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package bjc.utils.components;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
import bjc.utils.funcdata.FunctionalList;
/**
* A component repository that loads its components from files in a
* directory
*
* @author ben
*
* @param <E>
* The type of component being read in
*/
public class FileComponentRepository<E extends IDescribedComponent>
implements IComponentRepository<E> {
/**
* The internal storage of components
*/
private Map<String, E> comps;
/**
* The path that all the components came from
*/
private String sourcePath;
/**
* Create a new component repository sourcing components from files in
* a directory
*
* @param dir
* The directory to read component files from
* @param reader
* The function to use to convert files to components
*/
public FileComponentRepository(File dir,
Function<InputStream, E> reader) {
comps = new HashMap<>();
sourcePath = dir.getAbsolutePath();
for (File fle : dir.listFiles()) {
if (fle.isDirectory()) {
// Do nothing with directories. They probably contain
// support files for components
} else {
try {
E comp = reader.apply(new FileInputStream(fle));
comps.put(comp.getName(), comp);
} catch (FileNotFoundException fnfx) {
System.err.println("Couldn't read component file: "
+ fle.getAbsolutePath() + "\nReason: "
+ fnfx.getMessage());
fnfx.printStackTrace(System.err);
}
}
}
}
@Override
public FunctionalList<E> getComponentList() {
FunctionalList<E> ret = new FunctionalList<>();
comps.forEach((name, comp) -> {
ret.add(comp);
});
return ret;
}
@Override
public Map<String, E> getComponents() {
return comps;
}
@Override
public String getSource() {
return "Read from directory " + sourcePath + ".";
}
}
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