);
- }
- }
- } finally {
- scan.close();
- }
-
- return this;
- }
-
- /**
- * Read a single (whole) line of serialised data into this {@link Importer}
- * and accumulate it with the already present data.
- *
- * @param line
- * the line to parse
- *
- * @return TRUE if we are just done with one object or sub-object
- *
- * @throws NoSuchFieldException
- * if the serialised data contains information about a field
- * which does actually not exist in the class we know of
- * @throws NoSuchMethodException
- * if a class described in the serialised data cannot be created
- * 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, IOException {
- // Defer to latest child if any
- if (child != null) {
- if (child.processLine(line)) {
- if (currentFieldName != null) {
- setField(currentFieldName, child.getValue());
- currentFieldName = null;
- }
- child = null;
- }
-
- return false;
- }
-
- if (line.equals("{")) { // START: new child if needed
- if (link != null) {
- child = new Importer(map);
- }
- } else if (line.equals("}")) { // STOP: report self to parent
- return true;
- } else if (line.startsWith("REF ")) { // REF: create/link self
- String[] tab = line.substring("REF ".length()).split("@");
- String type = tab[0];
- tab = tab[1].split(":");
- String ref = tab[0];
-
- link = map.containsKey(ref);
- if (link) {
- me = map.get(ref);
- } else {
- if (line.endsWith(":")) {
- // construct
- me = SerialUtils.createObject(type);
- } else {
- // direct value
- int pos = line.indexOf(":");
- String encodedValue = line.substring(pos + 1);
- me = SerialUtils.decode(encodedValue);
- }
- map.put(ref, me);
- }
- } else { // FIELD: new field *or* direct simple value
- if (line.endsWith(":")) {
- // field value is compound
- currentFieldName = line.substring(0, line.length() - 1);
- } else if (line.startsWith(":") || !line.contains(":")) {
- // not a field value but a direct value
- me = SerialUtils.decode(line);
- } 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;
- } else {
- setField(fieldName, value);
- }
- }
- }
-
- return false;
- }
-
- private void setField(String name, Object value)
- throws NoSuchFieldException {
-
- try {
- Field field = me.getClass().getDeclaredField(name);
-
- field.setAccessible(true);
- field.set(me, value);
- } catch (NoSuchFieldException e) {
- throw new NoSuchFieldException(String.format(
- "Field \"%s\" was not found in object of type \"%s\".",
- name, me.getClass().getCanonicalName()));
- } catch (Exception e) {
- throw new NoSuchFieldException(String.format(
- "Internal error when setting \"%s.%s\": %s", me.getClass()
- .getCanonicalName(), name, e.getMessage()));
- }
- }
-
- /**
- * Return the current deserialised value.
- *
- * @return the current value
- */
- public Object getValue() {
- return me;
- }
-}
\ No newline at end of file
git://git.nikiroo.be / nikiroo-utils.git / blobdiff