org.flowable.content.engine.impl.fs.FileSystemContentObject Maven / Gradle / Ivy
/* 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.flowable.content.engine.impl.fs;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import org.flowable.content.api.ContentObject;
import org.flowable.content.api.ContentStorageException;
/**
*
* {@link ContentObject}, backed by a file.
*
* @author Frederik Heremans
*/
public class FileSystemContentObject implements ContentObject {
protected File file;
protected InputStream inputStream;
protected String id;
protected Long length;
public FileSystemContentObject(File file, String id) {
this.file = file;
this.id = id;
}
public FileSystemContentObject(File file, String id, Long length) {
this(file, id);
this.length = length;
}
@Override
public String getId() {
return id;
}
@Override
public long getContentLength() {
if (length == null) {
length = file.length();
}
return length;
}
@Override
public InputStream getContent() {
if (inputStream == null) {
try {
inputStream = new FileInputStream(file);
} catch (FileNotFoundException e) {
throw new ContentStorageException("Error while opening file stream", e);
}
}
return inputStream;
}
}