com.b2international.commons.validation.ConstraintViolations.java Source code

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Here is the source code for com.b2international.commons.validation.ConstraintViolations.java

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/*
 * Copyright 2011-2015 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.b2international.commons.validation;

import java.util.Collection;
import java.util.Set;

import javax.validation.ConstraintViolation;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Ordering;
import com.google.common.collect.Sets;

/**
 * @since 3.4
 */
public class ConstraintViolations {

    private ConstraintViolations() {
    }

    /**
     * Formats the given {@link ConstraintViolation} to a readable format.
     * 
     * @param violation
     * @return
     */
    public static <T> String format(ConstraintViolation<T> violation) {
        return String.format("'%s' %s (was '%s')", violation.getPropertyPath(), violation.getMessage(),
                violation.getInvalidValue());
    }

    /**
     * Formats the given set of {@link ConstraintViolation} to a list of
     * readable format.
     * 
     * @param violations
     * @return
     */
    public static ImmutableList<String> format(Collection<? extends ConstraintViolation<?>> violations) {
        final Set<String> errors = Sets.newHashSet();
        for (ConstraintViolation<?> v : violations) {
            errors.add(format(v));
        }
        return ImmutableList.copyOf(Ordering.natural().sortedCopy(errors));
    }

}