/*
* Copyright 2013 eXo Platform SAS
*
* 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 juzu.impl.common;
import juzu.request.RequestParameter;
import java.util.Iterator;
import java.util.NoSuchElementException;
/** @author Julien Viet */
public abstract class AbstractParameterParser implements Iterable<RequestParameter> {
/** . */
private final CharSequence s;
/** . */
private final int from;
/** . */
private final int to;
public AbstractParameterParser(CharSequence s, int from, int to) {
this.s = s;
this.from = from;
this.to = to;
}
public Iterator<RequestParameter> iterator() {
return new Iterator<RequestParameter>() {
int current = from;
RequestParameter next = null;
private RequestParameter parse(int from, int to) {
int pos = Tools.indexOf(s, '=', from, to);
if (pos == -1) {
String name = s.subSequence(from, to).toString();
String decodeName = safeDecodeName(name);
if (decodeName != null) {
return RequestParameter.create(decodeName, "");
}
} else if (pos > 0) {
String value = s.subSequence(pos + 1, to).toString();
String decodedValue = safeDecodeValue(value);
if (decodedValue != null) {
String name = s.subSequence(from, pos).toString();
String decodedName = safeDecodeName(name);
if (decodedName != null) {
return RequestParameter.create(decodedName, value, decodedValue);
}
}
}
return null;
}
public boolean hasNext() {
while (next == null && current < to) {
int pos = Tools.indexOf(s, '&', current, to);
if (pos == 0) {
throw new UnsupportedOperationException("todo");
} else if (pos == -1) {
next = parse(current, to);
current = to;
} else {
next = parse(current, pos);
current = pos + 1;
}
}
return next != null;
}
public RequestParameter next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
RequestParameter tmp = next;
next = null;
return tmp;
}
public void remove() {
throw new UnsupportedOperationException();
}
};
}
protected abstract String safeDecodeName(String s);
protected abstract String safeDecodeValue(String s);
}