DuplicatedAttributeNames.java

package org.mongodb.morphia.mapping.validation.classrules;


import org.mongodb.morphia.mapping.MappedClass;
import org.mongodb.morphia.mapping.MappedField;
import org.mongodb.morphia.mapping.Mapper;
import org.mongodb.morphia.mapping.validation.ClassConstraint;
import org.mongodb.morphia.mapping.validation.ConstraintViolation;
import org.mongodb.morphia.mapping.validation.ConstraintViolation.Level;

import java.util.HashSet;
import java.util.Set;


/**
 * @author josephpachod
 */
public class DuplicatedAttributeNames implements ClassConstraint {

    @Override
    public void check(final Mapper mapper, final MappedClass mc, final Set<ConstraintViolation> ve) {
        final Set<String> foundNames = new HashSet<String>();
        for (final MappedField mappedField : mc.getPersistenceFields()) {
            for (final String name : mappedField.getLoadNames()) {
                if (!foundNames.add(name)) {
                    ve.add(new ConstraintViolation(Level.FATAL, mc, mappedField, getClass(),
                                                   "Mapping to MongoDB field name '" + name
                                                   + "' is duplicated; you cannot map different java fields to the same MongoDB field."));
                }
            }
        }
    }
}