org.obiba.magma.datasource.spss.support.CharacterSetValidator.java Source code

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Here is the source code for org.obiba.magma.datasource.spss.support.CharacterSetValidator.java

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/*
 * Copyright (c) 2013 OBiBa. All rights reserved.
 *
 * This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.obiba.magma.datasource.spss.support;

import java.awt.event.KeyEvent;

import javax.annotation.Nullable;

import com.google.common.base.Strings;

public final class CharacterSetValidator {

    private CharacterSetValidator() {
    }

    @SuppressWarnings("ConstantConditions")
    public static void validate(@Nullable String source) throws SpssInvalidCharacterException {
        if (Strings.isNullOrEmpty(source))
            return;

        for (int i = 0; i < source.length(); i++) {
            if (!isPrintableChar(source.charAt(i))) {
                throw new SpssInvalidCharacterException("String contains a non-printable character.", source);
            }
        }

    }

    private static boolean isPrintableChar(char c) {
        Character.UnicodeBlock block = Character.UnicodeBlock.of(c);
        return !Character.isISOControl(c) && c != KeyEvent.CHAR_UNDEFINED && block != null
                && block != Character.UnicodeBlock.SPECIALS;
    }
}