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POhow to have guice use my factory for creating new instances
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  1. POhow to have guice use my factory for creating new instances
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    copied!<p>I am trying to have guice call my factory method to create the instance and then fill it in from inspecting it's annotations. I know I have done this before but I can't figure out how to bind the following code....</p> <p>My bind code</p> <pre><code>binder.bind(ProcessorFactory.class).asEagerSingleton(); </code></pre> <p>The code I am binding (and I want Guice to fill in SplineProcessor and InvertProcessor with their bindings on creation.</p> <pre><code>public class ProcessorFactory implements Provider&lt;Processor&gt;{ public static final ThreadLocal&lt;String&gt; threadLocal = new ThreadLocal&lt;String&gt;(); private Map&lt;String, Class&lt;?&gt;&gt; nameToClazz = new HashMap&lt;String, Class&lt;?&gt;&gt;(); public ProcessorFactory() { nameToClazz.put("splineV1Beta", SplineProcessor.class); nameToClazz.put("invertV1Beta", InvertProcessor.class); } @Override public Processor get() { String moduleName = threadLocal.get(); if(moduleName == null) throw new IllegalArgumentException("Please call ProcessorFactory.threadLocal.set(moduleName)"); Class&lt;?&gt; clazz = nameToClazz.get(moduleName); if(clazz == null) return null; try { Object newInstance = clazz.newInstance(); return (Processor) newInstance; } catch (InstantiationException e) { throw new RuntimeException(e); } catch (IllegalAccessException e) { throw new RuntimeException(e); } finally { threadLocal.set(null); } } } </code></pre> <p>NOTE: I would STILL like to know how to do this though I also have this open question which is an even better way of doing the same thing <a href="https://stackoverflow.com/questions/14833777/guice-multibinder-with-providers">guice multibinder with Providers</a></p> <p>but unfortunately, I can't get that to work either.</p> <p>NOTE: What inject code do I use as well. I am using the following code to inject(and tried ProcessorFactory as well).</p> <pre><code>@Inject private Provider&lt;ProcessorSetup&gt; processors; </code></pre> <p>EDIT FOR MORE CLARIY</p> <p>In a bean I have the following</p> <pre><code>@Inject private Provider&lt;ProcessorSetup&gt; processors; </code></pre> <p>and when I call processors.get(), it steps into guice and then guice correctly invokes ProcessorFactory.get() and I step through that code, and my new enttiy passes through Guice to be returned to the client but is never wired up to anything. This stinks because we have @Inject in those entities we create as well. I know about 2 years ago I had this working on another project related to these posts</p> <p><a href="https://groups.google.com/forum/?fromgroups=#!searchin/google-guice/dean/google-guice/BZn2cnSeX64/MCRgFPjoHH4J" rel="nofollow noreferrer">https://groups.google.com/forum/?fromgroups=#!searchin/google-guice/dean/google-guice/BZn2cnSeX64/MCRgFPjoHH4J</a></p> <p>as I did figure out how to remove the injector at one point finally.</p> <p>thanks, Dean</p>
 

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