Java 类org.mozilla.javascript.ConsString 实例源码

@Override
protected Object hashKey(Object key) {
    if (key instanceof ConsString) {
        // ConsString -> String
        return ((ConsString) key).toString();
    }
    if (key instanceof Integer) {
        // int -> double
        return (double) (Integer) key;
    }
    if (key instanceof Long) {
        // long -> double
        return (double) (Long) key;
    }
    if (key instanceof Double) {
        // Map +/-0 to +0 to enforce SameValueZero comparison semantics.
        double v = (Double) key;
        return v == 0 ? +0d : v;
    }
    if (key instanceof SIMDValue) {
        // Map +/-0 to +0 to enforce SameValueZero comparison semantics.
        return hashKeySIMD((SIMDValue) key);
    }
    return key;
}

/**
 * 12.8 Additive Operators<br>
 * 12.8.3 The Addition operator ( + )
 * 
 * @param lstr
 *            the left-hand side operand
 * @param rstr
 *            the right-hand side operand
 * @param cx
 *            the execution context
 * @return the concatenated string
 */
public static CharSequence add(CharSequence lstr, CharSequence rstr, ExecutionContext cx) {
    int llen = lstr.length(), rlen = rstr.length();
    if (llen == 0) {
        return rstr;
    }
    if (rlen == 0) {
        return lstr;
    }
    int newlen = llen + rlen;
    if (newlen < 0 || newlen > StringObject.MAX_LENGTH) {
        throw newInternalError(cx, Messages.Key.InvalidStringSize);
    }
    if (newlen <= 10) {
        // return new StringBuilder(newlen).append(lstr).append(rstr).toString();
        return inlineString(lstr, rstr, llen, rlen);
    }
    return new ConsString(lstr, rstr);
}

/**
 * Returns a {@link ScriptIterator} for {@code iterable}.
 * 
 * @param cx
 *            the execution context
 * @param iterable
 *            the iterable object
 * @param method
 *            the iterator method
 * @return the iterator object or {@code null}
 */
public static ScriptIterator<?> GetScriptIterator(ExecutionContext cx, Object iterable, Callable method) {
    if (iterable instanceof ArrayObject) {
        ArrayObject array = (ArrayObject) iterable;
        if (ArrayScriptIterator.isBuiltinIterator(cx, array, method)) {
            return new ArrayScriptIterator(cx, array);
        }
    } else if (iterable instanceof TypedArrayObject) {
        TypedArrayObject typedArray = (TypedArrayObject) iterable;
        if (TypedArrayScriptIterator.isBuiltinIterator(cx, typedArray, method)) {
            return new TypedArrayScriptIterator(cx, typedArray);
        }
    } else if (iterable instanceof String || iterable instanceof ConsString) {
        if (StringScriptIterator.isBuiltinIterator(cx, method)) {
            return new StringScriptIterator(cx, iterable.toString());
        }
    } else if (iterable instanceof MapObject) {
        MapObject map = (MapObject) iterable;
        if (MapScriptIterator.isBuiltinIterator(cx, map, method)) {
            return new MapScriptIterator(cx, map);
        }
    } else if (iterable instanceof SetObject) {
        SetObject set = (SetObject) iterable;
        if (SetScriptIterator.isBuiltinIterator(cx, set, method)) {
            return new SetScriptIterator(cx, set);
        }
    } else if (iterable instanceof ArgumentsObject) {
        ArgumentsObject arguments = (ArgumentsObject) iterable;
        if (ArgumentsScriptIterator.isBuiltinIterator(cx, arguments, method)) {
            return new ArgumentsScriptIterator(cx, arguments);
        }
    }
    return null;
}

/**
 * 7.1.12 ToString ( argument )
 * 
 * @param cx
 *            the execution context
 * @param value
 *            the argument value
 * @return the string result
 */
public static String ToFlatString(ExecutionContext cx, Object value) {
    // Inlined: `if (Type.isString(value)) return Type.stringValue(value);`
    if (value instanceof String) {
        return (String) value;
    }
    if (value instanceof ConsString) {
        return ((ConsString) value).toString();
    }
    return ToStringSlow(cx, value).toString();
}

/**
 * 7.1.12 ToString ( argument )
 * 
 * @param cx
 *            the execution context
 * @param value
 *            the argument value
 * @return the string result
 */
public static CharSequence ToString(ExecutionContext cx, Object value) {
    // Inlined: `if (Type.isString(value)) return Type.stringValue(value);`
    if (value instanceof String) {
        return (String) value;
    }
    if (value instanceof ConsString) {
        return (ConsString) value;
    }
    return ToStringSlow(cx, value);
}

@Override
public byte[] toBytes(CharSequence cs) {
    if (cs instanceof ConsString) {
        return ((ConsString) cs).toByteArray(new byte[cs.length() * 2 + 2]);
    }
    return toBytes(cs.toString());
}

@Override
public byte[] toBytes(CharSequence cs) {
    if (cs instanceof ConsString) {
        return ((ConsString) cs).toByteArray(new byte[cs.length() * 2 + 2]);
    }
    return toBytes(cs.toString());
}

public void testConsStringSerialization() throws IOException, ClassNotFoundException {

    ConsString r1 = new ConsString("foo", "bar");

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(baos);

    oos.writeObject(r1);

    oos.flush();

    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

    ObjectInputStream ois = new ObjectInputStream(bais);

    CharSequence r2 = (CharSequence) ois.readObject();

    assertEquals("still the same at the other end", r1.toString(), r2.toString());

}

public void testConsStringSerialization() throws IOException, ClassNotFoundException {

    ConsString r1 = new ConsString("foo", "bar");

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(baos);

    oos.writeObject(r1);

    oos.flush();

    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

    ObjectInputStream ois = new ObjectInputStream(bais);

    CharSequence r2 = (CharSequence) ois.readObject();

    assertEquals("still the same at the other end", r1.toString(), r2.toString());

}

public void testConsStringSerialization() throws IOException, ClassNotFoundException {

    ConsString r1 = new ConsString("foo", "bar");

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(baos);

    oos.writeObject(r1);

    oos.flush();

    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

    ObjectInputStream ois = new ObjectInputStream(bais);

    CharSequence r2 = (CharSequence) ois.readObject();

    assertEquals("still the same at the other end", r1.toString(), r2.toString());

}

public void testConsStringSerialization() throws IOException, ClassNotFoundException {

      ConsString r1 = new ConsString("foo", "bar");

      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      ObjectOutputStream oos = new ObjectOutputStream(baos);

      oos.writeObject(r1);

      oos.flush();

      ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

      ObjectInputStream ois = new ObjectInputStream(bais);

      CharSequence r2 = (CharSequence) ois.readObject();

      assertEquals("still the same at the other end", r1.toString(), r2.toString());

  }

public void testConsStringSerialization() throws IOException, ClassNotFoundException {

    ConsString r1 = new ConsString("foo", "bar");

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(baos);

    oos.writeObject(r1);

    oos.flush();

    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

    ObjectInputStream ois = new ObjectInputStream(bais);

    CharSequence r2 = (CharSequence) ois.readObject();

    assertEquals("still the same at the other end", r1.toString(), r2.toString());

}

/**
 * Returns a {@link ScriptIterator} for {@code iterable}.
 * 
 * @param cx
 *            the execution context
 * @param iterable
 *            the iterable object
 * @return the iterator object or {@code null}
 */
public static ScriptIterator<?> GetScriptIterator(ExecutionContext cx, Object iterable) {
    if (iterable instanceof ArrayObject) {
        ArrayObject array = (ArrayObject) iterable;
        if (ArrayScriptIterator.isBuiltinIterator(cx, array)) {
            return new ArrayScriptIterator(cx, array);
        }
    } else if (iterable instanceof ArrayIteratorObject) {
        ArrayIteratorObject arrayIterator = (ArrayIteratorObject) iterable;
        if (ArrayIteratorScriptIterator.isBuiltinIterator(cx, arrayIterator)) {
            return new ArrayIteratorScriptIterator(cx, arrayIterator);
        }
    } else if (iterable instanceof TypedArrayObject) {
        TypedArrayObject typedArray = (TypedArrayObject) iterable;
        if (TypedArrayScriptIterator.isBuiltinIterator(cx, typedArray)) {
            return new TypedArrayScriptIterator(cx, typedArray);
        }
    } else if (iterable instanceof String || iterable instanceof ConsString) {
        if (StringScriptIterator.isBuiltinIterator(cx)) {
            return new StringScriptIterator(cx, iterable.toString());
        }
    } else if (iterable instanceof MapObject) {
        MapObject map = (MapObject) iterable;
        if (MapScriptIterator.isBuiltinIterator(cx, map)) {
            return new MapScriptIterator(cx, map);
        }
    } else if (iterable instanceof MapIteratorObject) {
        MapIteratorObject mapIterator = (MapIteratorObject) iterable;
        if (MapIteratorScriptIterator.isBuiltinIterator(cx, mapIterator)) {
            return new MapIteratorScriptIterator(cx, mapIterator);
        }
    } else if (iterable instanceof SetObject) {
        SetObject set = (SetObject) iterable;
        if (SetScriptIterator.isBuiltinIterator(cx, set)) {
            return new SetScriptIterator(cx, set);
        }
    } else if (iterable instanceof SetIteratorObject) {
        SetIteratorObject setIterator = (SetIteratorObject) iterable;
        if (SetIteratorScriptIterator.isBuiltinIterator(cx, setIterator)) {
            return new SetIteratorScriptIterator(cx, setIterator);
        }
    } else if (iterable instanceof ArgumentsObject) {
        ArgumentsObject arguments = (ArgumentsObject) iterable;
        if (ArgumentsScriptIterator.isBuiltinIterator(cx, arguments)) {
            return new ArgumentsScriptIterator(cx, arguments);
        }
    } else if (iterable instanceof GeneratorObject) {
        GeneratorObject generator = (GeneratorObject) iterable;
        if (GeneratorScriptIterator.isBuiltinIterator(cx, generator)) {
            return new GeneratorScriptIterator(cx, generator);
        }
    }
    return null;
}

/**
 * Converts java representation into nearest JavaScript representation.
 * 
 * @param value Value to be converted.
 * @param scope Scope where is the value.
 * @return Converted object.
 */
public static Object javaToJS(Object value, Scriptable scope) {
    if (value instanceof ConsString) {
        value = value.toString();
    }
    return Context.javaToJS(value, scope);
   }

/**
 * Converts java representation into nearest JavaScript representation.
 * 
 * @param value Value to be converted.
 * @param scope Scope where is the value.
 * @return Converted object.
 */
public static Object javaToJS(Object value, Scriptable scope) {
    if (value instanceof ConsString) {
        value = value.toString();
    }
    return Context.javaToJS(value, scope);
   }