propertyvalue.java

EasyDBO是一个超轻量级对象-关系映射（Object/Relation Mapping

/*
 * Copyright 2002-2006 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.easyjf.beans;

import java.io.Serializable;

import com.easyjf.util.Assert;
import com.easyjf.util.ObjectUtils;


public class PropertyValue implements Serializable {

	private final String name;

	private final Object value;

	/**
	 * Create a new PropertyValue instance.
	 * @param name name of the property
	 * @param value value of the property (possibly before type conversion)
	 */
	public PropertyValue(String name, Object value) {
		if (name == null) {
			throw new IllegalArgumentException("Property name cannot be null");
		}
		this.name = name;
		this.value = value;
	}

	/**
	 * Copy constructor.
	 * @param source the PropertyValue to copy
	 */
	public PropertyValue(PropertyValue source) {
		Assert.notNull(source, "Source must not be null");
		this.name = source.getName();
		this.value = source.getValue();		
	}


	/**
	 * Return the name of the property.
	 */
	public String getName() {
		return name;
	}

	/**
	 * Return the value of the property.
	 * <p>Note that type conversion will <i>not</i> have occurred here.
	 * It is the responsibility of the BeanWrapper implementation to
	 * perform type conversion.
	 */
	public Object getValue() {
		return value;
	}


	public boolean equals(Object other) {
		if (this == other) {
			return true;
		}
		if (!(other instanceof PropertyValue)) {
			return false;
		}
		PropertyValue otherPv = (PropertyValue) other;
		return (this.name.equals(otherPv.name) &&
				ObjectUtils.nullSafeEquals(this.value, otherPv.value));
	}

	public int hashCode() {
		return this.name.hashCode() * 29 + (this.value == null ? 0 : this.value.hashCode());
	}

	public String toString() {
		return "PropertyValue: name='" + this.name + "', value=[" + this.value + "]";
	}

}