de.perdian.commons.lang.conversion.impl.converters.ResourceToCharSequenceConverter.java Source code

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Here is the source code for de.perdian.commons.lang.conversion.impl.converters.ResourceToCharSequenceConverter.java

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/*
 * Copyright 2013 Christian Robert
 *
 * 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 de.perdian.commons.lang.conversion.impl.converters;

import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.io.IOUtils;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.io.Resource;

import de.perdian.commons.lang.conversion.ConverterException;

public class ResourceToCharSequenceConverter implements Converter<Resource, CharSequence> {

    @Override
    public CharSequence convert(Resource resource) {
        if (resource == null) {
            return null;
        } else {
            try {
                try (InputStream resourceStream = resource.getInputStream()) {
                    return IOUtils.toString(resourceStream, "UTF-8");
                }
            } catch (IOException e) {
                throw new ConverterException(resource, "Cannot read data from Resource", e);
            }
        }
    }

}