fujaba/NetworkParser

package de.uniks.networkparser.ext.petaf.messages;

/*
The MIT License

Copyright (c) 2010-2016 Stefan Lindel https://www.github.com/fujaba/NetworkParser/

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
import de.uniks.networkparser.Filter;
import de.uniks.networkparser.IdMap;
import de.uniks.networkparser.SimpleEvent;
import de.uniks.networkparser.UpdateCondition;
import de.uniks.networkparser.ext.petaf.ReceivingTimerTask;
import de.uniks.networkparser.ext.petaf.Space;
import de.uniks.networkparser.ext.petaf.proxy.NodeProxyModel;
import de.uniks.networkparser.interfaces.BaseItem;
import de.uniks.networkparser.interfaces.SendableEntityCreator;

public class ChangeMessage extends ReceivingTimerTask {
    public static final String PROPERTY_TYPE = "change";
    public static final String PROPERTY_ID = "changeid";
    public static final String PROPERTY_PROPERTY = "property";
    public static final String PROPERTY_OLD = "old";
    public static final String PROPERTY_NEW = "new";
    public static final String PROPERTY_CHANGECLASS = "changeclass";

    private Object entity;
    private Filter filter;
    private String property;
    private String id;
    private Object oldValue;
    private Object newValue;

    public ChangeMessage() {
        ChangeMessage.props.add(PROPERTY_ID, PROPERTY_PROPERTY, PROPERTY_OLD, PROPERTY_NEW, PROPERTY_CHANGECLASS);
    }

    public ChangeMessage withEntity(Object value) {
        this.entity = value;
        return this;
    }

    public ChangeMessage withFilter(Filter filter) {
        this.filter = filter;
        return this;
    }

    public ChangeMessage withValue(String property, Object oldValue, Object newValue) {
        this.property = property;
        this.oldValue = oldValue;
        this.newValue = newValue;
        return this;
    }

    public ChangeMessage withValue(SimpleEvent event) {
        this.property = event.getPropertyName();
        this.oldValue = event.getOldValue();
        this.newValue = event.getNewValue();
        this.entity = event.getModelValue();
        return this;
    }

    @Override
    public BaseItem getMessage() {
        if (msg == null && space != null) {
            if (property == null) {
                msg = space.encode(entity, filter);
            }
        }
        return super.getMessage();
    }

    public String getId() {
        return id;
    }

    @Override
    public boolean runTask() {
        if (this.id == null || this.space == null) {
            return false;
        }
        IdMap map = this.space.getMap();
        Object element = map.getObject(this.id);
        SendableEntityCreator creator = null;
        if (element == null) {
            if (this.entity instanceof String) {
                String className = (String) this.entity;
                creator = map.getCreator(className, true);
                element = creator.getSendableInstance(true);
                map.put(this.id, element, false);
                space.createModel(element);
            }
        } else {
            creator = map.getCreatorClass(element);
        }
        if (element != null && creator != null) {
            Object currentValue = creator.getValue(element, this.property);
            if ((currentValue == null && this.oldValue == null)
                    || (currentValue != null && currentValue.equals(this.oldValue))) {
                UpdateCondition changeMessage = UpdateCondition.createUpdateCondition();
                changeMessage.withAcumulateTarget(element, creator, this.property);
                space.suspendNotification(changeMessage);
                creator.setValue(element, property, this.newValue, SendableEntityCreator.UPDATE);
                space.resetNotification();
            }
        }
        return super.runTask();
    }

    @Override
    public Object getValue(Object entity, String attribute) {
        if (attribute == null || entity instanceof ChangeMessage == false) {
            return false;
        }
        ChangeMessage message = (ChangeMessage) entity;
        if (PROPERTY_OLD.equalsIgnoreCase(attribute)) {
            return message.oldValue;
        }
        if (PROPERTY_NEW.equalsIgnoreCase(attribute)) {
            return message.newValue;
        }
        if (PROPERTY_PROPERTY.equalsIgnoreCase(attribute)) {
            return message.property;
        }
        if (PROPERTY_CHANGECLASS.equalsIgnoreCase(attribute)) {
            if (message.entity == null) {
                return null;
            }
            return message.entity.getClass().getName();
        }
        if (entity != null && PROPERTY_ID.equalsIgnoreCase(attribute)) {
            Space space = message.getSpace();
            if (space != null) {
                return space.getId(message.entity);
            }
        }
        return super.getValue(entity, attribute);
    }

    @Override
    public boolean setValue(Object entity, String attribute, Object value, String type) {
        if (attribute == null || entity instanceof ChangeMessage == false) {
            return false;
        }
        ChangeMessage message = (ChangeMessage) entity;
        if (PROPERTY_OLD.equalsIgnoreCase(attribute)) {
            message.oldValue = value;
            return true;
        }
        if (PROPERTY_NEW.equalsIgnoreCase(attribute)) {
            message.newValue = value;
            return true;
        }
        if (PROPERTY_PROPERTY.equalsIgnoreCase(attribute)) {
            message.property = (String) value;
            return true;
        }
        if (PROPERTY_ID.equalsIgnoreCase(attribute)) {
            message.id = (String) value;
            return true;
        }
        if (PROPERTY_CHANGECLASS.equalsIgnoreCase(attribute)) {
            message.entity = (String) value;
            return true;
        }
        return super.setValue(entity, attribute, value, type);
    }

    protected void initialize(NodeProxyModel modell) {
        if (modell == null) {
            return;
        }
        if (this.space == null) {
            this.space = modell.getSpace();
        }
        if (this.entity == null) {
            this.entity = modell.getModel();
        }
    }

    public Object getEntity() {
        return entity;
    }

    @Override
    public ChangeMessage getSendableInstance(boolean prototyp) {
        return new ChangeMessage().withFilter(filter);
    }

    @Override
    public String getType() {
        return PROPERTY_TYPE;
    }

    public Object getNewValue() {
        return newValue;
    }

    public String getProperty() {
        return property;
    }
}