+++ /dev/null
-package be.nikiroo.utils.serial;
-
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
-import java.lang.reflect.Field;
-import java.util.HashMap;
-import java.util.Map;
-
-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 {
- static private Integer SIZE_ID = null;
- static private byte[] NEWLINE = null;
-
- private Boolean link;
- private Object me;
- private Importer child;
- private Map<String, Object> map;
-
- private String currentFieldName;
-
- static {
- try {
- SIZE_ID = "EXT:".getBytes("UTF-8").length;
- NEWLINE = "\n".getBytes("UTF-8");
- } catch (UnsupportedEncodingException e) {
- // UTF-8 is mandated to exist on confirming jre's
- }
- }
-
- /**
- * 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 {
- return read(data.getBytes("UTF-8"), 0);
- }
-
- /**
- * 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
- * @param offset
- * the offset at which to start reading the data (we ignore
- * anything that goes before that offset)
- *
- * @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)
- */
- private Importer read(byte[] data, int offset) throws NoSuchFieldException,
- NoSuchMethodException, ClassNotFoundException, IOException {
-
- int dataStart = offset;
- while (dataStart < data.length) {
- String id = "";
- if (data.length - dataStart >= SIZE_ID) {
- id = new String(data, dataStart, SIZE_ID);
- }
-
- boolean zip = id.equals("ZIP:");
- boolean b64 = id.equals("B64:");
- if (zip || b64) {
- dataStart += SIZE_ID;
- }
-
- int count = find(data, dataStart, NEWLINE);
- count -= dataStart;
- if (count < 0) {
- count = data.length - dataStart;
- }
-
- if (zip || b64) {
- boolean unpacked = false;
- try {
- byte[] line = StringUtils.unbase64(data, dataStart, count,
- zip);
- unpacked = true;
- read(line, 0);
- } catch (IOException e) {
- throw new IOException("Internal error when decoding "
- + (unpacked ? "unpacked " : "")
- + (zip ? "ZIP" : "B64")
- + " content: input may be corrupt");
- }
- } else {
- String line = new String(data, dataStart, count, "UTF-8");
- processLine(line);
- }
-
- dataStart += count + NEWLINE.length;
- }
-
- 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(":")
- || line.startsWith("\"") || CustomSerializer.isCustom(line)) {
- // 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()));
- }
- }
-
- /**
- * Find the given needle in the data and return its position (or -1 if not
- * found).
- *
- * @param data
- * the data to look through
- * @param offset
- * the offset at wich to start searching
- * @param needle
- * the needle to find
- *
- * @return the position of the needle if found, -1 if not found
- */
- private int find(byte[] data, int offset, byte[] needle) {
- for (int i = offset; i + needle.length - 1 < data.length; i++) {
- boolean same = true;
- for (int j = 0; j < needle.length; j++) {
- if (data[i + j] != needle[j]) {
- same = false;
- break;
- }
- }
-
- if (same) {
- return i;
- }
- }
-
- return -1;
- }
-
- /**
- * Return the current deserialised value.
- *
- * @return the current value
- */
- public Object getValue() {
- return me;
- }
-}
\ No newline at end of file
git://git.nikiroo.be / fanfix.git / blobdiff