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AbstractPathExpression.java
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AbstractPathExpression.java
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package cz.cvut.kbss.jopa.query.criteria.expressions;
import cz.cvut.kbss.jopa.model.metamodel.Attribute;
import cz.cvut.kbss.jopa.model.metamodel.Metamodel;
import cz.cvut.kbss.jopa.model.metamodel.SingularAttribute;
import cz.cvut.kbss.jopa.model.query.criteria.Path;
import cz.cvut.kbss.jopa.query.criteria.PathImpl;
import cz.cvut.kbss.jopa.sessions.CriteriaFactory;
abstract public class AbstractPathExpression<X> extends AbstractExpression<X> implements Path<X> {
protected AbstractPathExpression pathSource;
protected final Metamodel metamodel;
public AbstractPathExpression(Class<X> type, AbstractPathExpression pathSource, Metamodel metamodel, CriteriaFactory factory) {
super(type, factory);
this.pathSource = pathSource;
this.metamodel = metamodel;
}
public <Y> Path<Y> getAttr(String attributeName) throws IllegalArgumentException {
Attribute attribute = metamodel.entity(type).getAttribute(attributeName);
Path<Y> newPathSource = new PathImpl<Y>(this.metamodel,new ExpressionAttributeImpl(attribute.getJavaType(), this.pathSource, this.metamodel, attribute,this.factory),attribute.getJavaType(),this.factory);
return newPathSource;
}
public <Y> Path<Y> getAttr(SingularAttribute<? super X, Y> attribute) {
Path<Y> newPathSource = new PathImpl<Y>(this.metamodel, new ExpressionAttributeImpl(attribute.getJavaType(), this.pathSource, this.metamodel, attribute, this.factory),attribute.getJavaType(),this.factory);
return newPathSource;
}
public Path<?> getParentPath() {
return this.pathSource;
}
}