com.ait.lienzo.client.core.event.AbstractAccumulatingAttributesChangedBatcher.java Source code

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Here is the source code for com.ait.lienzo.client.core.event.AbstractAccumulatingAttributesChangedBatcher.java

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/*
   Copyright (c) 2014,2015 Ahome' Innovation Technologies. All rights reserved.
    
   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 com.ait.lienzo.client.core.event;

import com.ait.lienzo.client.core.types.NFastStringSet;
import com.google.gwt.event.shared.HandlerManager;

public abstract class AbstractAccumulatingAttributesChangedBatcher implements IAttributesChangedBatcher {
    private HandlerManager m_manager = null;

    private NFastStringSet m_changed = new NFastStringSet();

    protected AbstractAccumulatingAttributesChangedBatcher() {
    }

    @Override
    public final void bufferAttributeWithManager(final String name, final HandlerManager manager) {
        m_manager = manager;

        m_changed.add(name);

        tick();
    }

    protected final void tock() {
        if (false == m_changed.isEmpty()) {
            tick();
        }
    }

    protected final void dispatch() {
        if ((null != m_manager) && (false == m_changed.isEmpty())) {
            final NFastStringSet changed = new NFastStringSet(m_changed);

            m_changed = new NFastStringSet();

            final HandlerManager manager = m_manager;

            m_manager = null;

            manager.fireEvent(new AttributesChangedEvent(changed));
        }
    }

    protected abstract void tick();
}