org.jooby.internal.AssetFormatter.java Source code

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Here is the source code for org.jooby.internal.AssetFormatter.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.jooby.internal;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.List;

import org.jooby.Asset;
import org.jooby.Body;
import org.jooby.MediaType;

import com.google.common.io.ByteStreams;
import com.google.common.io.CharStreams;

public class AssetFormatter implements Body.Formatter {

    @Override
    public boolean canFormat(final Class<?> type) {
        return Asset.class.isAssignableFrom(type);
    }

    @Override
    public List<MediaType> types() {
        return MediaType.ALL;
    }

    @Override
    public void format(final Object body, final Body.Writer writer) throws Exception {
        Asset asset = (Asset) body;
        MediaType type = asset.type();

        if (type.isText()) {
            writer.text(to -> {
                try (Reader from = new InputStreamReader(asset.stream(), writer.charset())) {
                    CharStreams.copy(from, to);
                }
            });
        } else {
            writer.bytes(to -> {
                try (InputStream from = asset.stream()) {
                    ByteStreams.copy(from, to);
                }
            });
        }
    }
}