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    1   /*
    2    * $Id: MetaBeanProperty.java,v 1.3 2005/01/10 21:22:12 glaforge Exp $
    3    *
    4    * Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
    5    *
    6    * Redistribution and use of this software and associated documentation
    7    * ("Software"), with or without modification, are permitted provided that the
    8    * following conditions are met:
    9    *  1. Redistributions of source code must retain copyright statements and
    10   * notices. Redistributions must also contain a copy of this document.
    11   *  2. Redistributions in binary form must reproduce the above copyright
    12   * notice, this list of conditions and the following disclaimer in the
    13   * documentation and/or other materials provided with the distribution.
    14   *  3. The name "groovy" must not be used to endorse or promote products
    15   * derived from this Software without prior written permission of The Codehaus.
    16   * For written permission, please contact info@codehaus.org.
    17   *  4. Products derived from this Software may not be called "groovy" nor may
    18   * "groovy" appear in their names without prior written permission of The
    19   * Codehaus. "groovy" is a registered trademark of The Codehaus.
    20   *  5. Due credit should be given to The Codehaus - http://groovy.codehaus.org/
    21   *
    22   * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
    23   * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    24   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    25   * DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
    26   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    27   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    28   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    29   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    30   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    31   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
    32   * DAMAGE.
    33   *
    34   */
    35  package groovy.lang;
    36
    37  /***
    38   * Represents a property on a bean which may have a getter and/or a setter
    39   *
    40   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
    41   * @author Kim Pilho
    42   * @version $Revision: 1.3 $
    43   */
    44  public class MetaBeanProperty extends MetaProperty {
    45
    46      private MetaMethod getter;
    47      private MetaMethod setter;
    48
    49      public MetaBeanProperty(String name, Class type, MetaMethod getter, MetaMethod setter) {
    50  		super(name, type);
    51          this.getter = getter;
    52          this.setter = setter;
    53      }
    54
    55      /***
    56       * @return the property of the given object
    57       * @throws Exception if the property could not be evaluated
    58       */
    59      public Object getProperty(Object object) throws Exception {
    60  		if (getter == null) {
    61  			//@todo we probably need a WriteOnlyException class
    62  			throw new GroovyRuntimeException("Cannot read write-only property: " + name);
    63  		}
    64          return getter.invoke(object, MetaClass.EMPTY_ARRAY);
    65      }
    66
    67      /***
    68       * Sets the property on the given object to the new value
    69       *
    70       * @param object on which to set the property
    71       * @param newValue the new value of the property
    72       * @throws Exception if the property could not be set
    73       */
    74      public void setProperty(Object object, Object newValue) {
    75  		if(setter == null) {
    76  			throw new GroovyRuntimeException("Cannot set read-only property: " + name);
    77  		}
    78
    79  		try {
    80  			// we'll convert a GString to String if needed
    81  			if(getType() == String.class && !(newValue instanceof String))
    82  				newValue = newValue.toString();
    83
    84  			// Set property for primitive types
    85  			if (newValue instanceof java.math.BigDecimal) {
    86  				if (getType() == Double.class)
    87  					newValue = new Double(((java.math.BigDecimal) newValue).doubleValue());
    88  				else if (getType() == Float.class)
    89  					newValue = new Float(((java.math.BigDecimal) newValue).floatValue());
    90  				else if (getType() == Long.class)
    91  					newValue = new Long(((java.math.BigDecimal) newValue).longValue());
    92  				else if (getType() == Integer.class)
    93  					newValue = new Integer(((java.math.BigDecimal) newValue).intValue());
    94  				else if (getType() == Short.class)
    95  					newValue = new Short((short) ((java.math.BigDecimal) newValue).intValue());
    96  				else if (getType() == Byte.class)
    97  					newValue = new Byte((byte) ((java.math.BigDecimal) newValue).intValue());
    98  				else if (getType() == Character.class)
    99  					newValue = new Character((char) ((java.math.BigDecimal) newValue).intValue());
    100 			}
    101 			else if (newValue instanceof java.math.BigInteger) {
    102 				if (getType() == Long.class)
    103 					newValue = new Long(((java.math.BigInteger) newValue).longValue());
    104 				else if (getType() == Integer.class)
    105 					newValue = new Integer(((java.math.BigInteger) newValue).intValue());
    106 				else if (getType() == Short.class)
    107 					newValue = new Short((short) ((java.math.BigInteger) newValue).intValue());
    108 				else if (getType() == Byte.class)
    109 					newValue = new Byte((byte) ((java.math.BigInteger) newValue).intValue());
    110 				else if (getType() == Character.class)
    111 					newValue = new Character((char) ((java.math.BigInteger) newValue).intValue());
    112 			}
    113 			else if (newValue instanceof java.lang.Long) {
    114 				if (getType() == Integer.class)
    115 					newValue = new Integer(((Long) newValue).intValue());
    116 				else if (getType() == Short.class)
    117 					newValue = new  Short(((Long) newValue).shortValue());
    118 				else if (getType() == Byte.class)
    119 					newValue = new Byte(((Long) newValue).byteValue());
    120 				else if (getType() == Character.class)
    121 					newValue = new Character((char) ((Long) newValue).intValue());
    122 			}
    123 			else if (newValue instanceof java.lang.Integer) {
    124 				if (getType() == Short.class)
    125 					newValue = new  Short(((Integer) newValue).shortValue());
    126 				else if (getType() == Byte.class)
    127 					newValue = new Byte(((Integer) newValue).byteValue());
    128 				else if (getType() == Character.class)
    129 					newValue = new Character((char) ((Integer) newValue).intValue());
    130 			}
    131
    132 			setter.invoke(object, new Object[] { newValue });
    133 		}
    134 		catch(Exception e) {
    135 			throw new GroovyRuntimeException("Cannot set property: " + name +
    136 				" reason: " + e.getMessage(), e);
    137 		}
    138     }
    139
    140     public MetaMethod getGetter() {
    141         return getter;
    142     }
    143
    144     public MetaMethod getSetter() {
    145         return setter;
    146     }
    147
    148 	/***
    149 	 * this is for MetaClass to patch up the object later when looking for get*() methods
    150 	 */
    151 	void setGetter(MetaMethod getter) {
    152 		this.getter = getter;
    153 	}
    154
    155 	/***
    156 	 * this is for MetaClass to patch up the object later when looking for set*() methods
    157 	 */
    158 	void setSetter(MetaMethod setter) {
    159 		this.setter = setter;
    160 	}
    161 }