org.moe.designer.gradle.PropertiesUtil.java Source code

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Here is the source code for org.moe.designer.gradle.PropertiesUtil.java

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/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * 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 org.moe.designer.gradle;

import com.google.common.base.Charsets;
import com.google.common.io.Closeables;
import com.intellij.openapi.util.io.FileUtilRt;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.io.*;
import java.util.Properties;

public final class PropertiesUtil {
    private PropertiesUtil() {
    }

    @NotNull
    public static Properties getProperties(@NotNull File filePath) throws IOException {
        if (filePath.isDirectory()) {
            throw new IllegalArgumentException(
                    String.format("The path '%1$s' belongs to a directory!", filePath.getPath()));
        }
        if (!filePath.exists()) {
            return new Properties();
        }
        Properties properties = new Properties();
        Reader reader = null;
        try {
            //noinspection IOResourceOpenedButNotSafelyClosed
            reader = new InputStreamReader(new BufferedInputStream(new FileInputStream(filePath)), Charsets.UTF_8);
            properties.load(reader);
        } finally {
            Closeables.close(reader, true);
        }
        return properties;
    }

    public static void savePropertiesToFile(@NotNull Properties properties, @NotNull File filePath,
            @Nullable String comments) throws IOException {
        FileUtilRt.createParentDirs(filePath);
        FileOutputStream out = null;
        try {
            //noinspection IOResourceOpenedButNotSafelyClosed
            out = new FileOutputStream(filePath);
            // Note that we don't write the properties files in UTF-8; this will *not* write the
            // files with the default platform encoding; instead, it will write it using ISO-8859-1 and
            // \\u escaping syntax for other characters. This will work with older versions of the Gradle
            // plugin which does not read the .properties file with UTF-8 encoding. In the future when
            // nobody is using older (0.7.x) versions of the Gradle plugin anymore we can upgrade this
            properties.store(out, comments);
        } finally {
            Closeables.close(out, true);
        }
    }
}