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 <FONT SIZE="-1">
 com.google.inject.assistedinject</FONT>
 <BR>
 Class Factories</H2>
 <PRE>
 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
   <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.google.inject.assistedinject.Factories</B>
 </PRE>
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 <DL>
 <DT><PRE>public final class <B>Factories</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
 </PRE>

 <P>
 Static utility methods for creating and working with factory interfaces.
 <P>

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 <CODE>static
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 <TD NOWRAP><FONT SIZE="-1">
 <CODE>&lt;F&gt; F</CODE></FONT></TD>
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 </CODE></FONT></TD>
 <TD><CODE><B><A HREF="../../../../com/google/inject/assistedinject/Factories.html#create(java.lang.Class, java.lang.Class)">create</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;F&gt;&nbsp;factoryInterface,
        <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&nbsp;constructedType)</CODE>

 <BR>
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns a factory that combines caller-provided parameters with injector-provided values when
  constructing objects.</TD>
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 <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
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 <A NAME="create(java.lang.Class, java.lang.Class)"><!-- --></A><H3>
 create</H3>
 <PRE>
 public static &lt;F&gt; F <B>create</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;F&gt;&nbsp;factoryInterface,
                            <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&nbsp;constructedType)</PRE>
 <DL>
 <DD>Returns a factory that combines caller-provided parameters with injector-provided values when
  constructing objects.

  <h3>Defining a Factory</h3>
  <code>factoryInterface</code> is an interface whose methods return the constructed type, or its
  supertypes. The method's parameters are the arguments required to build the constructed type.

  <pre>
  public interface PaymentFactory {
    Payment create(Date startDate, Money amount);
  } </pre>

  You can name your factory methods whatever you like, such as <i>create</i>,
  <i>createPayment</i> or <i>newPayment</i>.  You may include multiple factory methods in the
  same interface but they must all construct the same type.

  <h3>Creating a type that accepts factory parameters</h3>
  <code>constructedType</code> is a concrete class with an @<A HREF="../../../../com/google/inject/Inject.html" title="annotation in com.google.inject"><CODE>Inject</CODE></A>-annotated
  constructor. In addition to injector-provided parameters, the constructor should have
  parameters that match each of the factory method's parameters. Each factory-provided parameter
  requires an @<A HREF="../../../../com/google/inject/assistedinject/Assisted.html" title="annotation in com.google.inject.assistedinject"><CODE>Assisted</CODE></A> annotation. This serves to document that the parameter
  is not bound in the injector.

  <pre>
  public class RealPayment implements Payment {
    @Inject
    public RealPayment(
       CreditService creditService,
       AuthService authService,
       <strong>@Assisted Date startDate</strong>,
       <strong>@Assisted Money amount</strong>) {
      ...
    }
  }</pre>

  <h3>Configuring factories</h3>
  In your <A HREF="../../../../com/google/inject/Module.html" title="interface in com.google.inject"><CODE>module</CODE></A>, bind the factory interface to the returned
  factory:

  <pre>
  bind(PaymentFactory.class).toInstance(
      Factories.create(PaymentFactory.class, RealPayment.class));</pre>
  As a side-effect of this binding, Guice will inject the factory to initialize it for use. The
  factory cannot be used until it has been initialized.

  <h3>Using the Factory</h3>
  Inject your factory into your application classes. When you use the factory, your arguments
  will be combined with values from the injector to produce a concrete instance.

  <pre>
  public class PaymentAction {
    @Inject private PaymentFactory paymentFactory;

    public void doPayment(Money amount) {
      Payment payment = paymentFactory.create(new Date(), amount);
      payment.apply();
    }
  }</pre>

  <h3>Making Parameter Types Distinct</h3>
  The types of the factory method's parameters must be distinct. To use multiple parameters of
  the same type, use a named @<A HREF="../../../../com/google/inject/assistedinject/Assisted.html" title="annotation in com.google.inject.assistedinject"><CODE>Assisted</CODE></A> annotation to disambiguate the
  parameters. The names must be applied to the factory method's parameters:

  <pre>
  public interface PaymentFactory {
    Payment create(
        <strong>@Assisted("startDate")</strong> Date startDate,
        <strong>@Assisted("dueDate")</strong> Date dueDate,
        Money amount);
  } </pre>
  ...and to the concrete type's constructor parameters:
  <pre>
  public class RealPayment implements Payment {
    @Inject
    public RealPayment(
       CreditService creditService,
       AuthService authService,
       <strong>@Assisted("startDate")</strong> Date startDate,
       <strong>@Assisted("dueDate")</strong> Date dueDate,
       <strong>@Assisted</strong> Money amount) {
      ...
    }
  }</pre>

  <h3>MethodInterceptor support</h3>
  Returned factories delegate to the injector to construct returned values. The values are
  eligible for method interception.
 <P>
 <DD><DL>
 <DT><B>Parameters:</B><DD><CODE>factoryInterface</CODE> - a Java interface that defines one or more create methods.<DD><CODE>constructedType</CODE> - a concrete type that is assignable to the return types of all factory
      methods.</DL>
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	com.google.inject.assistedinject</FONT>
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	Class Factories</H2>
	<PRE>
	<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
	<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.google.inject.assistedinject.Factories</B>
	</PRE>
	<HR>
	<DL>
	<DT><PRE>public final class <B>Factories</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
	</PRE>

	<P>
	Static utility methods for creating and working with factory interfaces.
	<P>

	<P>
	<HR>

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	<TD><CODE><B><A HREF="../../../../com/google/inject/assistedinject/Factories.html#create(java.lang.Class, java.lang.Class)">create</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><F> factoryInterface,
	<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><?> constructedType)</CODE>

	<BR>
	Returns a factory that combines caller-provided parameters with injector-provided values when
	constructing objects.</TD>
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	<A NAME="create(java.lang.Class, java.lang.Class)"><!-- --></A><H3>
	create</H3>
	<PRE>
	public static <F> F <B>create</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><F> factoryInterface,
	<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><?> constructedType)</PRE>
	<DL>
	<DD>Returns a factory that combines caller-provided parameters with injector-provided values when
	constructing objects.

	<h3>Defining a Factory</h3>
	<code>factoryInterface</code> is an interface whose methods return the constructed type, or its
	supertypes. The method's parameters are the arguments required to build the constructed type.

	<pre>
	public interface PaymentFactory {
	Payment create(Date startDate, Money amount);
	} </pre>

	You can name your factory methods whatever you like, such as <i>create</i>,
	<i>createPayment</i> or <i>newPayment</i>. You may include multiple factory methods in the
	same interface but they must all construct the same type.

	<h3>Creating a type that accepts factory parameters</h3>
	<code>constructedType</code> is a concrete class with an @<A HREF="../../../../com/google/inject/Inject.html" title="annotation in com.google.inject"><CODE>Inject</CODE></A>-annotated
	constructor. In addition to injector-provided parameters, the constructor should have
	parameters that match each of the factory method's parameters. Each factory-provided parameter
	requires an @<A HREF="../../../../com/google/inject/assistedinject/Assisted.html" title="annotation in com.google.inject.assistedinject"><CODE>Assisted</CODE></A> annotation. This serves to document that the parameter
	is not bound in the injector.

	<pre>
	public class RealPayment implements Payment {
	@Inject
	public RealPayment(
	CreditService creditService,
	AuthService authService,
	<strong>@Assisted Date startDate</strong>,
	<strong>@Assisted Money amount</strong>) {
	...
	}
	}</pre>

	<h3>Configuring factories</h3>
	In your <A HREF="../../../../com/google/inject/Module.html" title="interface in com.google.inject"><CODE>module</CODE></A>, bind the factory interface to the returned
	factory:

	<pre>
	bind(PaymentFactory.class).toInstance(
	Factories.create(PaymentFactory.class, RealPayment.class));</pre>
	As a side-effect of this binding, Guice will inject the factory to initialize it for use. The
	factory cannot be used until it has been initialized.

	<h3>Using the Factory</h3>
	Inject your factory into your application classes. When you use the factory, your arguments
	will be combined with values from the injector to produce a concrete instance.

	<pre>
	public class PaymentAction {
	@Inject private PaymentFactory paymentFactory;

	public void doPayment(Money amount) {
	Payment payment = paymentFactory.create(new Date(), amount);
	payment.apply();
	}
	}</pre>

	<h3>Making Parameter Types Distinct</h3>
	The types of the factory method's parameters must be distinct. To use multiple parameters of
	the same type, use a named @<A HREF="../../../../com/google/inject/assistedinject/Assisted.html" title="annotation in com.google.inject.assistedinject"><CODE>Assisted</CODE></A> annotation to disambiguate the
	parameters. The names must be applied to the factory method's parameters:

	<pre>
	public interface PaymentFactory {
	Payment create(
	<strong>@Assisted("startDate")</strong> Date startDate,
	<strong>@Assisted("dueDate")</strong> Date dueDate,
	Money amount);
	} </pre>
	...and to the concrete type's constructor parameters:
	<pre>
	public class RealPayment implements Payment {
	@Inject
	public RealPayment(
	CreditService creditService,
	AuthService authService,
	<strong>@Assisted("startDate")</strong> Date startDate,
	<strong>@Assisted("dueDate")</strong> Date dueDate,
	<strong>@Assisted</strong> Money amount) {
	...
	}
	}</pre>

	<h3>MethodInterceptor support</h3>
	Returned factories delegate to the injector to construct returned values. The values are
	eligible for method interception.
	<P>
	<DD><DL>
	<DT><B>Parameters:</B><DD><CODE>factoryInterface</CODE> - a Java interface that defines one or more create methods.<DD><CODE>constructedType</CODE> - a concrete type that is assignable to the return types of all factory
	methods.</DL>
	</DD>
	</DL>
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