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77 lines
2.8 KiB
77 lines
2.8 KiB
7 years ago
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/*
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* Copyright (c) 2008, 2009, 2011 Oracle, Inc. All rights reserved.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
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* which accompanies this distribution. The Eclipse Public License is available
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* at http://www.eclipse.org/legal/epl-v10.html and the Eclipse Distribution License
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* is available at http://www.eclipse.org/org/documents/edl-v10.php.
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*/
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package com.fr.third.javax.persistence;
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import java.lang.annotation.Retention;
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import java.lang.annotation.Target;
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import static java.lang.annotation.ElementType.FIELD;
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import static java.lang.annotation.ElementType.METHOD;
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import static java.lang.annotation.RetentionPolicy.RUNTIME;
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import static com.fr.third.javax.persistence.FetchType.EAGER;
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/**
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* The simplest type of mapping to a database column. The
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* <code>Basic</code> annotation can be applied to a persistent
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* property or instance variable of any of the following types: Java
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* primitive types, wrappers of the primitive types, <code>String</code>,
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* <code>java.math.BigInteger</code>,
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* <code>java.math.BigDecimal</code>,
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* <code>java.util.Date</code>,
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* <code>java.util.Calendar</code>,
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* <code>java.sql.Date</code>,
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* <code>java.sql.Time</code>,
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* <code>java.sql.Timestamp</code>, <code>byte[]</code>, <code>Byte[]</code>,
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* <code>char[]</code>, <code>Character[]</code>, enums, and any other type that
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* implements <code>java.io.Serializable</code>.
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*
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* <p> The use of the <code>Basic</code> annotation is optional for
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* persistent fields and properties of these types. If the
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* <code>Basic</code> annotation is not specified for such a field or
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* property, the default values of the <code>Basic</code> annotation
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* will apply.
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*
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* <pre>
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* Example 1:
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*
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* @Basic
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* protected String name;
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*
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* Example 2:
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*
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* @Basic(fetch=LAZY)
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* protected String getName() { return name; }
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*
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* </pre>
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* @since Java Persistence 1.0
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*/
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@Target({METHOD, FIELD})
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@Retention(RUNTIME)
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public @interface Basic {
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/**
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* (Optional) Defines whether the value of the field or property should
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* be lazily loaded or must be eagerly fetched. The <code>EAGER</code>
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* strategy is a requirement on the persistence provider runtime
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* that the value must be eagerly fetched. The <code>LAZY</code>
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* strategy is a hint to the persistence provider runtime.
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* If not specified, defaults to <code>EAGER</code>.
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*/
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FetchType fetch() default EAGER;
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/**
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* (Optional) Defines whether the value of the field or property may be null.
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* This is a hint and is disregarded for primitive types; it may
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* be used in schema generation.
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* If not specified, defaults to <code>true</code>.
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*/
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boolean optional() default true;
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}
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