org.sonar.server.util.RubyUtils.java Source code

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Here is the source code for org.sonar.server.util.RubyUtils.java

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/*
 * SonarQube
 * Copyright (C) 2009-2017 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.server.util;

import com.google.common.base.Splitter;
import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;
import org.apache.commons.lang.StringUtils;
import org.sonar.api.utils.DateUtils;

import javax.annotation.CheckForNull;
import javax.annotation.Nullable;
import java.util.Date;
import java.util.List;

/**
 * @since 3.6
 */
public class RubyUtils {

    private RubyUtils() {
        // only static methods
    }

    @CheckForNull
    public static List<String> toStrings(@Nullable Object o) {
        List<String> result = null;
        if (o != null) {
            if (o instanceof List) {
                // assume that it contains only strings
                result = (List) o;
            } else if (o instanceof CharSequence) {
                result = Lists.newArrayList(Splitter.on(',').omitEmptyStrings().split((CharSequence) o));
            }
        }
        return result;
    }

    @CheckForNull
    public static <E extends Enum<E>> List<E> toEnums(@Nullable Object o, Class<E> enumClass) {
        if (o == null) {
            return null;
        }
        List<E> result = Lists.newArrayList();
        if (o instanceof List) {
            for (String s : (List<String>) o) {
                result.add(Enum.valueOf(enumClass, s));
            }
        } else if (o instanceof CharSequence) {
            for (String s : Splitter.on(',').omitEmptyStrings().split((CharSequence) o)) {
                result.add(Enum.valueOf(enumClass, s));
            }
        } else {
            throw new IllegalArgumentException("Unsupported type: " + o.getClass());
        }
        return result;
    }

    @CheckForNull
    public static Integer toInteger(@Nullable Object o) {
        if (o == null) {
            return null;
        }
        if (o instanceof Integer) {
            return (Integer) o;
        }
        if (o instanceof Long) {
            return Ints.checkedCast((Long) o);
        }
        if (o instanceof String) {
            if (StringUtils.isBlank((String) o)) {
                return null;
            }
            return Integer.parseInt((String) o);
        }
        throw new IllegalArgumentException("Unsupported type for integer: " + o.getClass());
    }

    @CheckForNull
    public static Double toDouble(@Nullable Object o) {
        if (o == null) {
            return null;
        }
        if (o instanceof Double) {
            return (Double) o;
        }
        if (o instanceof Integer) {
            return ((Integer) o).doubleValue();
        }
        if (o instanceof Long) {
            return ((Long) o).doubleValue();
        }
        if (o instanceof String) {
            if (StringUtils.isBlank((String) o)) {
                return null;
            }
            return Double.parseDouble((String) o);
        }
        throw new IllegalArgumentException("Unsupported type for double: " + o.getClass());
    }

    @CheckForNull
    public static Date toDate(@Nullable Object o) {
        if (o == null) {
            return null;
        }
        if (o instanceof Date) {
            return (Date) o;
        }
        if (o instanceof String) {
            if (StringUtils.isBlank((String) o)) {
                return null;
            }
            Date date = DateUtils.parseDateTimeQuietly((String) o);
            if (date != null) {
                return date;
            }
            return DateUtils.parseDate((String) o);
        }
        throw new IllegalArgumentException("Unsupported type for date: " + o.getClass());
    }

    @CheckForNull
    public static Boolean toBoolean(@Nullable Object o) {
        if (o == null) {
            return null;
        }
        if (o instanceof Boolean) {
            return (Boolean) o;
        }
        if (o instanceof String) {
            if (StringUtils.isBlank((String) o)) {
                return null;
            }
            return Boolean.parseBoolean((String) o);
        }
        throw new IllegalArgumentException("Unsupported type for boolean: " + o.getClass());
    }

    @CheckForNull
    public static Long toLong(@Nullable Object o) {
        if (o == null) {
            return null;
        }
        if (o instanceof Integer) {
            return ((Integer) o).longValue();
        }
        if (o instanceof Long) {
            return (Long) o;
        }
        if (o instanceof String) {
            if (StringUtils.isBlank((String) o)) {
                return null;
            }
            return Long.parseLong((String) o);
        }
        throw new IllegalArgumentException("Unsupported type for long: " + o.getClass());
    }
}