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This commit is contained in:
Timo Westkämper 2010-06-04 19:40:08 +00:00
parent 022d91ba6b
commit 05cc5a7ed5
1 changed files with 35 additions and 31 deletions
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66
querydsl-collections/src/main/java/com/mysema/query/collections/ExprEvaluatorFactory.java
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@ -62,6 +62,37 @@ public class ExprEvaluatorFactory {
this.factory = new EvaluatorFactory(classLoader, compiler);
}
public <T> Evaluator<T> create(List<? extends Expr<?>> sources, Expr<T> projection) {
ColQuerySerializer serializer = new ColQuerySerializer(templates);
serializer.handle(projection);
Map<Object,String> constantToLabel = serializer.getConstantToLabel();
Map<String,Object> constants = new HashMap<String,Object>();
for (Map.Entry<Object,String> entry : constantToLabel.entrySet()){
constants.put(entry.getValue(), entry.getKey());
}
Class<?>[] types = new Class<?>[sources.size()];
String[] names = new String[sources.size()];
for (int i = 0; i < sources.size(); i++) {
types[i] = sources.get(i).getType();
names[i] = sources.get(i).toString();
}
// normalize types
for (int i = 0; i < types.length; i++){
if (ClassUtils.wrapperToPrimitive(types[i]) != null){
types[i] = ClassUtils.wrapperToPrimitive(types[i]);
}
}
String javaSource = serializer.toString();
if (projection instanceof EConstructor<?>){
javaSource = "("+com.mysema.codegen.ClassUtils.getName(projection.getType())+")(" + javaSource+")";
}
return factory.createEvaluator("return " + javaSource +";", projection.getType(), names, types, constants);
}
@SuppressWarnings("unchecked")
public <T> Evaluator<List<T>> createEvaluator(Expr<? extends T> source, EBoolean filter){
String typeName = com.mysema.codegen.ClassUtils.getName(source.getType());
@ -100,6 +131,8 @@ public class ExprEvaluatorFactory {
StringBuilder vars = new StringBuilder();
ColQuerySerializer ser = new ColQuerySerializer(templates);
ser.append("java.util.List<Object[]> rv = new java.util.ArrayList<Object[]>();\n");
// creating context
for (JoinExpression join : joins){
Expr<?> target = join.getTarget();
String typeName = com.mysema.codegen.ClassUtils.getName(target.getType());
@ -127,6 +160,7 @@ public class ExprEvaluatorFactory {
}
}
// filter
if (filter != null){
ser.append("if (").handle(filter).append("){\n");
ser.append(" rv.add(new Object[]{"+vars+"});\n");
@ -135,6 +169,7 @@ public class ExprEvaluatorFactory {
ser.append("rv.add(new Object[]{"+vars+"});\n");
}
// closing context
for (int i = 0; i < joins.size(); i++){
ser.append("}\n");
}
@ -155,37 +190,6 @@ public class ExprEvaluatorFactory {
sourceClasses.toArray(new Class[sourceClasses.size()]),
constants);
}
public <T> Evaluator<T> create(List<? extends Expr<?>> sources, Expr<T> projection) {
ColQuerySerializer serializer = new ColQuerySerializer(templates);
serializer.handle(projection);
Map<Object,String> constantToLabel = serializer.getConstantToLabel();
Map<String,Object> constants = new HashMap<String,Object>();
for (Map.Entry<Object,String> entry : constantToLabel.entrySet()){
constants.put(entry.getValue(), entry.getKey());
}
Class<?>[] types = new Class<?>[sources.size()];
String[] names = new String[sources.size()];
for (int i = 0; i < sources.size(); i++) {
types[i] = sources.get(i).getType();
names[i] = sources.get(i).toString();
}
// normalize types
for (int i = 0; i < types.length; i++){
if (ClassUtils.wrapperToPrimitive(types[i]) != null){
types[i] = ClassUtils.wrapperToPrimitive(types[i]);
}
}
String javaSource = serializer.toString();
if (projection instanceof EConstructor<?>){
javaSource = "("+com.mysema.codegen.ClassUtils.getName(projection.getType())+")(" + javaSource+")";
}
return factory.createEvaluator("return " + javaSource +";", projection.getType(), names, types, constants);
}
}