fr.rjoakim.app.checklink.utils.FileResource.java Source code

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Here is the source code for fr.rjoakim.app.checklink.utils.FileResource.java

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package fr.rjoakim.app.checklink.utils;

import java.io.FileInputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Properties;

import com.google.common.base.Charsets;
import com.google.common.base.Strings;
import com.google.common.io.Resources;
import com.google.inject.Singleton;

import fr.rjoakim.app.checklink.exceptions.FileResourceServiceException;

/**
 * 
 * Copyright 2013 Joakim Ribier
 * 
 * 
 * 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.
 * 
 */
@Singleton
public class FileResource implements FileResourceService {

    public FileResource() {
    }

    @Override
    public String getContent(String filename) throws FileResourceServiceException {
        if (Strings.isNullOrEmpty(filename)) {
            throw new IllegalArgumentException("filename argument is required.");
        }

        try {
            URL url = Resources.getResource(filename);
            return Resources.toString(url, Charsets.UTF_8);
        } catch (IOException e) {
            throw new FileResourceServiceException(e.getMessage(), e);
        }
    }

    @Override
    public Properties load(String filename) throws FileResourceServiceException {
        if (Strings.isNullOrEmpty(filename)) {
            throw new IllegalArgumentException("filename argument is required.");
        }

        FileInputStream in = null;
        try {
            Properties properties = new Properties();
            in = new FileInputStream(filename);
            properties.load(in);
            in.close();
            return properties;
        } catch (IOException e) {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e1) {
                    // -- maybe already closed
                }
            }
            throw new FileResourceServiceException(e.getMessage(), e);
        }
    }
}