aQute.lib.json.CollectionHandler Maven / Gradle / Ivy
package aQute.lib.json;
import java.io.IOException;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Map;
import java.util.TreeSet;
import java.util.Vector;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CopyOnWriteArraySet;
public class CollectionHandler extends Handler {
Class rawClass;
Type componentType;
CollectionHandler(Class rawClass, Type componentType) {
this.componentType = componentType;
if (rawClass.isInterface()) {
if (rawClass.isAssignableFrom(ArrayList.class))
rawClass = ArrayList.class;
else if (rawClass.isAssignableFrom(LinkedList.class))
rawClass = LinkedList.class;
else if (rawClass.isAssignableFrom(HashSet.class))
rawClass = HashSet.class;
else if (rawClass.isAssignableFrom(TreeSet.class))
rawClass = TreeSet.class;
else if (rawClass.isAssignableFrom(Vector.class))
rawClass = Vector.class;
else if (rawClass.isAssignableFrom(ConcurrentLinkedQueue.class))
rawClass = ConcurrentLinkedQueue.class;
else if (rawClass.isAssignableFrom(CopyOnWriteArrayList.class))
rawClass = CopyOnWriteArrayList.class;
else if (rawClass.isAssignableFrom(CopyOnWriteArraySet.class))
rawClass = CopyOnWriteArraySet.class;
else
throw new IllegalArgumentException("Unknown interface type for collection: " + rawClass);
}
this.rawClass = rawClass;
}
@Override
public void encode(Encoder app, Object object, Map visited) throws IOException, Exception {
Iterable collection = (Iterable) object;
app.append("[");
app.indent();
String del = "";
int index = 0;
for (Object o : collection)
try {
app.append(del);
if (!del.isEmpty()) {
app.linebreak();
}
app.encode(o, componentType, visited);
del = ",";
index++;
} catch (Exception e) {
throw new IllegalArgumentException("[" + index + "]", e);
}
app.undent();
app.append("]");
}
@Override
public Object decodeArray(Decoder r) throws Exception {
@SuppressWarnings("unchecked")
Collection