net.coobird.thumbnailator.name.Rename Maven / Gradle / Ivy
package net.coobird.thumbnailator.name;
import net.coobird.thumbnailator.ThumbnailParameter;
/**
* This class is used to rename file names.
*
* @author coobird
*
*/
public abstract class Rename
{
/**
* A {@code Rename} which does not alter the given file name.
*
* Note: The {@link #apply(String, ThumbnailParameter)} method does not use
* the {@code param} parameter. A value of {@code null} for {@code param} is
* permitted.
*
*
Example
*
* - Before: {@code picture.jpg}
* - After: {@code picture.jpg}
*
*/
public static final Rename NO_CHANGE = new Rename() {
@Override
public String apply(String name, ThumbnailParameter param)
{
return name;
}
};
/**
* Appends {@code thumbnail.} to the beginning of the file name.
*
* Note: The {@link #apply(String, ThumbnailParameter)} method does not use
* the {@code param} parameter. A value of {@code null} for {@code param} is
* permitted.
*
*
Example
*
* - Before: {@code picture.jpg}
* - After: {@code thumbnail.picture.jpg}
*
*/
public static final Rename PREFIX_DOT_THUMBNAIL = new Rename() {
@Override
public String apply(String fileName, ThumbnailParameter param)
{
return appendPrefix(fileName, "thumbnail.");
}
};
/**
* Appends {@code thumbnail-} to the beginning of the file name.
*
* Note: The {@link #apply(String, ThumbnailParameter)} method does not use
* the {@code param} parameter. A value of {@code null} for {@code param} is
* permitted.
*
*
Example
*
* - Before: {@code picture.jpg}
* - After: {@code thumbnail-picture.jpg}
*
*
* @deprecated Please use the correctly spelled
* {@link Rename#PREFIX_HYPHEN_THUMBNAIL}. This constant
* will be removed in Thumbnailator 0.5.0.
*/
@Deprecated
public static final Rename PREFIX_HYPTHEN_THUMBNAIL = Rename.PREFIX_HYPHEN_THUMBNAIL;
/**
* Appends {@code thumbnail-} to the beginning of the file name.
*
* Note: The {@link #apply(String, ThumbnailParameter)} method does not use
* the {@code param} parameter. A value of {@code null} for {@code param} is
* permitted.
*
*
Example
*
* - Before: {@code picture.jpg}
* - After: {@code thumbnail-picture.jpg}
*
*/
public static final Rename PREFIX_HYPHEN_THUMBNAIL = new Rename() {
@Override
public String apply(String fileName, ThumbnailParameter param)
{
return appendPrefix(fileName, "thumbnail-");
}
};
/**
* Appends {@code .thumbnail} to the file name prior to the extension of
* the file.
*
* Note: The {@link #apply(String, ThumbnailParameter)} method does not use
* the {@code param} parameter. A value of {@code null} for {@code param} is
* permitted.
*
*
Example
*
* - Before: {@code picture.jpg}
* - After: {@code picture.thumbnail.jpg}
*
*/
public static final Rename SUFFIX_DOT_THUMBNAIL = new Rename() {
@Override
public String apply(String fileName, ThumbnailParameter param)
{
return appendSuffix(fileName, ".thumbnail");
}
};
/**
* Appends {@code -thumbnail} to the file name prior to the extension of
* the file.
*
* Note: The {@link #apply(String, ThumbnailParameter)} method does not use
* the {@code param} parameter. A value of {@code null} for {@code param} is
* permitted.
*
*
Example
*
* - Before: {@code picture.jpg}
* - After: {@code picture-thumbnail.jpg}
*
*
* @deprecated Please use the correctly spelled
* {@link Rename#SUFFIX_HYPHEN_THUMBNAIL}. This constant
* will be removed in Thumbnailator 0.5.0.
*/
@Deprecated
public static final Rename SUFFIX_HYPTHEN_THUMBNAIL = Rename.SUFFIX_HYPHEN_THUMBNAIL;
/**
* Appends {@code -thumbnail} to the file name prior to the extension of
* the file.
*
* Note: The {@link #apply(String, ThumbnailParameter)} method does not use
* the {@code param} parameter. A value of {@code null} for {@code param} is
* permitted.
*
*
Example
*
* - Before: {@code picture.jpg}
* - After: {@code picture-thumbnail.jpg}
*
*/
public static final Rename SUFFIX_HYPHEN_THUMBNAIL = new Rename() {
@Override
public String apply(String fileName, ThumbnailParameter param)
{
return appendSuffix(fileName, "-thumbnail");
}
};
/**
* The default constructor is intended only to be called implicitly
* by the classes implementing the functionality of the {@link Rename}
* class.
*/
protected Rename() {}
/**
* Applies the function performed by this {@code Rename} on the
* specified name and thumbnail creation parameters.
*
* @param name Name to apply the function on.
* The file name should not include the directory
* in which the file resides in.
* @param param Parameters used to create the thumbnail.
* @return The name after the function has been applied.
*/
public abstract String apply(String name, ThumbnailParameter param);
/**
* Appends a suffix to a filename.
*
* @param fileName File name to add a suffix on.
* @param suffix The suffix to add.
* @return File name with specified suffixed affixed.
*/
protected String appendSuffix(String fileName, String suffix)
{
String newFileName = "";
int indexOfDot = fileName.lastIndexOf('.');
if (indexOfDot != -1)
{
newFileName = fileName.substring(0, indexOfDot);
newFileName += suffix;
newFileName += fileName.substring(indexOfDot);
}
else
{
newFileName = fileName + suffix;
}
return newFileName;
}
/**
* Appends a prefix to a filename.
*
* @param fileName File name to add a prefix on.
* @param prefix The prefix to add.
* @return File name with the specified prefix affixed.
*/
protected String appendPrefix(String fileName, String prefix)
{
return prefix + fileName;
}
}