// Copyright (c) 2003-2014, Jodd Team (jodd.org). All Rights Reserved.
package jodd.typeconverter.impl;
import jodd.io.FileUtil;
import jodd.typeconverter.TypeConversionException;
import jodd.typeconverter.TypeConverter;
import jodd.util.ArraysUtil;
import java.io.File;
import java.io.IOException;
/**
* Converts given object into the <code>File</code>.
* If created, returned file is stored in the temporary folder.
* Conversion rules:
* <ul>
* <li><code>null</code> value is returned as <code>null</code></li>
* <li>object of destination type is simply casted</li>
* <li><code>byte[]</code> content is used for creating a file</li>
* <li><code>String</code> content is used for creating a file</li>
* </ul>
* <p>
* This converter is plugable and add-on file converters from
* other modules can be added.
*/
public class FileConverter implements TypeConverter<File> {
protected TypeConverter<File>[] addonFileConverters;
@SuppressWarnings("unchecked")
public void registerAddonConverter(TypeConverter<File> fileTypeConverter) {
if (addonFileConverters == null) {
addonFileConverters = new TypeConverter[0];
}
ArraysUtil.append(addonFileConverters, fileTypeConverter);
}
public File convert(Object value) {
if (value == null) {
return null;
}
if (value instanceof File) {
return (File) value;
}
if (addonFileConverters != null) {
for (TypeConverter<File> addonFileConverter : addonFileConverters) {
File file = addonFileConverter.convert(value);
if (file != null) {
return file;
}
}
}
/*
if (value instanceof FileUpload) {
FileUpload fileUpload = (FileUpload) value;
InputStream in = null;
try {
in = fileUpload.getFileInputStream();
File tempFile = FileUtil.createTempFile();
FileUtil.writeStream(tempFile, in);
return tempFile;
} catch (IOException ioex) {
throw new TypeConversionException(ioex);
} finally {
StreamUtil.close(in);
}
}
*/
Class type = value.getClass();
if (type == byte[].class) {
try {
File tempFile = FileUtil.createTempFile();
FileUtil.writeBytes(tempFile, (byte[])value);
return tempFile;
} catch (IOException ioex) {
throw new TypeConversionException(ioex);
}
}
if (type == String.class) {
try {
File tempFile = FileUtil.createTempFile();
FileUtil.writeString(tempFile, value.toString());
return tempFile;
} catch (IOException ioex) {
throw new TypeConversionException(ioex);
}
}
throw new TypeConversionException(value);
}
}