pdactionfactory.java

非常有用的操作pdf文件的java源码

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 * Copyright (c) 2004, www.pdfbox.org
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 *    this list of conditions and the following disclaimer.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package org.pdfbox.pdmodel.interactive.action;

import org.pdfbox.cos.COSDictionary;

import org.pdfbox.pdmodel.interactive.action.type.PDAction;
import org.pdfbox.pdmodel.interactive.action.type.PDActionGoTo;
import org.pdfbox.pdmodel.interactive.action.type.PDActionJavaScript;
import org.pdfbox.pdmodel.interactive.action.type.PDActionLaunch;
import org.pdfbox.pdmodel.interactive.action.type.PDActionRemoteGoTo;
import org.pdfbox.pdmodel.interactive.action.type.PDActionURI;

/**
 * This class will take a dictionary and determine which type of action to create.
 *
 * @author <a href="mailto:[e-mail]">Ben Litchfield</a>
 * @version $Revision: 1.5 $
 */
public class PDActionFactory
{
    /**
     * Utility Class.
     */
    private PDActionFactory()
    {
        //utility class
    }

    /**
     * This will create the correct type of action based on the type specified
     * in the dictionary.
     *
     * @param action An action dictionary.
     *
     * @return An action of the correct type.
     */
    public static PDAction createAction( COSDictionary action )
    {
        PDAction retval = null;
        if( action != null )
        {
            String type = action.getNameAsString( "S" );
            if( PDActionJavaScript.SUB_TYPE.equals( type ) )
            {
                retval = new PDActionJavaScript( action );
            }
            else if( PDActionGoTo.SUB_TYPE.equals( type ) )
            {
                retval = new PDActionGoTo( action );
            }
            else if( PDActionLaunch.SUB_TYPE.equals( type ) )
            {
                retval = new PDActionLaunch( action );
            }
            else if( PDActionRemoteGoTo.SUB_TYPE.equals( type ) )
            {
                retval = new PDActionRemoteGoTo( action );
            }
            else if( PDActionURI.SUB_TYPE.equals( type ) )
            {
                retval = new PDActionURI( action );
            }
        }
        return retval;
    }

}