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added caching of Class constants

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This commit is contained in:
Timo Westkämper 2009-04-21 09:53:09 +00:00
parent 6db1042479
commit 97e9564ad6
2 changed files with 33 additions and 15 deletions
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2
querydsl-core/src/main/java/com/mysema/query/grammar/types/ExprFactory.java
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@ -21,6 +21,8 @@ public interface ExprFactory {
Expr<Integer> createConstant(int i);
<A> Expr<Class<A>> createConstant(Class<A> obj);
<A> Expr<A> createConstant(A obj);
EBoolean createBoolean(Op<Boolean> operator, Expr<?>... args);

46
querydsl-core/src/main/java/com/mysema/query/grammar/types/SimpleExprFactory.java
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@ -5,6 +5,9 @@
*/
package com.mysema.query.grammar.types;
import java.util.HashMap;
import java.util.Map;
import com.mysema.query.grammar.Ops.Op;
import com.mysema.query.grammar.types.Expr.EBoolean;
import com.mysema.query.grammar.types.Expr.EComparable;
@ -29,9 +32,7 @@ public class SimpleExprFactory implements ExprFactory{
private static final ExprFactory instance = new SimpleExprFactory();
public static ExprFactory getInstance(){
return instance;
}
private final Map<Class<?>,Expr<?>> classToExpr = new HashMap<Class<?>,Expr<?>>();
@SuppressWarnings("unchecked")
private final Expr<Integer>[] integers = new Expr[256];
@ -42,12 +43,16 @@ public class SimpleExprFactory implements ExprFactory{
}
}
public Expr<Integer> createConstant(int i){
if (i >= -128 && i <= 127) {
return integers[i+128];
}else{
return new EConstant<Integer>(i);
}
public static ExprFactory getInstance(){
return instance;
}
public EBoolean createBoolean(Op<Boolean> operator, Expr<?>... args) {
return new OBoolean(Assert.notNull(operator), Assert.notNull(args));
}
public <OpType, RT extends Comparable<?>> EComparable<RT> createComparable(Class<RT> type, Op<OpType> operator, Expr<?>... args) {
return new OComparable<OpType,RT>(type, Assert.notNull(operator), Assert.notNull(args));
}
@SuppressWarnings("unchecked")
@ -59,22 +64,33 @@ public class SimpleExprFactory implements ExprFactory{
}
}
public EBoolean createBoolean(Op<Boolean> operator, Expr<?>... args) {
return new OBoolean(Assert.notNull(operator), Assert.notNull(args));
@SuppressWarnings("unchecked")
public <A> Expr<Class<A>> createConstant(Class<A> obj) {
if (classToExpr.containsKey(obj)){
return (Expr<Class<A>>) classToExpr.get(obj);
}else{
Expr<Class<A>> expr = new EConstant<Class<A>>(obj);
classToExpr.put(obj, expr);
return expr;
}
}
public <OpType, RT extends Comparable<?>> EComparable<RT> createComparable(Class<RT> type, Op<OpType> operator, Expr<?>... args) {
return new OComparable<OpType,RT>(type, Assert.notNull(operator), Assert.notNull(args));
public Expr<Integer> createConstant(int i){
if (i >= -128 && i <= 127) {
return integers[i+128];
}else{
return new EConstant<Integer>(i);
}
}
public <OpType extends Number,D extends Number & Comparable<?>> ENumber<D> createNumber(Class<? extends D> type, Op<OpType> operator, Expr<?>... args) {
return new ONumber<OpType,D>(type, Assert.notNull(operator), Assert.notNull(args));
}
public EString createString(Op<String> operator, Expr<?>... args) {
return new OString(Assert.notNull(operator), Assert.notNull(args));
}
public Expr<String[]> createStringArray(Op<String> operator, Expr<?>... args) {
return new OStringArray(Assert.notNull(operator), Assert.notNull(args));
}