com.haulmont.cuba.gui.components.validators.DoubleValidator.java Source code

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Here is the source code for com.haulmont.cuba.gui.components.validators.DoubleValidator.java

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/*
 * Copyright (c) 2008-2016 Haulmont.
 *
 * 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.haulmont.cuba.gui.components.validators;

import com.haulmont.chile.core.datatypes.Datatype;
import com.haulmont.chile.core.datatypes.Datatypes;
import com.haulmont.chile.core.datatypes.impl.DoubleDatatype;
import com.haulmont.cuba.core.global.AppBeans;
import com.haulmont.cuba.core.global.Messages;
import com.haulmont.cuba.core.global.UserSessionSource;
import com.haulmont.cuba.gui.components.Field;
import com.haulmont.cuba.gui.components.ValidationException;
import org.apache.commons.lang.ObjectUtils;
import org.dom4j.Element;

import java.math.BigDecimal;
import java.text.ParseException;

public class DoubleValidator implements Field.Validator {

    protected String message;
    protected String messagesPack;
    protected String onlyPositive;
    protected Messages messages = AppBeans.get(Messages.NAME);

    public DoubleValidator(Element element, String messagesPack) {
        message = element.attributeValue("message");
        onlyPositive = element.attributeValue("onlyPositive");
        this.messagesPack = messagesPack;
    }

    public DoubleValidator(String message) {
        this.message = message;
    }

    public DoubleValidator() {
        this.message = messages.getMainMessage("validation.invalidNumber");
    }

    private boolean checkDoubleOnPositive(Double value) {
        return !ObjectUtils.equals("true", onlyPositive) || value >= 0;
    }

    private boolean checkBigDecimalOnPositive(BigDecimal value) {
        return !ObjectUtils.equals("true", onlyPositive) || value.compareTo(BigDecimal.ZERO) >= 0;
    }

    @Override
    public void validate(Object value) throws ValidationException {
        boolean result;
        if (value instanceof String) {
            try {
                Datatype<Double> datatype = Datatypes.get(DoubleDatatype.NAME);
                UserSessionSource sessionSource = AppBeans.get(UserSessionSource.NAME);
                Double num = datatype.parse((String) value, sessionSource.getLocale());
                result = checkDoubleOnPositive(num);
            } catch (ParseException e) {
                result = false;
            }
        } else {
            result = (value instanceof Double && checkDoubleOnPositive((Double) value))
                    || (value instanceof BigDecimal && checkBigDecimalOnPositive((BigDecimal) value));
        }

        if (!result) {
            String msg = message != null ? messages.getTools().loadString(messagesPack, message)
                    : "Invalid value '%s'";
            throw new ValidationException(String.format(msg, value));
        }
    }
}