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added reflection based FactoryMap implementation

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This commit is contained in:
Timo Westkämper 2009-01-07 13:27:24 +00:00
parent 1274c8b0b4
commit 75fe6532e0
1 changed files with 20 additions and 4 deletions
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24
querydsl-collections/src/main/java/com/mysema/query/collections/alias/AliasFactory.java
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@ -11,6 +11,8 @@ import net.sf.cglib.proxy.MethodInterceptor;
import com.mysema.query.grammar.types.Expr;
import com.mysema.query.grammar.types.Path;
import com.mysema.query.grammar.types.PathMetadata;
import com.mysema.query.grammar.types.Path.PSimple;
import com.mysema.query.util.FactoryMap;
/**
* AliasFactory provides
@ -29,6 +31,20 @@ public class AliasFactory {
private final ThreadLocal<Expr<?>> current = new ThreadLocal<Expr<?>>();
// caches top level paths (class/var as key)
private FactoryMap<PSimple<?>> pathCache = new FactoryMap<PSimple<?>>(){
public <A> PSimple<A> create(Class<A> cl, String var){
return new Path.PSimple<A>(cl, PathMetadata.forVariable(var));
}
};
// cahces top level proxies (class/var as key)
private FactoryMap<Object> proxyCache = new FactoryMap<Object>(){
public <A> Object create(Class<A> cl, String var){
return createProxy(cl);
}
};
public <A> A createAliasForProp(Class<A> cl, Object parent, Expr<?> path){
A proxy = createProxy(cl);
if (!cl.getPackage().getName().equals("java.lang")){
@ -36,11 +52,11 @@ public class AliasFactory {
}
return proxy;
}
@SuppressWarnings("unchecked")
public <A> A createAliasForVar(Class<A> cl, String var){
// TODO : cache cl, var pairs
Expr<?> path = new Path.PSimple<A>(cl, PathMetadata.forVariable(var));
A proxy = createProxy(cl);
Expr<?> path = pathCache.get(cl,var);
A proxy = (A) proxyCache.get(cl, var);
bindings.get().put(proxy, path);
return proxy;
}