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Provides a POJO centric model as per Spring Data interfaces to interact with Amazon SimpleDB, a non-relational datastore

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package org.springframework.data.simpledb.query;

import org.springframework.data.repository.core.NamedQueries;
import org.springframework.data.repository.core.RepositoryMetadata;
import org.springframework.data.repository.query.QueryLookupStrategy;
import org.springframework.data.repository.query.RepositoryQuery;
import org.springframework.data.simpledb.annotation.Query;
import org.springframework.data.simpledb.core.SimpleDbOperations;

import java.lang.reflect.Method;

/**
 * Query lookup strategy to execute custom interface query methods 

 * Multiple query lookup strategies can be created and combined here:
 * 
 * create query from method name
 * from custom query annotations
 * 
 * 
 * {@link QueryLookupStrategy} that tries to detect a declared query declared via simple db custom {@link Query}
 * annotation.
 */
public final class SimpleDbQueryLookupStrategy implements QueryLookupStrategy {

	private SimpleDbOperations simpleDbOperations;

	public SimpleDbQueryLookupStrategy(SimpleDbOperations simpleDbOperations) {
		this.simpleDbOperations = simpleDbOperations;
	}

	@Override
	public RepositoryQuery resolveQuery(Method method, RepositoryMetadata metadata, NamedQueries namedQueries) {
		SimpleDbQueryMethod queryMethod;
		
		if(SimpleDbQueryMethod.isAnnotatedQuery(method)) {
			queryMethod = new SimpleDbQueryMethod(method, metadata, simpleDbOperations.getSimpleDb()
					.getSimpleDbDomain());
		} else {
			queryMethod = new SimpleDbPartTreeQueryMethod(method, metadata, simpleDbOperations.getSimpleDb()
					.getSimpleDbDomain());
		}
		
		return SimpleDbRepositoryQuery.fromQueryAnnotation(queryMethod, simpleDbOperations);
	}

	public static QueryLookupStrategy create(SimpleDbOperations simpleDbOperations, QueryLookupStrategy.Key key) {
		// TODO check in Spring data core key switching and their semantics (look in spring-data-jpa)
		return new SimpleDbQueryLookupStrategy(simpleDbOperations);
	}
}