dataelement.java

java se平台蓝牙开发的插件 ,包括源码 根据readme 生成包很多东西可以自己DIY很实用

		case UUID:
			if (!(value instanceof UUID))
				throw new IllegalArgumentException();
			break;
		case U_INT_8:
			if (!(value instanceof byte[]) || ((byte[]) value).length != 8)
				throw new IllegalArgumentException();
			break;
		case U_INT_16:
		case INT_16:
			if (!(value instanceof byte[]) || ((byte[]) value).length != 16)
				throw new IllegalArgumentException();
			break;
		default:
			throw new IllegalArgumentException();
		}

		this.value = value;
		this.valueType = valueType;
	}

	/*
	 * Adds a DataElement to this DATALT or DATSEQ DataElement object. The elem
	 * will be added at the end of the list. The elem can be of any DataElement
	 * type, i.e., URL, NULL, BOOL, UUID, STRING, DATSEQ, DATALT, and the
	 * various signed and unsigned integer types. The same object may be added
	 * twice. If the object is successfully added the size of the DataElement is
	 * increased by one. Parameters: elem - the DataElement object to add
	 * Throws: ClassCastException - if the method is invoked on a DataElement
	 * whose type is not DATALT or DATSEQ NullPointerException - if elem is null
	 */

	public void addElement(DataElement elem) {
		if (elem == null)
			throw new NullPointerException();

		switch (valueType) {
		case DATALT:
		case DATSEQ:
			((Vector) value).addElement(elem);
			break;
		default:
			throw new ClassCastException();
		}
	}

	/*
	 * Inserts a DataElement at the specified location. This method can be
	 * invoked only on a DATALT or DATSEQ DataElement. elem can be of any
	 * DataElement type, i.e., URL, NULL, BOOL, UUID, STRING, DATSEQ, DATALT,
	 * and the various signed and unsigned integers. The same object may be
	 * added twice. If the object is successfully added the size will be
	 * increased by one. Each element with an index greater than or equal to the
	 * specified index is shifted upward to have an index one greater than the
	 * value it had previously. The index must be greater than or equal to 0 and
	 * less than or equal to the current size. Therefore, DATALT and DATSEQ are
	 * zero-based objects.
	 * 
	 * Parameters: elem - the DataElement object to add index - the location at
	 * which to add the DataElement Throws: ClassCastException - if the method
	 * is invoked on an instance of DataElement whose type is not DATALT or
	 * DATSEQ IndexOutOfBoundsException - if index is negative or greater than
	 * the size of the DATALT or DATSEQ NullPointerException - if elem is null
	 */

	public void insertElementAt(DataElement elem, int index) {
		if (elem == null)
			throw new NullPointerException();

		switch (valueType) {
		case DATALT:
		case DATSEQ:
			((Vector) value).insertElementAt(elem, index);
			break;
		default:
			throw new ClassCastException();
		}
	}

	/*
	 * Returns the number of DataElements that are present in this DATALT or
	 * DATSEQ object. It is possible that the number of elements is equal to
	 * zero. Returns: the number of elements in this DATALT or DATSEQ Throws:
	 * ClassCastException - if this object is not of type DATALT or DATSEQ
	 */

	public int getSize() {
		switch (valueType) {
		case DATALT:
		case DATSEQ:
			return ((Vector) value).size();
		default:
			throw new ClassCastException();
		}
	}

	/*
	 * Removes the first occurrence of the DataElement from this object. elem
	 * may be of any type, i.e., URL, NULL, BOOL, UUID, STRING, DATSEQ, DATALT,
	 * or the variously sized signed and unsigned integers. Only the first
	 * object in the list that is equal to elem will be removed. Other objects,
	 * if present, are not removed. Since this class doesn't override the
	 * equals() method of the Object class, the remove method compares only the
	 * references of objects. If elem is successfully removed the size of this
	 * DataElement is decreased by one. Each DataElement in the DATALT or DATSEQ
	 * with an index greater than the index of elem is shifted downward to have
	 * an index one smaller than the value it had previously. Parameters: elem -
	 * the DataElement to be removed Returns: true if the input value was found
	 * and removed; else false Throws: ClassCastException - if this object is
	 * not of type DATALT or DATSEQ NullPointerException - if elem is null
	 */

	public boolean removeElement(DataElement elem) {
		if (elem == null)
			throw new NullPointerException();

		switch (valueType) {
		case DATALT:
		case DATSEQ:
			return ((Vector) value).removeElement(elem);
		default:
			throw new ClassCastException();
		}
	}

	/*
	 * Returns the data type of the object this DataElement represents. Returns:
	 * the data type of this DataElement object; the legal return values are:
	 * URL, NULL, BOOL, UUID, STRING, DATSEQ, DATALT, U_INT_1, U_INT_2, U_INT_4,
	 * U_INT_8, U_INT_16, INT_1, INT_2, INT_4, INT_8, or INT_16
	 */

	public int getDataType() {
		return valueType;
	}

	/*
	 * Returns the value of the DataElement if it can be represented as a long.
	 * The data type of the object must be U_INT_1, U_INT_2, U_INT_4, INT_1,
	 * INT_2, INT_4, or INT_8. Returns: the value of the DataElement as a long
	 * Throws: ClassCastException - if the data type of the object is not
	 * U_INT_1, U_INT_2, U_INT_4, INT_1, INT_2, INT_4, or INT_8
	 */

	public long getLong() {
		switch (valueType) {
		case U_INT_1:
		case U_INT_2:
		case U_INT_4:
		case INT_1:
		case INT_2:
		case INT_4:
		case INT_8:
			return ((Long) value).longValue();
		default:
			throw new ClassCastException();
		}
	}

	/*
	 * Returns the value of the DataElement if it is represented as a boolean.
	 * Returns: the boolean value of this DataElement object Throws:
	 * ClassCastException - if the data type of this object is not of type BOOL
	 */

	public boolean getBoolean() {
		if (valueType == BOOL)
			return ((Boolean) value).booleanValue();
		else
			throw new ClassCastException();
	}

	/*
	 * Returns the value of this DataElement as an Object. This method returns
	 * the appropriate Java object for the following data types: URL, UUID,
	 * STRING, DATSEQ, DATALT, U_INT_8, U_INT_16, and INT_16. Modifying the
	 * returned Object will not change this DataElement. The following are the
	 * legal pairs of data type and Java object type being returned. DataElement
	 * Data Type Java Data Type URL java.lang.String UUID javax.bluetooth.UUID
	 * STRING java.lang.String DATSEQ java.util.Enumeration DATALT
	 * java.util.Enumeration U_INT_8 byte[] of length 8 U_INT_16 byte[] of
	 * length 16 INT_16 byte[] of length 16
	 * 
	 * Returns: the value of this object Throws: ClassCastException - if the
	 * object is not a URL, UUID, STRING, DATSEQ, DATALT, U_INT_8, U_INT_16, or
	 * INT_16
	 */

	public Object getValue() {
		switch (valueType) {
		case URL:
		case STRING:
		case UUID:
		case U_INT_8:
		case U_INT_16:
		case INT_16:
			return value;
		case DATSEQ:
		case DATALT:
			return ((Vector) value).elements();
		default:
			throw new ClassCastException();
		}
	}

	public String toString() {
		switch (valueType) {
		case U_INT_1:
		case U_INT_2:
		case U_INT_4:
		case INT_1:
		case INT_2:
		case INT_4:
		case INT_8:
			return "0x" + Long.toHexString(((Long) value).longValue());
		case BOOL:
		case URL:
		case STRING:
		case UUID:
			return value.toString();
		case U_INT_8:
		case U_INT_16:
		case INT_16: {
			byte[] b = (byte[]) value;

			StringBuffer buf = new StringBuffer();

			for (int i = 0; i < b.length; i++) {
				buf.append(Integer.toHexString(b[i] >> 4 & 0xf));
				buf.append(Integer.toHexString(b[i] & 0xf));
			}

			return buf.toString();
		}
		case DATSEQ: {
			StringBuffer buf = new StringBuffer("DATSEQ {\n");

			for (Enumeration e = ((Vector) value).elements(); e
					.hasMoreElements();) {
				buf.append(e.nextElement());
				buf.append("\n");
			}

			buf.append("}");

			return buf.toString();
		}
		case DATALT: {
			StringBuffer buf = new StringBuffer("DATALT {\n");

			for (Enumeration e = ((Vector) value).elements(); e
					.hasMoreElements();) {
				buf.append(e.nextElement());
				buf.append("\n");
			}

			buf.append("}");

			return buf.toString();
		}
		default:
			return "???";
		}
	}
}