net.dontdrinkandroot.utils.resource.CachedFileResource.java Source code

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Here is the source code for net.dontdrinkandroot.utils.resource.CachedFileResource.java

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/**
 * Copyright (C) 2012 Philip W. Sorst <philip@sorst.net>
 * and individual contributors as indicated
 * by the @authors tag.
 *
 * 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 net.dontdrinkandroot.utils.resource;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;

import net.dontdrinkandroot.utils.resource.StreamableWebResource;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;

public class CachedFileResource extends StreamableWebResource {

    private final File file;

    private Long expiry;

    private String fileName;

    public CachedFileResource(final File file) {

        this.file = file;
    }

    @Override
    public void write(final OutputStream os) throws IOException {

        final FileInputStream fis = new FileInputStream(this.file);
        IOUtils.copy(fis, os);
        IOUtils.closeQuietly(fis);
    }

    @Override
    public Integer getErrorCode() {

        if (!this.file.exists()) {
            return 404;
        }

        return null;
    }

    @Override
    public String getErrorMessage() {

        if (!this.file.exists()) {
            return "Not found";
        }

        return null;
    }

    @Override
    public String getFileName() {

        return this.fileName;
    }

    @Override
    public String getContentType() {

        final String extension = FilenameUtils.getExtension(this.file.getName());

        if ("png".equals(extension)) {
            return "image/png";
        }

        return null;
    }

    @Override
    public String getTextEncoding() {

        return null;
    }

    @Override
    public Long getContentLength() {

        return this.file.length();
    }

    @Override
    public Long getLastModified() {

        return this.file.lastModified();
    }

    @Override
    public Long getExpiry() {

        return this.expiry;
    }

    public StreamableWebResource setExpiry(final Long expiry) {

        this.expiry = expiry;

        return this;
    }

    public void setFileName(final String fileName) {

        this.fileName = fileName;
    }
}