org.apache.tajo.validation.MinValidator.java Source code

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Here is the source code for org.apache.tajo.validation.MinValidator.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.tajo.validation;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collection;
import java.util.Collections;

import org.apache.commons.lang.math.NumberUtils;

public class MinValidator extends AbstractValidator {

    private final String minValue;

    public MinValidator(String minValue) {
        if (!NumberUtils.isNumber(minValue)) {
            throw new IllegalArgumentException(minValue + " is not a Java Number.");
        }

        this.minValue = minValue;
    }

    @Override
    protected <T> String getErrorMessage(T object) {
        return object + " should be greater than " + minValue;
    }

    @Override
    protected <T> boolean validateInternal(T object) {
        boolean result = false;

        if (object != null) {
            if ((object instanceof Byte) || (object instanceof Short) || (object instanceof Integer)) {
                Integer objInteger = Integer.decode(object.toString());
                Integer minInteger = Integer.decode(minValue);
                result = objInteger.compareTo(minInteger) >= 0;
            } else if (object instanceof Long) {
                Long objLong = Long.decode(object.toString());
                Long minLong = Long.decode(minValue);
                result = objLong.compareTo(minLong) >= 0;
            } else if ((object instanceof Float) || (object instanceof Double)) {
                Double objDouble = Double.valueOf(object.toString());
                Double minDouble = Double.valueOf(minValue);
                result = objDouble.compareTo(minDouble) >= 0;
            } else if (object instanceof BigInteger) {
                BigInteger objInteger = (BigInteger) object;
                BigInteger minInteger = new BigInteger(minValue);
                result = objInteger.compareTo(minInteger) >= 0;
            } else if (object instanceof BigDecimal) {
                BigDecimal objDecimal = (BigDecimal) object;
                BigDecimal minDecimal = new BigDecimal(minValue);
                result = objDecimal.compareTo(minDecimal) >= 0;
            } else if (object instanceof String) {
                BigDecimal objDecimal = new BigDecimal((String) object);
                BigDecimal minDecimal = new BigDecimal(minValue);
                result = objDecimal.compareTo(minDecimal) >= 0;
            }
        } else {
            result = true;
        }

        return result;
    }

    @Override
    protected Collection<Validator> getDependantValidators() {
        return Collections.emptySet();
    }

}