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package com.sun.jersey.server.impl.model.parameter.multivalued;
import com.sun.jersey.spi.StringReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
import javax.ws.rs.core.MultivaluedMap;
/**
*
* @author Paul.Sandoz@Sun.Com
*/
abstract class CollectionStringReaderExtractor<V extends Collection>
extends AbstractStringReaderExtractor {
protected CollectionStringReaderExtractor(StringReader sr, String parameter, String defaultStringValue) {
super(sr, parameter, defaultStringValue);
}
public Object extract(MultivaluedMap<String, String> parameters) {
final List<String> stringList = parameters.get(parameter);
if (stringList != null) {
final V valueList = getInstance();
for (String v : stringList) {
valueList.add((v.length() == 0) ? null : sr.fromString(v));
}
return valueList;
} else if (defaultStringValue != null) {
final V valueList = getInstance();
valueList.add(sr.fromString(defaultStringValue));
return valueList;
} else {
return getInstance();
}
}
protected abstract V getInstance();
private static final class ListValueOf extends CollectionStringReaderExtractor<List> {
ListValueOf(StringReader sr, String parameter, String defaultValueString) {
super(sr, parameter, defaultValueString);
}
protected List getInstance() {
return new ArrayList();
}
}
private static final class SetValueOf extends CollectionStringReaderExtractor<Set> {
SetValueOf(StringReader sr, String parameter, String defaultValueString) {
super(sr, parameter, defaultValueString);
}
protected Set getInstance() {
return new HashSet();
}
}
private static final class SortedSetValueOf extends CollectionStringReaderExtractor<SortedSet> {
SortedSetValueOf(StringReader sr, String parameter, String defaultValueString) {
super(sr, parameter, defaultValueString);
}
protected SortedSet getInstance() {
return new TreeSet();
}
}
static MultivaluedParameterExtractor getInstance(Class c,
StringReader sr, String parameter, String defaultValueString) {
if (List.class == c) {
return new ListValueOf(sr, parameter, defaultValueString);
} else if (Set.class == c) {
return new SetValueOf(sr, parameter, defaultValueString);
} else if (SortedSet.class == c) {
return new SortedSetValueOf(sr, parameter, defaultValueString);
} else {
throw new RuntimeException();
}
}
}