appendingstringbuffer.java

Wicket一个开发Java Web应用程序框架。它使得开发web应用程序变得容易而轻松。 Wicket利用一个POJO data beans组件使得它可以与任何持久层技术相结合。

	 * @param end
	 *            the end index, exclusive.
	 * @return the specified subsequence.
	 * 
	 * @throws IndexOutOfBoundsException
	 *             if <tt>start</tt> or <tt>end</tt> are negative, if <tt>end</tt> is greater
	 *             than <tt>length()</tt>, or if <tt>start</tt> is greater than <tt>end</tt>
	 * 
	 * @since 1.4
	 * @spec JSR-51
	 */
	public CharSequence subSequence(int start, int end)
	{
		return this.substring(start, end);
	}

	/**
	 * Returns a new <code>String</code> that contains a subsequence of characters currently
	 * contained in this <code>AppendingStringBuffer</code>. The substring begins at the
	 * specified <code>start</code> and extends to the character at index <code>end - 1</code>.
	 * An exception is thrown if
	 * 
	 * @param start
	 *            The beginning index, inclusive.
	 * @param end
	 *            The ending index, exclusive.
	 * @return The new string.
	 * @exception StringIndexOutOfBoundsException
	 *                if <code>start</code> or <code>end</code> are negative or greater than
	 *                <code>length()</code>, or <code>start</code> is greater than
	 *                <code>end</code>.
	 * @since 1.2
	 */
	public String substring(int start, int end)
	{
		if (start < 0)
		{
			throw new StringIndexOutOfBoundsException(start);
		}
		if (end > count)
		{
			throw new StringIndexOutOfBoundsException(end);
		}
		if (start > end)
		{
			throw new StringIndexOutOfBoundsException(end - start);
		}
		return new String(value, start, end - start);
	}

	/**
	 * Inserts the string representation of a subarray of the <code>str</code> array argument into
	 * this string buffer. The subarray begins at the specified <code>offset</code> and extends
	 * <code>len</code> characters. The characters of the subarray are inserted into this string
	 * buffer at the position indicated by <code>index</code>. The length of this
	 * <code>AppendingStringBuffer</code> increases by <code>len</code> characters.
	 * 
	 * @param index
	 *            position at which to insert subarray.
	 * @param str
	 *            A character array.
	 * @param offset
	 *            the index of the first character in subarray to to be inserted.
	 * @param len
	 *            the number of characters in the subarray to to be inserted.
	 * @return This string buffer.
	 * @exception StringIndexOutOfBoundsException
	 *                if <code>index</code> is negative or greater than <code>length()</code>,
	 *                or <code>offset</code> or <code>len</code> are negative, or
	 *                <code>(offset+len)</code> is greater than <code>str.length</code>.
	 * @since 1.2
	 */
	public AppendingStringBuffer insert(int index, char str[], int offset, int len)
	{
		if ((index < 0) || (index > count))
		{
			throw new StringIndexOutOfBoundsException();
		}
		if ((offset < 0) || (offset + len < 0) || (offset + len > str.length))
		{
			throw new StringIndexOutOfBoundsException(offset);
		}
		if (len < 0)
		{
			throw new StringIndexOutOfBoundsException(len);
		}
		int newCount = count + len;
		if (newCount > value.length)
		{
			expandCapacity(newCount);
		}
		System.arraycopy(value, index, value, index + len, count - index);
		System.arraycopy(str, offset, value, index, len);
		count = newCount;
		return this;
	}

	/**
	 * Inserts the string representation of the <code>Object</code> argument into this string
	 * buffer.
	 * <p>
	 * The second argument is converted to a string as if by the method <code>String.valueOf</code>,
	 * and the characters of that string are then inserted into this string buffer at the indicated
	 * offset.
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or
	 * equal to the length of this string buffer.
	 * 
	 * @param offset
	 *            the offset.
	 * @param obj
	 *            an <code>Object</code>.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception StringIndexOutOfBoundsException
	 *                if the offset is invalid.
	 * @see java.lang.String#valueOf(java.lang.Object)
	 * @see AppendingStringBuffer#insert(int, java.lang.String)
	 * @see AppendingStringBuffer#length()
	 */
	public AppendingStringBuffer insert(int offset, Object obj)
	{
		if (obj instanceof AppendingStringBuffer)
		{
			AppendingStringBuffer asb = (AppendingStringBuffer)obj;
			return insert(offset, asb.value, 0, asb.count);
		}
		else if (obj instanceof StringBuffer)
		{
			return insert(offset, (StringBuffer)obj);
		}
		return insert(offset, String.valueOf(obj));
	}

	/**
	 * Inserts the string into this string buffer.
	 * <p>
	 * The characters of the <code>String</code> argument are inserted, in order, into this string
	 * buffer at the indicated offset, moving up any characters originally above that position and
	 * increasing the length of this string buffer by the length of the argument. If
	 * <code>str</code> is <code>null</code>, then the four characters <code>"null"</code>
	 * are inserted into this string buffer.
	 * <p>
	 * The character at index <i>k</i> in the new character sequence is equal to:
	 * <ul>
	 * <li>the character at index <i>k</i> in the old character sequence, if <i>k</i> is less
	 * than <code>offset</code>
	 * <li>the character at index <i>k</i><code>-offset</code> in the argument <code>str</code>,
	 * if <i>k</i> is not less than <code>offset</code> but is less than
	 * <code>offset+str.length()</code>
	 * <li>the character at index <i>k</i><code>-str.length()</code> in the old character
	 * sequence, if <i>k</i> is not less than <code>offset+str.length()</code>
	 * </ul>
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or
	 * equal to the length of this string buffer.
	 * 
	 * @param offset
	 *            the offset.
	 * @param str
	 *            a string.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception StringIndexOutOfBoundsException
	 *                if the offset is invalid.
	 * @see java.lang.StringBuffer#length()
	 */
	public AppendingStringBuffer insert(int offset, String str)
	{
		if ((offset < 0) || (offset > count))
		{
			throw new StringIndexOutOfBoundsException();
		}

		if (str == null)
		{
			str = String.valueOf(str);
		}
		int len = str.length();
		int newcount = count + len;
		if (newcount > value.length)
		{
			expandCapacity(newcount);
		}
		System.arraycopy(value, offset, value, offset + len, count - offset);
		str.getChars(0, len, value, offset);
		count = newcount;
		return this;
	}

	/**
	 * Inserts the string into this string buffer.
	 * <p>
	 * The characters of the <code>String</code> argument are inserted, in order, into this string
	 * buffer at the indicated offset, moving up any characters originally above that position and
	 * increasing the length of this string buffer by the length of the argument. If
	 * <code>str</code> is <code>null</code>, then the four characters <code>"null"</code>
	 * are inserted into this string buffer.
	 * <p>
	 * The character at index <i>k</i> in the new character sequence is equal to:
	 * <ul>
	 * <li>the character at index <i>k</i> in the old character sequence, if <i>k</i> is less
	 * than <code>offset</code>
	 * <li>the character at index <i>k</i><code>-offset</code> in the argument <code>str</code>,
	 * if <i>k</i> is not less than <code>offset</code> but is less than
	 * <code>offset+str.length()</code>
	 * <li>the character at index <i>k</i><code>-str.length()</code> in the old character
	 * sequence, if <i>k</i> is not less than <code>offset+str.length()</code>
	 * </ul>
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or
	 * equal to the length of this string buffer.
	 * 
	 * @param offset
	 *            the offset.
	 * @param str
	 *            a string.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception StringIndexOutOfBoundsException
	 *                if the offset is invalid.
	 * @see java.lang.StringBuffer#length()
	 */
	public AppendingStringBuffer insert(int offset, StringBuffer str)
	{
		if ((offset < 0) || (offset > count))
		{
			throw new StringIndexOutOfBoundsException();
		}

		if (str == null)
		{
			str = SB_NULL;
		}
		int len = str.length();
		int newcount = count + len;
		if (newcount > value.length)
		{
			expandCapacity(newcount);
		}
		System.arraycopy(value, offset, value, offset + len, count - offset);
		str.getChars(0, len, value, offset);
		count = newcount;
		return this;
	}

	/**
	 * Inserts the string representation of the <code>char</code> array argument into this string
	 * buffer.
	 * <p>
	 * The characters of the array argument are inserted into the contents of this string buffer at
	 * the position indicated by <code>offset</code>. The length of this string buffer increases
	 * by the length of the argument.
	 * <p>
	 * The overall effect is exactly as if the argument were converted to a string by the method
	 * {@link String#valueOf(char[])} and the characters of that string were then
	 * {@link #insert(int,String) inserted} into this <code>AppendingStringBuffer</code> object at
	 * the position indicated by <code>offset</code>.
	 * 
	 * @param offset
	 *            the offset.
	 * @param str
	 *            a character array.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception StringIndexOutOfBoundsException
	 *                if the offset is invalid.
	 */
	public AppendingStringBuffer insert(int offset, char str[])
	{
		if ((offset < 0) || (offset > count))
		{
			throw new StringIndexOutOfBoundsException();
		}
		int len = str.length;
		int newcount = count + len;
		if (newcount > value.length)
		{
			expandCapacity(newcount);
		}
		System.arraycopy(value, offset, value, offset + len, count - offset);
		System.arraycopy(str, 0, value, offset, len);
		count = newcount;
		return this;
	}

	/**
	 * Inserts the string representation of the <code>boolean</code> argument into this string
	 * buffer.
	 * <p>
	 * The second argument is converted to a string as if by the method <code>String.valueOf</code>,
	 * and the characters of that string are then inserted into this string buffer at the indicated
	 * offset.
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or
	 * equal to the length of this string buffer.
	 * 
	 * @param offset
	 *            the offset.
	 * @param b
	 *            a <code>boolean</code>.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception StringIndexOutOfBoundsException
	 *                if the offset is invalid.
	 * @see java.lang.String#valueOf(boolean)
	 * @see java.lang.StringBuffer#insert(int, java.lang.String)
	 * @see java.lang.StringBuffer#length()
	 */
	public AppendingStringBuffer insert(int offset, boolean b)
	{
		return insert(offset, String.valueOf(b));
	}

	/**
	 * Inserts the string representation of the <code>char</code> argument into this string
	 * buffer.
	 * <p>
	 * The second argument is inserted into the contents of this string buffer at the position
	 * indicated by <code>offset</code>. The length of this string buffer increases by one.
	 * <p>
	 * The overall effect is exactly as if the argument were converted to a string by the method
	 * {@link String#valueOf(char)} and the character in that string were then
	 * {@link #insert(int, String) inserted} into this <code>AppendingStringBuffer</code> object
	 * at the position indicated by <code>offset</code>.
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or
	 * equal to the length of this string buffer.
	 * 
	 * @param offset
	 *            the offset.
	 * @param c
	 *            a <code>char</code>.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception IndexOutOfBoundsException
	 *                if the offset is invalid.
	 * @see java.lang.StringBuffer#length()
	 */
	public AppendingStringBuffer insert(int offset, char c)
	{
		int newcount = count + 1;
		if (newcount > value.length)
		{
			expandCapacity(newcount);
		}
		System.arraycopy(value, offset, value, offset + 1, count - offset);
		value[offset] = c;
		count = newcount;
		return this;
	}

	/**
	 * Inserts the string representation of the second <code>int</code> argument into this string
	 * buffer.
	 * <p>
	 * The second argument is converted to a string as if by the method <code>String.valueOf</code>,
	 * and the characters of that string are then inserted into this string buffer at the indicated
	 * offset.
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or
	 * equal to the length of this string buffer.
	 * 
	 * @param offset
	 *            the offset.
	 * @param i
	 *            an <code>int</code>.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception StringIndexOutOfBoundsException
	 *                if the offset is invalid.
	 * @see java.lang.String#valueOf(int)
	 * @see java.lang.StringBuffer#insert(int, java.lang.String)
	 * @see java.lang.StringBuffer#length()
	 */
	public AppendingStringBuffer insert(int offset, int i)
	{
		return insert(offset, String.valueOf(i));
	}

	/**
	 * Inserts the string representation of the <code>long</code> argument into this string
	 * buffer.
	 * <p>
	 * The second argument is converted to a string as if by the method <code>String.valueOf</code>,
	 * and the characters of that string are then inserted into this string buffer at the position
	 * indicated by <code>offset</code>.
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or
	 * equal to the length of this string buffer.
	 * 
	 * @param offset
	 *            the offset.
	 * @param l
	 *            a <code>long</code>.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception StringIndexOutOfBoundsException
	 *                if the offset is invalid.
	 * @see java.lang.String#valueOf(long)
	 * @see java.lang.StringBuffer#insert(int, java.lang.String)
	 * @see java.lang.StringBuffer#length()
	 */
	public AppendingStringBuffer insert(int offset, long l)
	{
		return insert(offset, String.valueOf(l));
	}

	/**
	 * Inserts the string representation of the <code>float</code> argument into this string
	 * buffer.
	 * <p>
	 * The second argument is converted to a string as if by the method <code>String.valueOf</code>,
	 * and the characters of that string are then inserted into this string buffer at the indicated
	 * offset.
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or
	 * equal to the length of this string buffer.
	 * 
	 * @param offset
	 *            the offset.
	 * @param f
	 *            a <code>float</code>.
	 * @return a reference to this <code>AppendingStringBuffer</code> object.
	 * @exception StringIndexOutOfBoundsException
	 *                if the offset is invalid.
	 * @see java.lang.String#valueOf(float)
	 * @see java.lang.StringBuffer#insert(int, java.lang.String)
	 * @see java.lang.StringBuffer#length()
	 */
	public AppendingStringBuffer insert(int offset, float f)
	{
		return insert(offset, String.valueOf(f));
	}

	/**
	 * Inserts the string representation of the <code>double</code> argument into this string
	 * buffer.
	 * <p>
	 * The second argument is converted to a string as if by the method <code>String.valueOf</code>,
	 * and the characters of that string are then inserted into this string buffer at the indicated
	 * offset.
	 * <p>
	 * The offset argument must be greater than or equal to <code>0</code>, and less than or