parameterblock.java

java1.6众多例子参考

    /** 
     * Adds a Long to the list of parameters. 
     * @param l the long to add to the 
     *            <code>parameters</code> <code>Vector</code>
     * @return a new <code>ParameterBlock</code> containing 
     *         the specified parameter.
     */
    public ParameterBlock add(long l) {
        return add(new Long(l));
    }

    /** 
     * Adds a Float to the list of parameters. 
     * @param f the float to add to the 
     *            <code>parameters</code> <code>Vector</code>
     * @return a new <code>ParameterBlock</code> containing 
     *         the specified parameter.
     */
    public ParameterBlock add(float f) {
        return add(new Float(f));
    }

    /** 
     * Adds a Double to the list of parameters. 
     * @param d the double to add to the 
     *            <code>parameters</code> <code>Vector</code>
     * @return a new <code>ParameterBlock</code> containing 
     *         the specified parameter.
     */
    public ParameterBlock add(double d) {
        return add(new Double(d));
    }

    /**
     * Replaces an Object in the list of parameters.
     * If the index lies beyond the current source list,
     * the list is extended with nulls as needed.
     * @param obj the parameter that replaces the 
     *        parameter at the specified index in the
     *        <code>parameters</code> <code>Vector</code>
     * @param index the index of the parameter to be 
     *        replaced with the specified parameter
     * @return a new <code>ParameterBlock</code> containing
     *        the specified parameter.
     */
    public ParameterBlock set(Object obj, int index) {
        int oldSize = parameters.size();
        int newSize = index + 1;
        if (oldSize < newSize) {
            parameters.setSize(newSize);
        }
        parameters.setElementAt(obj, index);
        return this;
    }

    /**
     * Replaces an Object in the list of parameters with a Byte.
     * If the index lies beyond the current source list,
     * the list is extended with nulls as needed.
     * @param b the parameter that replaces the 
     *        parameter at the specified index in the
     *        <code>parameters</code> <code>Vector</code>
     * @param index the index of the parameter to be 
     *        replaced with the specified parameter
     * @return a new <code>ParameterBlock</code> containing
     *        the specified parameter.
     */
    public ParameterBlock set(byte b, int index) {
        return set(new Byte(b), index);
    }

    /**
     * Replaces an Object in the list of parameters with a Character.
     * If the index lies beyond the current source list,
     * the list is extended with nulls as needed.
     * @param c the parameter that replaces the 
     *        parameter at the specified index in the
     *        <code>parameters</code> <code>Vector</code>
     * @param index the index of the parameter to be 
     *        replaced with the specified parameter
     * @return a new <code>ParameterBlock</code> containing
     *        the specified parameter.
     */
    public ParameterBlock set(char c, int index) {
        return set(new Character(c), index);
    }

    /**
     * Replaces an Object in the list of parameters with a Short.
     * If the index lies beyond the current source list,
     * the list is extended with nulls as needed.
     * @param s the parameter that replaces the 
     *        parameter at the specified index in the
     *        <code>parameters</code> <code>Vector</code>
     * @param index the index of the parameter to be 
     *        replaced with the specified parameter
     * @return a new <code>ParameterBlock</code> containing
     *        the specified parameter.
     */
    public ParameterBlock set(short s, int index) {
        return set(new Short(s), index);
    }

    /**
     * Replaces an Object in the list of parameters with an Integer.
     * If the index lies beyond the current source list,
     * the list is extended with nulls as needed.
     * @param i the parameter that replaces the 
     *        parameter at the specified index in the
     *        <code>parameters</code> <code>Vector</code>
     * @param index the index of the parameter to be 
     *        replaced with the specified parameter
     * @return a new <code>ParameterBlock</code> containing
     *        the specified parameter.
     */
    public ParameterBlock set(int i, int index) {
        return set(new Integer(i), index);
    }

    /**
     * Replaces an Object in the list of parameters with a Long.
     * If the index lies beyond the current source list,
     * the list is extended with nulls as needed.
     * @param l the parameter that replaces the 
     *        parameter at the specified index in the
     *        <code>parameters</code> <code>Vector</code>
     * @param index the index of the parameter to be 
     *        replaced with the specified parameter
     * @return a new <code>ParameterBlock</code> containing
     *        the specified parameter.
     */
    public ParameterBlock set(long l, int index) {
        return set(new Long(l), index);
    }

    /**
     * Replaces an Object in the list of parameters with a Float.
     * If the index lies beyond the current source list,
     * the list is extended with nulls as needed.
     * @param f the parameter that replaces the 
     *        parameter at the specified index in the
     *        <code>parameters</code> <code>Vector</code>
     * @param index the index of the parameter to be 
     *        replaced with the specified parameter
     * @return a new <code>ParameterBlock</code> containing
     *        the specified parameter.
     */
    public ParameterBlock set(float f, int index) {
        return set(new Float(f), index);
    }

    /**
     * Replaces an Object in the list of parameters with a Double.
     * If the index lies beyond the current source list,
     * the list is extended with nulls as needed.
     * @param d the parameter that replaces the 
     *        parameter at the specified index in the
     *        <code>parameters</code> <code>Vector</code>
     * @param index the index of the parameter to be 
     *        replaced with the specified parameter
     * @return a new <code>ParameterBlock</code> containing
     *        the specified parameter.
     */
    public ParameterBlock set(double d, int index) {
        return set(new Double(d), index);
    }

    /**
     * Gets a parameter as an object.
     * @param index the index of the parameter to get
     * @return an <code>Object</code> representing the
     *         the parameter at the specified index
     *         into the <code>parameters</code>
     *         <code>Vector</code>.
     */
    public Object getObjectParameter(int index) {
        return parameters.elementAt(index);
    }

    /**
     * A convenience method to return a parameter as a byte.  An
     * exception is thrown if the parameter is 
     * <code>null</code> or not a <code>Byte</code>.
     *
     * @param index the index of the parameter to be returned.
     * @return the parameter at the specified index
     *         as a <code>byte</code> value.
     * @throws ClassCastException if the parameter at the
     *         specified index is not a <code>Byte</code>
     * @throws NullPointerException if the parameter at the specified
     *         index is <code>null</code>
     * @throws ArrayIndexOutOfBoundsException if <code>index</code>
     *         is negative or not less than the current size of this
     *         <code>ParameterBlock</code> object
     */
    public byte getByteParameter(int index) {
        return ((Byte)parameters.elementAt(index)).byteValue();
    }

    /**
     * A convenience method to return a parameter as a char.  An
     * exception is thrown if the parameter is 
     * <code>null</code> or not a <code>Character</code>.
     *
     * @param index the index of the parameter to be returned.
     * @return the parameter at the specified index       
     *         as a <code>char</code> value.
     * @throws ClassCastException if the parameter at the
     *         specified index is not a <code>Character</code>
     * @throws NullPointerException if the parameter at the specified
     *         index is <code>null</code>
     * @throws ArrayIndexOutOfBoundsException if <code>index</code>
     *         is negative or not less than the current size of this
     *         <code>ParameterBlock</code> object
     */
    public char getCharParameter(int index) {
        return ((Character)parameters.elementAt(index)).charValue();
    }
    
    /**
     * A convenience method to return a parameter as a short.  An
     * exception is thrown if the parameter is 
     * <code>null</code> or not a <code>Short</code>.
     *
     * @param index the index of the parameter to be returned.
     * @return the parameter at the specified index       
     *         as a <code>short</code> value.
     * @throws ClassCastException if the parameter at the
     *         specified index is not a <code>Short</code>
     * @throws NullPointerException if the parameter at the specified
     *         index is <code>null</code>
     * @throws ArrayIndexOutOfBoundsException if <code>index</code>
     *         is negative or not less than the current size of this
     *         <code>ParameterBlock</code> object
     */
    public short getShortParameter(int index) {
        return ((Short)parameters.elementAt(index)).shortValue();
    }

    /**
     * A convenience method to return a parameter as an int.  An
     * exception is thrown if the parameter is 
     * <code>null</code> or not an <code>Integer</code>.
     *
     * @param index the index of the parameter to be returned.
     * @return the parameter at the specified index       
     *         as a <code>int</code> value.
     * @throws ClassCastException if the parameter at the
     *         specified index is not a <code>Integer</code>
     * @throws NullPointerException if the parameter at the specified
     *         index is <code>null</code>
     * @throws ArrayIndexOutOfBoundsException if <code>index</code>
     *         is negative or not less than the current size of this
     *         <code>ParameterBlock</code> object
     */
    public int getIntParameter(int index) {
        return ((Integer)parameters.elementAt(index)).intValue();
    }

    /**
     * A convenience method to return a parameter as a long.  An
     * exception is thrown if the parameter is 
     * <code>null</code> or not a <code>Long</code>.
     *
     * @param index the index of the parameter to be returned.
     * @return the parameter at the specified index       
     *         as a <code>long</code> value.
     * @throws ClassCastException if the parameter at the
     *         specified index is not a <code>Long</code>
     * @throws NullPointerException if the parameter at the specified
     *         index is <code>null</code>
     * @throws ArrayIndexOutOfBoundsException if <code>index</code>
     *         is negative or not less than the current size of this
     *         <code>ParameterBlock</code> object
     */
    public long getLongParameter(int index) {
        return ((Long)parameters.elementAt(index)).longValue();
    }

    /**
     * A convenience method to return a parameter as a float.  An
     * exception is thrown if the parameter is 
     * <code>null</code> or not a <code>Float</code>.
     *
     * @param index the index of the parameter to be returned.
     * @return the parameter at the specified index       
     *         as a <code>float</code> value.
     * @throws ClassCastException if the parameter at the
     *         specified index is not a <code>Float</code>
     * @throws NullPointerException if the parameter at the specified
     *         index is <code>null</code>
     * @throws ArrayIndexOutOfBoundsException if <code>index</code>
     *         is negative or not less than the current size of this
     *         <code>ParameterBlock</code> object
     */
    public float getFloatParameter(int index) {
        return ((Float)parameters.elementAt(index)).floatValue();
    }

    /**
     * A convenience method to return a parameter as a double.  An
     * exception is thrown if the parameter is 
     * <code>null</code> or not a <code>Double</code>.
     *
     * @param index the index of the parameter to be returned.
     * @return the parameter at the specified index       
     *         as a <code>double</code> value.
     * @throws ClassCastException if the parameter at the
     *         specified index is not a <code>Double</code>
     * @throws NullPointerException if the parameter at the specified
     *         index is <code>null</code>
     * @throws ArrayIndexOutOfBoundsException if <code>index</code>
     *         is negative or not less than the current size of this
     *         <code>ParameterBlock</code> object
     */
    public double getDoubleParameter(int index) {
        return ((Double)parameters.elementAt(index)).doubleValue();
    }

    /**
     * Returns an array of Class objects describing the types
     * of the parameters.
     * @return an array of <code>Class</code> objects.
     */
    public Class [] getParamClasses() {
        int numParams = getNumParameters();
        Class [] classes = new Class[numParams];
        int i;

        for (i = 0; i < numParams; i++) {
            Object obj = getObjectParameter(i);
            if (obj instanceof Byte) {
              classes[i] = byte.class;
            } else if (obj instanceof Character) {
              classes[i] = char.class;
            } else if (obj instanceof Short) {
              classes[i] = short.class;
            } else if (obj instanceof Integer) {
              classes[i] = int.class;
            } else if (obj instanceof Long) {
              classes[i] = long.class;
            } else if (obj instanceof Float) {
              classes[i] = float.class;
            } else if (obj instanceof Double) {
              classes[i] = double.class;
            } else {
              classes[i] = obj.getClass();
            }
        }
        
        return classes;
    }
}