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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.pagetemplates.engine.resolvers;
import com.google.inject.Inject;
import com.yahoo.component.AbstractComponent;
import com.yahoo.component.ComponentId;
import com.yahoo.component.provider.ComponentRegistry;
import com.yahoo.search.pagetemplates.engine.Resolver;
import java.util.List;
import java.util.logging.Logger;
/**
* A registry of available resolver components
*
* @author bratseth
*/
public class ResolverRegistry extends ComponentRegistry<Resolver> {
private final Resolver defaultResolver;
public ResolverRegistry(List<Resolver> resolvers) {
addBuiltInResolvers();
for (Resolver component : resolvers)
registerResolver(component);
defaultResolver = decideDefaultResolver();
freeze();
}
private void addBuiltInResolvers() {
registerResolver(createNativeDeterministicResolver());
registerResolver(createNativeRandomResolver());
}
private Resolver decideDefaultResolver() {
Resolver defaultResolver = getComponent("default");
if (defaultResolver != null) return defaultResolver;
return getComponent("native.random");
}
private Resolver createNativeRandomResolver() {
RandomResolver resolver = new RandomResolver();
resolver.initId(ComponentId.fromString(RandomResolver.nativeId));
return resolver;
}
private DeterministicResolver createNativeDeterministicResolver() {
DeterministicResolver resolver = new DeterministicResolver();
resolver.initId(ComponentId.fromString(DeterministicResolver.nativeId));
return resolver;
}
private void registerResolver(Resolver resolver) {
super.register(resolver.getId(), resolver);
}
public Resolver defaultResolver() { return defaultResolver; }
}
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