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/* Copyright (c) 2016, Isode Limited, London, England.
* All rights reserved.
*
* Acquisition and use of this software and related materials for any
* purpose requires a written license agreement from Isode Limited,
* or a written license from an organisation licensed by Isode Limited
* to grant such a license.
*
*/
package com.isode.stroke.parser.payloadparsers;
import com.isode.stroke.elements.AbstractBlockPayload;
import com.isode.stroke.elements.BlockListPayload;
import com.isode.stroke.elements.BlockPayload;
import com.isode.stroke.elements.Payload;
import com.isode.stroke.elements.UnblockPayload;
import com.isode.stroke.jid.JID;
import com.isode.stroke.parser.AttributeMap;
import com.isode.stroke.parser.GenericPayloadParser;
/**
* Base class for parser that pass Block pay loads such as
* {@link BlockPayload}, {@link BlockListPayload} and {@link UnblockPayload}
* @param <T> Type of {@link Payload} that will be parsed.
*/
public abstract class BlockParser<T extends AbstractBlockPayload> extends GenericPayloadParser<T> {
/*
* Note this is slightly different to Swiften code as templates in C++ work
* different to Java Generics. In Swiften there exits a BlockParser template
* for which instances can be created of type <BlockPayload>, <BlockListPayload> and
* <UnblockPayload>. In Java as we need to pass an instance of the class to the constructor
* (which we can't do with generics) we need to create specific sub types for each of
* the different Block payloads.
*/
private int level = 0;
/**
* Constructor
* @param payload New instance of T to create the parsed
* version from.
*/
protected BlockParser(T payload) {
super(payload);
}
@Override
public void handleStartElement(String element, String ns,
AttributeMap attributes) {
if (level == 1 && "item".equals(element)) {
JID jid = new JID(attributes.getAttribute("jid"));
if (jid.isValid()) {
AbstractBlockPayload payload = getPayloadInternal();
payload.addItem(jid);
}
}
++level;
}
@Override
public void handleEndElement(String element, String ns) {
--level;
}
@Override
public void handleCharacterData(String data) {
// Empty method
}
}
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