jp.ac.u.tokyo.m.resource.ResourceLoadUtil.java Source code

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Here is the source code for jp.ac.u.tokyo.m.resource.ResourceLoadUtil.java

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/*
 * Copyright 2012 Hiromasa Horiguchi ( The University of Tokyo )
 * 
 * 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 jp.ac.u.tokyo.m.resource;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import jp.ac.u.tokyo.m.ini.Ini;

import org.apache.commons.logging.LogFactory;

public class ResourceLoadUtil {

    // -----------------------------------------------------------------------------------------------------------------

    /**
     * This method read Ini in the same package. <br>
     * If the file does not exist, throws exception. <br>
     * <br>
     * aFileName ????? Ini ???? <br>
     * ?????? <br>
     */
    public static Ini loadNecessaryPackagePrivateIni(Class<?> aClass, String aFileName) {
        return loadNecessaryIni(aClass, aFileName, aClass.getResourceAsStream(aFileName));
    }

    /**
     * This method read Ini in the jar. <br>
     * If the file does not exist, throws exception. <br>
     * <br>
     * aFileName ??jar? Ini ???? <br>
     * ?????? <br>
     */
    public static Ini loadNecessaryPublicIni(Class<?> aClass, String aFileName) {
        return loadNecessaryIni(aClass, aFileName, aClass.getClassLoader().getResourceAsStream(aFileName));
    }

    private static Ini loadNecessaryIni(Class<?> aClass, String aFileName, InputStream aResourceAsStream) {
        try {
            return loadIni(aClass, aFileName, aResourceAsStream);
        } catch (NullPointerException e) {
            throw new RuntimeException(new FileNotFoundException(aClass.getPackage() + "." + aFileName));
        }
    }

    /**
     * This method read Ini in the same package. <br>
     * If the file does not exist, logging WARN. <br>
     * <br>
     * aFileName ????? Ini ???? <br>
     * ???????? <br>
     */
    public static Ini loadUnnecessaryPackagePrivateIni(Class<?> aClass, String aFileName) {
        try {
            return loadIni(aClass, aFileName, aClass.getResourceAsStream(aFileName));
        } catch (NullPointerException e) {
            LogFactory.getLog(aClass).warn("not found : " + aClass.getPackage() + "." + aFileName);
            return new Ini();
        }
    }

    private static Ini loadIni(Class<?> aClass, String aFileName, InputStream aResourceAsStream)
            throws NullPointerException {
        try {
            try {
                Ini tIni = new Ini();
                tIni.load(aResourceAsStream);
                return tIni;
            } finally {
                aResourceAsStream.close();
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    // -----------------------------------------------------------------------------------------------------------------

    /**
     * This method read Properties in the same package. <br>
     * If the file does not exist, throws exception. <br>
     * <br>
     * aFileName ????? Properties ???? <br>
     * ?????? <br>
     */
    public static Properties loadNecessaryPackagePrivateProperties(Class<?> aClass, String aFileName) {
        try {
            return loadProperties(aClass, aFileName, aClass.getResourceAsStream(aFileName));
        } catch (NullPointerException e) {
            throw new RuntimeException(new FileNotFoundException(aClass.getPackage() + "." + aFileName));
        }
    }

    /**
     * This method read Properties in the same package. <br>
     * If the file does not exist, logging WARN. <br>
     * <br>
     * aFileName ????? Properties ???? <br>
     * ???????? <br>
     */
    public static Properties loadUnnecessaryPackagePrivateProperties(Class<?> aClass, String aFileName) {
        try {
            return loadProperties(aClass, aFileName, aClass.getResourceAsStream(aFileName));
        } catch (NullPointerException e) {
            LogFactory.getLog(aClass).warn("not found : " + aClass.getPackage() + "." + aFileName);
            return new Properties();
        }
    }

    private static Properties loadProperties(Class<?> aClass, String aFileName, InputStream aResourceAsStream)
            throws NullPointerException {
        try {
            try {
                Properties tProperties = new Properties();
                tProperties.load(aResourceAsStream);
                return tProperties;
            } finally {
                aResourceAsStream.close();
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    // -----------------------------------------------------------------------------------------------------------------

}