package com.ajjpj.amapper.javabean.mappingdef;
import com.ajjpj.abase.collection.AEquality;
import com.ajjpj.abase.collection.immutable.AMap;
import com.ajjpj.amapper.core.AMapperDiffWorker;
import com.ajjpj.amapper.core.AMapperWorker;
import com.ajjpj.amapper.core.AValueMappingDef;
import com.ajjpj.amapper.core.compile.ACodeSnippet;
import com.ajjpj.amapper.core.compile.AInlineableValueMappingDef;
import com.ajjpj.amapper.core.diff.ADiffBuilder;
import com.ajjpj.amapper.core.diff.ADiffElement;
import com.ajjpj.amapper.core.path.APath;
import com.ajjpj.amapper.core.tpe.AQualifiedSourceAndTargetType;
import com.ajjpj.amapper.javabean.JavaBeanType;
import com.ajjpj.amapper.javabean.JavaBeanTypes;
/**
* @author arno
*/
public class PassThroughValueMappingDef<T> implements AValueMappingDef<T,T,Object>, AInlineableValueMappingDef { //TODO show this in the documentation
protected final JavaBeanType<T> tpe;
public PassThroughValueMappingDef(Class<T> cls) {
this.tpe = JavaBeanTypes.create(cls);
}
@Override public boolean canHandle(AQualifiedSourceAndTargetType types) {
return tpe.equals(types.sourceType()) && tpe.equals (types.targetType());
}
@Override public T map(T sourceValue, AQualifiedSourceAndTargetType types, AMapperWorker<?> worker, AMap<String, Object> context) {
return sourceValue;
}
@Override public void diff(ADiffBuilder diff, T sourceOld, T sourceNew, AQualifiedSourceAndTargetType types, AMapperDiffWorker<?> worker, AMap<String, Object> contextOld, AMap<String, Object> contextNew, APath path, boolean isDerived) {
if(! AEquality.EQUALS.equals(sourceOld, sourceNew)) {
diff.add(ADiffElement.attribute(path, isDerived, sourceOld, sourceNew));
}
}
@Override public ACodeSnippet javaCodeForMap(ACodeSnippet sourceValue, AQualifiedSourceAndTargetType types) {
return new ACodeSnippet(sourceValue.getCode());
}
@Override public ACodeSnippet javaCodeForDiff(ACodeSnippet sourceOld, ACodeSnippet sourceNew, AQualifiedSourceAndTargetType types) {
final String result = "if(! com.ajjpj.amapper.util.coll.AEquality.EQUALS.equals(" + sourceOld.getCode() + ", " + sourceNew.getCode() +
") { diff.add(com.ajjpj.amapper.core.diff.ADiffElement.attribute(path, isDerived, " + sourceOld.getCode() + ", " + sourceNew.getCode() + "; }";
return new ACodeSnippet(result);
}
}