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 <h2 title="Annotation Type OneToMany" class="title">Annotation Type OneToMany</h2>
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 <pre>@Target(value={METHOD,FIELD})
  @Retention(value=RUNTIME)
 public @interface <span class="memberNameLabel">OneToMany</span></pre>
 <div class="block">Specifies a many-valued association with one-to-many multiplicity.

  <p> If the collection is defined using generics to specify the
  element type, the associated target entity type need not be
  specified; otherwise the target entity class must be specified.
  If the relationship is bidirectional, the
  <code> mappedBy</code> element must be used to specify the relationship field or
  property of the entity that is the owner of the relationship.

  <p> The <code>OneToMany</code> annotation may be used within an embeddable class
  contained within an entity class to specify a relationship to a
  collection of entities. If the relationship is bidirectional, the
  <code> mappedBy</code> element must be used to specify the relationship field or
  property of the entity that is the owner of the relationship.

  When the collection is a <code>java.util.Map</code>, the <code>cascade</code>
  element and the <code>orphanRemoval</code> element apply to the map value.

  <pre>

     Example 1: One-to-Many association using generics

     // In Customer class:

     &#064;OneToMany(cascade=ALL, mappedBy="customer")
     public Set&#060;Order&#062; getOrders() { return orders; }

     In Order class:

     &#064;ManyToOne
     &#064;JoinColumn(name="CUST_ID", nullable=false)
     public Customer getCustomer() { return customer; }


     Example 2: One-to-Many association without using generics

     // In Customer class:

     &#064;OneToMany(targetEntity=com.acme.Order.class, cascade=ALL,
                 mappedBy="customer")
     public Set getOrders() { return orders; }

     // In Order class:

     &#064;ManyToOne
     &#064;JoinColumn(name="CUST_ID", nullable=false)
     public Customer getCustomer() { return customer; }


     Example 3: Unidirectional One-to-Many association using a foreign key mapping

     // In Customer class:

     &#064;OneToMany(orphanRemoval=true)
     &#064;JoinColumn(name="CUST_ID") // join column is in table for Order
     public Set&#060;Order&#062; getOrders() {return orders;}

  </pre></div>
 <dl>
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 <dd>Java Persistence 1.0</dd>
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 <h3>Optional Element Summary</h3>
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 <caption><span>Optional Elements</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Optional Element and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code><a href="../../javax/persistence/CascadeType.html" title="enum in javax.persistence">CascadeType</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#cascade--">cascade</a></span></code>
 <div class="block">(Optional) The operations that must be cascaded to
  the target of the association.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code><a href="../../javax/persistence/FetchType.html" title="enum in javax.persistence">FetchType</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#fetch--">fetch</a></span></code>
 <div class="block">(Optional) Whether the association should be lazily loaded or
  must be eagerly fetched.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>java.lang.String</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#mappedBy--">mappedBy</a></span></code>
 <div class="block">The field that owns the relationship.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#orphanRemoval--">orphanRemoval</a></span></code>
 <div class="block">(Optional) Whether to apply the remove operation to entities that have
  been removed from the relationship and to cascade the remove operation to
  those entities.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>java.lang.Class</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#targetEntity--">targetEntity</a></span></code>
 <div class="block">(Optional) The entity class that is the target
  of the association.</div>
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 <pre>public abstract&nbsp;java.lang.Class&nbsp;targetEntity</pre>
 <div class="block">(Optional) The entity class that is the target
  of the association. Optional only if the collection
  property is defined using Java generics.
  Must be specified otherwise.

  <p> Defaults to the parameterized type of
  the collection when defined using generics.</div>
 <dl>
 <dt>Default:</dt>
 <dd>void.class</dd>
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 <h4>cascade</h4>
 <pre>public abstract&nbsp;<a href="../../javax/persistence/CascadeType.html" title="enum in javax.persistence">CascadeType</a>[]&nbsp;cascade</pre>
 <div class="block">(Optional) The operations that must be cascaded to
  the target of the association.
  <p> Defaults to no operations being cascaded.

  <p> When the target collection is a <code>java.util.Map</code>, the <code>cascade</code> element applies to the
  map value.</div>
 <dl>
 <dt>Default:</dt>
 <dd>{}</dd>
 </dl>
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 <h4>fetch</h4>
 <pre>public abstract&nbsp;<a href="../../javax/persistence/FetchType.html" title="enum in javax.persistence">FetchType</a>&nbsp;fetch</pre>
 <div class="block">(Optional) Whether the association should be lazily loaded or
  must be eagerly fetched. The EAGER strategy is a requirement on
  the persistence provider runtime that the associated entities
  must be eagerly fetched.  The LAZY strategy is a hint to the
  persistence provider runtime.</div>
 <dl>
 <dt>Default:</dt>
 <dd>javax.persistence.FetchType.LAZY</dd>
 </dl>
 </li>
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 <pre>public abstract&nbsp;java.lang.String&nbsp;mappedBy</pre>
 <div class="block">The field that owns the relationship. Required unless
  the relationship is unidirectional.</div>
 <dl>
 <dt>Default:</dt>
 <dd>""</dd>
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 <pre>public abstract&nbsp;boolean&nbsp;orphanRemoval</pre>
 <div class="block">(Optional) Whether to apply the remove operation to entities that have
  been removed from the relationship and to cascade the remove operation to
  those entities.</div>
 <dl>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>Java Persistence 2.0</dd>
 </dl>
 <dl>
 <dt>Default:</dt>
 <dd>false</dd>
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	<div class="subTitle">javax.persistence</div>
	<h2 title="Annotation Type OneToMany" class="title">Annotation Type OneToMany</h2>
	</div>
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	<pre>@Target(value={METHOD,FIELD})
	@Retention(value=RUNTIME)
	public @interface <span class="memberNameLabel">OneToMany</span></pre>
	<div class="block">Specifies a many-valued association with one-to-many multiplicity.

	<p> If the collection is defined using generics to specify the
	element type, the associated target entity type need not be
	specified; otherwise the target entity class must be specified.
	If the relationship is bidirectional, the
	<code> mappedBy</code> element must be used to specify the relationship field or
	property of the entity that is the owner of the relationship.

	<p> The <code>OneToMany</code> annotation may be used within an embeddable class
	contained within an entity class to specify a relationship to a
	collection of entities. If the relationship is bidirectional, the
	<code> mappedBy</code> element must be used to specify the relationship field or
	property of the entity that is the owner of the relationship.

	When the collection is a <code>java.util.Map</code>, the <code>cascade</code>
	element and the <code>orphanRemoval</code> element apply to the map value.

	<pre>

	Example 1: One-to-Many association using generics

	// In Customer class:

	@OneToMany(cascade=ALL, mappedBy="customer")
	public Set<Order> getOrders() { return orders; }

	In Order class:

	@ManyToOne
	@JoinColumn(name="CUST_ID", nullable=false)
	public Customer getCustomer() { return customer; }


	Example 2: One-to-Many association without using generics

	// In Customer class:

	@OneToMany(targetEntity=com.acme.Order.class, cascade=ALL,
	mappedBy="customer")
	public Set getOrders() { return orders; }

	// In Order class:

	@ManyToOne
	@JoinColumn(name="CUST_ID", nullable=false)
	public Customer getCustomer() { return customer; }


	Example 3: Unidirectional One-to-Many association using a foreign key mapping

	// In Customer class:

	@OneToMany(orphanRemoval=true)
	@JoinColumn(name="CUST_ID") // join column is in table for Order
	public Set<Order> getOrders() {return orders;}

	</pre></div>
	<dl>
	<dt><span class="simpleTagLabel">Since:</span></dt>
	<dd>Java Persistence 1.0</dd>
	</dl>
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	<h3>Optional Element Summary</h3>
	<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Optional Element Summary table, listing optional elements, and an explanation">
	<caption><span>Optional Elements</span><span class="tabEnd"> </span></caption>
	<tr>
	<th class="colFirst" scope="col">Modifier and Type</th>
	<th class="colLast" scope="col">Optional Element and Description</th>
	</tr>
	<tr class="altColor">
	<td class="colFirst"><code><a href="../../javax/persistence/CascadeType.html" title="enum in javax.persistence">CascadeType</a>[]</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#cascade--">cascade</a></span></code>
	<div class="block">(Optional) The operations that must be cascaded to
	the target of the association.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<td class="colFirst"><code><a href="../../javax/persistence/FetchType.html" title="enum in javax.persistence">FetchType</a></code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#fetch--">fetch</a></span></code>
	<div class="block">(Optional) Whether the association should be lazily loaded or
	must be eagerly fetched.</div>
	</td>
	</tr>
	<tr class="altColor">
	<td class="colFirst"><code>java.lang.String</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#mappedBy--">mappedBy</a></span></code>
	<div class="block">The field that owns the relationship.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<td class="colFirst"><code>boolean</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#orphanRemoval--">orphanRemoval</a></span></code>
	<div class="block">(Optional) Whether to apply the remove operation to entities that have
	been removed from the relationship and to cascade the remove operation to
	those entities.</div>
	</td>
	</tr>
	<tr class="altColor">
	<td class="colFirst"><code>java.lang.Class</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/OneToMany.html#targetEntity--">targetEntity</a></span></code>
	<div class="block">(Optional) The entity class that is the target
	of the association.</div>
	</td>
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	<pre>public abstract java.lang.Class targetEntity</pre>
	<div class="block">(Optional) The entity class that is the target
	of the association. Optional only if the collection
	property is defined using Java generics.
	Must be specified otherwise.

	<p> Defaults to the parameterized type of
	the collection when defined using generics.</div>
	<dl>
	<dt>Default:</dt>
	<dd>void.class</dd>
	</dl>
	</li>
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	<h4>cascade</h4>
	<pre>public abstract <a href="../../javax/persistence/CascadeType.html" title="enum in javax.persistence">CascadeType</a>[] cascade</pre>
	<div class="block">(Optional) The operations that must be cascaded to
	the target of the association.
	<p> Defaults to no operations being cascaded.

	<p> When the target collection is a <code>java.util.Map</code>, the <code>cascade</code> element applies to the
	map value.</div>
	<dl>
	<dt>Default:</dt>
	<dd>{}</dd>
	</dl>
	</li>
	</ul>
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	<h4>fetch</h4>
	<pre>public abstract <a href="../../javax/persistence/FetchType.html" title="enum in javax.persistence">FetchType</a> fetch</pre>
	<div class="block">(Optional) Whether the association should be lazily loaded or
	must be eagerly fetched. The EAGER strategy is a requirement on
	the persistence provider runtime that the associated entities
	must be eagerly fetched. The LAZY strategy is a hint to the
	persistence provider runtime.</div>
	<dl>
	<dt>Default:</dt>
	<dd>javax.persistence.FetchType.LAZY</dd>
	</dl>
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	<h4>mappedBy</h4>
	<pre>public abstract java.lang.String mappedBy</pre>
	<div class="block">The field that owns the relationship. Required unless
	the relationship is unidirectional.</div>
	<dl>
	<dt>Default:</dt>
	<dd>""</dd>
	</dl>
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	<h4>orphanRemoval</h4>
	<pre>public abstract boolean orphanRemoval</pre>
	<div class="block">(Optional) Whether to apply the remove operation to entities that have
	been removed from the relationship and to cascade the remove operation to
	those entities.</div>
	<dl>
	<dt><span class="simpleTagLabel">Since:</span></dt>
	<dd>Java Persistence 2.0</dd>
	</dl>
	<dl>
	<dt>Default:</dt>
	<dd>false</dd>
	</dl>
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