org.springframework.data.mongodb.gridfs.GridFsResource.java Source code

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Here is the source code for org.springframework.data.mongodb.gridfs.GridFsResource.java

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/*
 * Copyright 2011 the original author or authors.
 *
 * 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.springframework.data.mongodb.gridfs;

import java.io.IOException;

import org.springframework.core.io.InputStreamResource;
import org.springframework.core.io.Resource;

import com.mongodb.gridfs.GridFSDBFile;

/**
 * {@link GridFSDBFile} based {@link Resource} implementation.
 * 
 * @author Oliver Gierke
 */
public class GridFsResource extends InputStreamResource {

    private final GridFSDBFile file;

    /**
     * Creates a new {@link GridFsResource} from the given {@link GridFSDBFile}.
     * 
     * @param file must not be {@literal null}.
     */
    public GridFsResource(GridFSDBFile file) {
        super(file.getInputStream());
        this.file = file;
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.core.io.AbstractResource#contentLength()
     */
    @Override
    public long contentLength() throws IOException {
        return file.getLength();
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.core.io.AbstractResource#getFilename()
     */
    @Override
    public String getFilename() throws IllegalStateException {
        return file.getFilename();
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.core.io.AbstractResource#lastModified()
     */
    @Override
    public long lastModified() throws IOException {
        return file.getUploadDate().getTime();
    }

    /**
     * Returns the {@link Resource}'s id.
     * 
     * @return
     */
    public Object getId() {
        return file.getId();
    }

    /**
     * Returns the {@link Resource}'s content type.
     * 
     * @return
     */
    public String getContentType() {
        return file.getContentType();
    }
}