X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fbe%2Fnikiroo%2Futils%2Fserial%2FSerialUtils.java;h=ad3b5d4da2a8dae4955e12ce28f2cfd9a51fc5f7;hb=3519cb5c518d569235beaedfc3071cba45ec848d;hp=3770c588ce53bc25e77b623ee715da6aa58b937e;hpb=aad145868879e293dbe391c005c1a6885341529b;p=fanfix.git diff --git a/src/be/nikiroo/utils/serial/SerialUtils.java b/src/be/nikiroo/utils/serial/SerialUtils.java deleted file mode 100644 index 3770c58..0000000 --- a/src/be/nikiroo/utils/serial/SerialUtils.java +++ /dev/null @@ -1,299 +0,0 @@ -package be.nikiroo.utils.serial; - -import java.lang.reflect.Constructor; -import java.lang.reflect.Field; -import java.lang.reflect.InvocationTargetException; -import java.io.NotSerializableException; -import java.lang.reflect.Field; -import java.util.HashMap; -import java.util.Map; - -/** - * Small class to help serialise/deserialise objects. - *

- * Note that we do not support inner classes (but we do support nested classes) - * and all objects require an empty constructor to be deserialised. - * - * @author niki - */ -public class SerialUtils { - private static Map customTypes; - - static { - customTypes = new HashMap(); - // TODO: add "default" custom serialisers - } - - /** - * Create an empty object of the given type. - * - * @param type - * the object type (its class name) - * - * @return the new object - * - * @throws NoSuchMethodException if the given class is not compatible with this code - * @throws ClassNotFoundException if the class cannot be found or created - */ - public static Object createObject(String type) throws NoSuchMethodException, - ClassNotFoundException { - - try { - Class clazz = getClass(type); - if (clazz == null) { - throw new ClassNotFoundException("Class not found: " + type); - } - - String className = clazz.getName(); - Object[] args = null; - Constructor ctor = null; - if (className.contains("$")) { - Object javaParent = createObject(className.substring(0, - className.lastIndexOf('$'))); - args = new Object[] { javaParent }; - ctor = clazz.getDeclaredConstructor(new Class[] { javaParent - .getClass() }); - } else { - args = new Object[] {}; - ctor = clazz.getDeclaredConstructor(); - } - - ctor.setAccessible(true); - return ctor.newInstance(args); - } catch (NoSuchMethodException e) { - throw new NoSuchMethodException( - String.format( - "Objects of type \"%s\" cannot be created by this code: maybe the class" - + " or its enclosing class doesn't have an empty constructor?", - type)); - - } - catch (SecurityException e) { throw new ClassNotFoundException("Cannot instantiate: " + type, e); } - catch (InstantiationException e) { throw new ClassNotFoundException("Cannot instantiate: " + type, e); } - catch (IllegalAccessException e) { throw new ClassNotFoundException("Cannot instantiate: " + type, e); } - catch (IllegalArgumentException e) { throw new ClassNotFoundException("Cannot instantiate: " + type, e); } - catch (InvocationTargetException e) { throw new ClassNotFoundException("Cannot instantiate: " + type, e); } - } - - static public void addCustomSerializer(CustomSerializer serializer) { - customTypes.put(serializer.getType(), serializer); - } - - static void append(StringBuilder builder, Object o, Map map) - throws NotSerializableException { - - Field[] fields = new Field[] {}; - String type = ""; - String id = "NULL"; - - if (o != null) { - int hash = System.identityHashCode(o); - fields = o.getClass().getDeclaredFields(); - type = o.getClass().getCanonicalName(); - if (type == null) { - throw new NotSerializableException( - String.format( - "Cannot find the class for this object: %s (it could be an inner class, which is not supported)", - o)); - } - id = Integer.toString(hash); - if (map.containsKey(hash)) { - fields = new Field[] {}; - } else { - map.put(hash, o); - } - } - - builder.append("{\nREF ").append(type).append("@").append(id); - try { - for (Field field : fields) { - field.setAccessible(true); - - if (field.getName().startsWith("this$")) { - // Do not keep this links of nested classes - continue; - } - - builder.append("\n"); - builder.append(field.getName()); - builder.append(":"); - Object value; - - value = field.get(o); - - if (!encode(builder, value)) { - builder.append("\n"); - append(builder, value, map); - } - } - } catch (IllegalArgumentException e) { - e.printStackTrace(); // should not happen (see setAccessible) - } catch (IllegalAccessException e) { - e.printStackTrace(); // should not happen (see setAccessible) - } - builder.append("\n}"); - } - - // return true if encoded (supported) - static boolean encode(StringBuilder builder, Object value) { - if (value == null) { - builder.append("NULL"); - } else if (customTypes.containsKey(value.getClass().getCanonicalName())) { - customTypes.get(value.getClass().getCanonicalName())// - .encode(builder, value); - } else if (value instanceof String) { - encodeString(builder, (String) value); - } else if (value instanceof Boolean) { - builder.append(value); - } else if (value instanceof Byte) { - builder.append(value).append('b'); - } else if (value instanceof Character) { - encodeString(builder, (String) value); - builder.append('c'); - } else if (value instanceof Short) { - builder.append(value).append('s'); - } else if (value instanceof Integer) { - builder.append(value); - } else if (value instanceof Long) { - builder.append(value).append('L'); - } else if (value instanceof Float) { - builder.append(value).append('F'); - } else if (value instanceof Double) { - builder.append(value).append('d'); - } else { - return false; - } - - return true; - } - - static Object decode(String encodedValue) { - String cut = ""; - if (encodedValue.length() > 1) { - cut = encodedValue.substring(0, encodedValue.length() - 1); - } - - if (CustomSerializer.isCustom(encodedValue)) { - // custom:TYPE_NAME:"content is String-encoded" - String type = CustomSerializer.typeOf(encodedValue); - if (customTypes.containsKey(type)) { - return customTypes.get(type).decode(encodedValue); - } else { - throw new java.util.UnknownFormatConversionException( - "Unknown custom type: " + type); - } - } else if (encodedValue.equals("NULL") || encodedValue.equals("null")) { - return null; - } else if (encodedValue.endsWith("\"")) { - return decodeString(encodedValue); - } else if (encodedValue.equals("true")) { - return true; - } else if (encodedValue.equals("false")) { - return false; - } else if (encodedValue.endsWith("b")) { - return Byte.parseByte(cut); - } else if (encodedValue.endsWith("c")) { - return decodeString(cut).charAt(0); - } else if (encodedValue.endsWith("s")) { - return Short.parseShort(cut); - } else if (encodedValue.endsWith("L")) { - return Long.parseLong(cut); - } else if (encodedValue.endsWith("F")) { - return Float.parseFloat(cut); - } else if (encodedValue.endsWith("d")) { - return Double.parseDouble(cut); - } else { - return Integer.parseInt(encodedValue); - } - } - - static private Class getClass(String type) throws ClassNotFoundException, - NoSuchMethodException { - Class clazz = null; - try { - clazz = Class.forName(type); - } catch (ClassNotFoundException e) { - int pos = type.length(); - pos = type.lastIndexOf(".", pos); - if (pos >= 0) { - String parentType = type.substring(0, pos); - String nestedType = type.substring(pos + 1); - Class javaParent = null; - try { - javaParent = getClass(parentType); - parentType = javaParent.getName(); - clazz = Class.forName(parentType + "$" + nestedType); - } catch (Exception ee) { - } - - if (javaParent == null) { - throw new NoSuchMethodException( - "Class not found: " - + type - + " (the enclosing class cannot be created: maybe it doesn't have an empty constructor?)"); - } - } - } - - return clazz; - } - - // aa bb -> "aa\tbb" - private static void encodeString(StringBuilder builder, String raw) { - builder.append('\"'); - for (char car : raw.toCharArray()) { - switch (car) { - case '\\': - builder.append("\\\\"); - break; - case '\r': - builder.append("\\r"); - break; - case '\n': - builder.append("\\n"); - break; - case '"': - builder.append("\\\""); - break; - default: - builder.append(car); - break; - } - } - builder.append('\"'); - } - - // "aa\tbb" -> aa bb - private static String decodeString(String escaped) { - StringBuilder builder = new StringBuilder(); - - boolean escaping = false; - for (char car : escaped.toCharArray()) { - if (!escaping) { - if (car == '\\') { - escaping = true; - } else { - builder.append(car); - } - } else { - switch (car) { - case '\\': - builder.append('\\'); - break; - case 'r': - builder.append('\r'); - break; - case 'n': - builder.append('\n'); - break; - case '"': - builder.append('"'); - break; - } - escaping = false; - } - } - - return builder.substring(1, builder.length() - 1).toString(); - } -}