org.xnio.SequenceOption Maven / Gradle / Ivy
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* Copyright 2011 Red Hat, Inc. and/or its affiliates, and individual
* contributors as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.xnio;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import static org.xnio._private.Messages.msg;
/**
* @author David M. Lloyd
*/
final class SequenceOption extends Option> {
private static final long serialVersionUID = -4328676629293125136L;
private final transient Class elementType;
private final transient ValueParser parser;
SequenceOption(final Class declClass, final String name, final Class elementType) {
super(declClass, name);
if (elementType == null) {
throw msg.nullParameter("elementType");
}
this.elementType = elementType;
parser = Option.getParser(elementType);
}
public Sequence cast(final Object o) {
if (o == null) {
return null;
} else if (o instanceof Sequence) {
return ((Sequence)o).cast(elementType);
} else if (o instanceof Object[]){
return Sequence.of((Object[])o).cast(elementType);
} else if (o instanceof Collection) {
return Sequence.of((Collection)o).cast(elementType);
} else {
throw new ClassCastException("Not a sequence");
}
}
public Sequence parseValue(final String string, final ClassLoader classLoader) throws IllegalArgumentException {
final List list = new ArrayList();
if (string.isEmpty()) {
return Sequence.empty();
}
for (String value : string.split(",")) {
list.add(parser.parseValue(value, classLoader));
}
return Sequence.of(list);
}
}