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    • com.github.ruediste.salta.standard.ScopeImpl Maven / Gradle / Ivy

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    Core of the Salta Framework. Provides most of the infrastructure, but no API

    There is a newer version: 1.1
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    package com.github.ruediste.salta.standard;

import java.util.function.Supplier;

import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import org.objectweb.asm.commons.Method;

import com.github.ruediste.salta.core.Binding;
import com.github.ruediste.salta.core.CompiledSupplier;
import com.github.ruediste.salta.core.RecipeCreationContext;
import com.github.ruediste.salta.core.Scope;
import com.github.ruediste.salta.core.compile.MethodCompilationContext;
import com.github.ruediste.salta.core.compile.SupplierRecipe;
import com.google.common.reflect.TypeToken;

public class ScopeImpl implements Scope {

	private ScopeHandler handler;

	public interface ScopeHandler {
		/**
		 * Scope the given binding
		 * 
		 * @param supplier
		 *            supplier of the unscoped instance
		 * @param binding
		 *            binding beeing scoped
		 * @param requestedType
		 *            type beeing requested by the injection point
		 * @return
		 */
		Supplier scope(Supplier supplier, Binding binding,
				TypeToken requestedType);
	}

	public ScopeImpl(ScopeHandler handler) {
		this.handler = handler;
	}

	@Override
	public SupplierRecipe createRecipe(RecipeCreationContext ctx,
			Binding binding, TypeToken requestedType) {
		CompiledSupplier compilerInnerRecipe = ctx.getCompiler()
				.compileSupplier(binding.getOrCreateRecipe(ctx));

		Supplier scoped = handler.scope(
				compilerInnerRecipe::getNoThrow, binding, requestedType);
		return new SupplierRecipe() {

			@Override
			protected Class compileImpl(GeneratorAdapter mv,
					MethodCompilationContext ctx) {
				ctx.addFieldAndLoad(Supplier.class, scoped);
				mv.invokeInterface(Type.getType(Supplier.class),
						Method.getMethod("Object get()"));
				return Object.class;
			}
		};
	}
}
    
    
    
    

    




    
    
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