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| com.google.inject.multibindings Documentation Differences
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| <A NAME="com.google.inject.multibindings.MapBinder!class"></A><a href="com.google.inject.multibindings.MapBinder.html" class="hiddenlink">Class <b>MapBinder</b></a><br><br><blockquote>An API to bind multiple map entries separately, only to later inject them as |
| a complete map. MapBinder is intended for use in your application's module: |
| <pre><code> |
| public class SnacksModule extends AbstractModule { |
| protected void configure() { |
| MapBinder<String, Snack> mapbinder |
| = MapBinder.newMapBinder(binder(), String.class, Snack.class); |
| mapbinder.addBinding("twix").toInstance(new Twix()); |
| mapbinder.addBinding("snickers").toProvider(SnickersProvider.class); |
| mapbinder.addBinding("skittles").to(Skittles.class); |
| } |
| }</code></pre> |
| |
| <p>With this binding, a <A HREF="http://google-guice.googlecode.com/svn/trunk/latest-api-diffs/4.0/javadoc/com/google/inject/multibindings/MapBinder/Map.html"><TT>Map</TT></A>{@code <String, Snack>} can now be |
| injected: |
| <pre><code> |
| class SnackMachine { |
| {@literal @}Inject |
| public SnackMachine(Map<String, Snack> snacks) { ... } |
| }</code></pre> |
| |
| <p>In addition to binding {@code Map<K, V>}, a mapbinder will also bind |
| {@code Map<K, Provider<V>>} for lazy value provision: |
| <pre><code> |
| class SnackMachine { |
| {@literal @}Inject |
| public SnackMachine(Map<String, Provider<Snack>> snackProviders) { ... } |
| }</code></pre> |
| |
| <p>Contributing mapbindings from different modules is supported. For example, |
| it is okay to have both {@code CandyModule} and {@code ChipsModule} both |
| create their own {@code MapBinder<String, Snack>}, and to each contribute |
| bindings to the snacks map. When that map is injected, it will contain |
| entries from both modules. |
| |
| <p>The map's iteration order is consistent with the binding order. This is |
| convenient when multiple elements are contributed by the same module because |
| that module can order its bindings appropriately. Avoid relying on the |
| iteration order of elements contributed by different modules, since there is |
| no equivalent mechanism to order modules.<strike> |
| |
| </strike><span style="background: #FFFF00"> |
| |
| </span> <p>The map is unmodifiable. Elements can only be added to the map by |
| configuring the MapBinder. Elements can never be removed from the map. |
| |
| <p>Values are resolved at map injection time. If a value is bound to a |
| provider, that provider's get method will be called each time the map is |
| injected (unless the binding is also scoped, or a map of providers is injected). |
| |
| <p>Annotations are used to create different maps of the same key/value |
| type. Each distinct annotation gets its own independent map. |
| |
| <p><strong>Keys must be distinct.</strong> If the same key is bound more than |
| once, map injection will fail. However, use <A HREF="http://google-guice.googlecode.com/svn/trunk/latest-api-diffs/4.0/javadoc/com/google/inject/multibindings/MapBinder/.html#permitDuplicates()"><TT>.permitDuplicates()</TT></A> in |
| order to allow duplicate keys; extra bindings to {@code Map<K, Set<V>>} and |
| {@code Map<K, Set<Provider<V>>} will be added. |
| |
| <p><strong>Keys must be non-null.</strong> {@code addBinding(null)} will |
| throw an unchecked exception. |
| |
| <p><strong>Values must be non-null to use map injection.</strong> If any |
| value is null, map injection will fail (although injecting a map of providers |
| will not). |
| |
| @author dpb@google.com (David P. Baker)</blockquote>
|
| <hr align="left" width="100%">
|
| <A NAME="com.google.inject.multibindings.Multibinder!class"></A><a href="com.google.inject.multibindings.Multibinder.html" class="hiddenlink">Class <b>Multibinder</b></a><br><br><blockquote>An API to bind multiple values separately, only to later inject them as a |
| complete collection. Multibinder is intended for use in your application's |
| module: |
| <pre><code> |
| public class SnacksModule extends AbstractModule { |
| protected void configure() { |
| Multibinder<Snack> multibinder |
| = Multibinder.newSetBinder(binder(), Snack.class); |
| multibinder.addBinding().toInstance(new Twix()); |
| multibinder.addBinding().toProvider(SnickersProvider.class); |
| multibinder.addBinding().to(Skittles.class); |
| } |
| }</code></pre> |
| |
| <p>With this binding, a <A HREF="http://google-guice.googlecode.com/svn/trunk/latest-api-diffs/4.0/javadoc/com/google/inject/multibindings/Multibinder/Set.html"><TT>Set</TT></A>{@code <Snack>} can now be injected: |
| <pre><code> |
| class SnackMachine { |
| {@literal @}Inject |
| public SnackMachine(Set<Snack> snacks) { ... } |
| }</code></pre> |
| |
| <p>Contributing multibindings from different modules is supported. For |
| example, it is okay <strike>to have</strike><span style="background: #FFFF00">for</span> both {@code CandyModule} and {@code ChipsModule} |
| to <strike>both </strike>create their own {@code Multibinder<Snack>}, and to each contribute |
| bindings to the set of snacks. When that set is injected, it will contain |
| elements from both modules. |
| |
| <p>The set's iteration order is consistent with the binding order. This is |
| convenient when multiple elements are contributed by the same module because |
| that module can order its bindings appropriately. Avoid relying on the |
| iteration order of elements contributed by different modules, since there is |
| no equivalent mechanism to order modules. |
| |
| <p>The set is unmodifiable. Elements can only be added to the set by |
| configuring the multibinder. Elements can never be removed from the set. |
| |
| <p>Elements are resolved at set injection time. If an element is bound to a |
| provider, that provider's get method will be called each time the set is |
| injected (unless the binding is also scoped). |
| |
| <p>Annotations are be used to create different sets of the same element |
| type. Each distinct annotation gets its own independent collection of |
| elements. |
| |
| <p><strong>Elements must be distinct.</strong> If multiple bound elements |
| have the same value, set injection will fail. |
| |
| <p><strong>Elements must be non-null.</strong> If any set element is null, |
| set injection will fail. |
| |
| @author jessewilson@google.com (Jesse Wilson)</blockquote>
|
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