Application: gvSIG desktop » Library: org.gvsig.tools

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

package org.gvsig.tools.task.impl;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.observer.ObservableHelper;

import org.gvsig.tools.observer.Observer;

import org.gvsig.tools.task.SimpleTaskStatus;

import org.gvsig.tools.task.TaskStatusManager;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * @author gvSIG Team

 * @version $Id$

 *

 */

public class BaseTaskStatus implements SimpleTaskStatus {

    private static final Logger LOG = LoggerFactory

        .getLogger(BaseTaskStatus.class);

    protected class SubtaskValues {

                long minValue = 0;

        long maxValue = 0;

        long curValue = 0;

        String message = null;

        public Object clone() {

                SubtaskValues other = new SubtaskValues();

                other.curValue = this.curValue;

                other.maxValue = this.maxValue;

                other.minValue = this.minValue;

                other.message = this.message;

                return other;

        }

    }

    protected Date lastModification = null;

    protected SubtaskValues values;

    protected List subtaskStack = null ;

    protected String title = null;

    protected String code = null;

    protected boolean isCancelled = false;

    protected boolean isAbortedByError = false;

    protected boolean isRunning = true;

    protected TaskStatusManager manager = null;

        protected boolean isCancellable;

        protected boolean isCancellationRequested;

        protected ObservableHelper observers = null;

        protected boolean autoremove;

    private long startMillis;

    public BaseTaskStatus(String title) {

            this.manager =  ToolsLocator.getTaskStatusManager();

            this.autoremove = true;

        this.title = title;

        this.values = new SubtaskValues();

        this.isCancelled = false;

        this.isAbortedByError = false;

        this.isRunning = true;

        this.isCancellable = false;

        this.isCancellationRequested = false;

        this.code = this.manager.getNewCode();

        this.observers = new ObservableHelper();

        this.touch();

    }

    public BaseTaskStatus(String tittle, long minValue, long maxValue) {

            this(tittle);

        this.values.minValue = minValue;

        this.values.maxValue = maxValue;

    }

    public void setRangeOfValues(long min, long max) {

        this.values.minValue = min;

        this.values.maxValue = max;

    }

    protected void touch() {

            Date now = new Date(); 

            if( this.lastModification!=null && (now.getTime() - this.lastModification.getTime()) > 2000 ) {

                    this.values.message = null;

            }

        this.lastModification = now;

        this.manager.update(this);

        this.observers.notifyObservers(this, null);

    }

    public Date getLastModification() {

            return this.lastModification;

    }

    public void message(String message) {

            this.values.message = message;

            this.touch();

    }

    public String getTitle() {

        return this.title;

    }

    public String getCode() {

        return this.code;

    }

    public void setCurValue(long value) {

        this.values.curValue = value;

        this.touch();

    }

    public int getCompleted() {

        if( !this.isRunning ) {

            return 100;

        }

        if( this.values.maxValue == this.values.minValue ) {

                // No se puede calcular ya que no se ha indicado el numero de elementos

                // sobre los que se esta trabajando, asi que devoobemos el 100%.

                return 100;

        }

        try {

            return (int) (((this.values.curValue-this.values.minValue)*100)/(this.values.maxValue-this.values.minValue));

        } catch( Exception e) {

            return 100;

        }

    }

    public String getLabel() {

            String progress;

        if( this.values.maxValue == this.values.minValue ) {

                // No se puede calcular ya que no se ha indicado el numero de elementos

                // sobre los que se esta trabajando.

                if( this.values.curValue > 0 ) {

                        progress = " (" + this.values.curValue + ")";

                } else {

                        progress = "";

                }

        } else {

            progress = " (" + (this.values.curValue-this.values.minValue) + " / " + (this.values.maxValue-this.values.minValue) + ")" ;

        }

            if( this.values.message == null ) {

            return progress;

            } else {

            return this.values.message + progress;

            }

    }

    public void terminate() {

            if( !isRunning ) {

                    return;

            }

        this.isRunning = false;

        if (LOG.isDebugEnabled()) {

            long endMillis = System.currentTimeMillis();

            LOG.debug("Terminated status {} execution in {} ms", getTitle(),

                new Long(endMillis - startMillis));

        }

        this.touch();

    }

    public void cancel() {

            if( !isRunning ) {

                    return;

            }

        this.isCancelled = true;

        this.isRunning = false;

        this.touch();

    }

    public void abort() {

            if( !isRunning ) {

                    return;

            }

        this.isAbortedByError = true;

        this.isRunning = false;

        this.touch();

    }

    public boolean isCancelled() {

        return this.isCancelled;

    }

    public boolean isAborted() {

        return this.isAbortedByError;

    }

    public boolean isRunning() {

        return this.isRunning;

    }

        public TaskStatusManager getManager() {

                return this.manager;

        }

        public boolean isIndeterminate() {

                return this.values.minValue == this.values.maxValue;

        }

        public void add() {

                this.manager.add(this);

        if (LOG.isDebugEnabled()) {

            startMillis = System.currentTimeMillis();

        }

        }

        public void remove() {

                this.manager.remove(this);

        }

        public boolean isCancellable() {

                return this.isCancellable;

        }

        public void setCancellable(boolean cancellable) {

                this.isCancellable = cancellable;

        }

        synchronized public boolean isCancellationRequested() {

                return this.isCancellationRequested;

        }

        synchronized public void cancelRequest() {

                this.isCancellationRequested = true;

        }

        synchronized public void addObserver(Observer o) {

                this.observers.addObserver(o);

        }

        synchronized public void deleteObserver(Observer o) {

                this.observers.deleteObserver(o);

        }

        synchronized public void deleteObservers() {

                this.observers.deleteObservers();

        }

        public void setTittle(String tittle) {

        setTitle(tittle);

    }

    public void setTitle(String title) {

        if (this.title != null) {

            return;

        }

        this.title = title;

    }

        public void setAutoremove(boolean autoremove) {

                this.autoremove = autoremove;

        }

        public boolean getAutoRemove() {

                return this.autoremove;

        }

        public void push() {

                if( this.subtaskStack == null ) {

                        this.subtaskStack = new ArrayList();

                }

                this.subtaskStack.add(0, this.values);

                this.values = (SubtaskValues) this.values.clone();

        }

        public void pop() {

                if( this.subtaskStack == null && this.subtaskStack.isEmpty() ) {

                        return;

                }

                this.values = (SubtaskValues) this.subtaskStack.get(0);

                this.subtaskStack.remove(0);

                touch();

        }

        public void setIndeterminate() {

                this.values.maxValue = 0;

                this.values.minValue = 0;

                this.values.curValue = 0;

        }

}