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/*
 *  Copyright 2001-present Stephen Colebourne
 *
 *  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 org.joda.beans.impl;

import org.joda.beans.Bean;
import org.joda.beans.MetaProperty;
import org.joda.beans.Property;

/**
 * A property that binds a {@code Bean} to a {@code MetaProperty}.
 * 

* This is the standard implementation of a property. * It defers the strategy of getting and setting the value to the meta-property. *

* This implementation is also a map entry to aid performance in maps. * * @param

the type of the property content */ public final class BasicProperty

implements Property

{ /** The bean that the property is bound to. */ private final Bean bean; /** The meta-property that the property is bound to. */ private final MetaProperty

metaProperty; /** * Factory to create a property avoiding duplicate generics. * * @param

the property type * @param bean the bean that the property is bound to, not null * @param metaProperty the meta property, not null * @return the property, not null */ public static

BasicProperty

of(Bean bean, MetaProperty

metaProperty) { return new BasicProperty<>(bean, metaProperty); } /** * Creates a property binding the bean to the meta-property. * * @param bean the bean that the property is bound to, not null * @param metaProperty the meta property, not null */ private BasicProperty(Bean bean, MetaProperty

metaProperty) { if (bean == null) { throw new NullPointerException("Bean must not be null"); } if (metaProperty == null) { throw new NullPointerException("MetaProperty must not be null"); } this.bean = bean; this.metaProperty = metaProperty; } //----------------------------------------------------------------------- @SuppressWarnings("unchecked") @Override public B bean() { return (B) bean; } @Override public MetaProperty

metaProperty() { return metaProperty; } //----------------------------------------------------------------------- @Override public boolean equals(Object obj) { if (obj == this) { return true; } if (obj instanceof Property) { Property other = (Property) obj; if (metaProperty.equals(other.metaProperty())) { Object a = get(); Object b = other.get(); return a == null ? b == null : a.equals(b); } } return false; } @Override public int hashCode() { P value = get(); return metaProperty.hashCode() ^ (value == null ? 0 : value.hashCode()); } /** * Returns a string that summarises the property. * * @return a summary string, not null */ @Override public String toString() { return metaProperty + "=" + get(); } }





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