/*****************************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.pdfbox.preflight.action;

import static org.apache.pdfbox.preflight.PreflightConstants.ERROR_ACTION_INVALID_TYPE;
import static org.apache.pdfbox.preflight.PreflightConstants.ERROR_ACTION_MISING_KEY;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSDocument;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSObject;
import org.apache.pdfbox.preflight.PreflightContext;
import org.apache.pdfbox.preflight.ValidationResult.ValidationError;
import org.apache.pdfbox.preflight.utils.COSUtils;

/**
 * ActionManager for the GoTo action GoToAction is valid if the D entry is present.
 */
public class GoToAction extends AbstractActionManager
{

    /**
     * 
     * @param amFact Instance of ActionManagerFactory used to create ActionManager to check Next actions.
     * @param adict the COSDictionary of the action wrapped by this class.
     * @param ctx the preflight context.
     * @param aaKey the name of the key which identifies the action in an additional action dictionary.
     */
    public GoToAction(ActionManagerFactory amFact, COSDictionary adict, PreflightContext ctx, String aaKey)
    {
        super(amFact, adict, ctx, aaKey);
    }

    /*
     * (non-Javadoc)
     * 
     * @see net.awl.edoc.pdfa.validation.actions.AbstractActionManager#valid(java.util .List)
     */
    @Override
    protected boolean innerValid()
    {
        COSBase d = this.actionDictionnary.getItem(COSName.D);

        // ---- D entry is mandatory
        if (d == null)
        {
            context.addValidationError(new ValidationError(ERROR_ACTION_MISING_KEY,
                    "D entry is mandatory for the GoToActions"));
            return false;
        }

        COSDocument cosDocument = this.context.getDocument().getDocument();
        if (!(d instanceof COSName || COSUtils.isString(d, cosDocument) || COSUtils.isArray(d, cosDocument)))
        {
            context.addValidationError(new ValidationError(ERROR_ACTION_INVALID_TYPE, "Type of D entry is invalid"));
            return false;
        }
        
        if (d instanceof COSArray)
        {
            COSArray ar = (COSArray) d;
            if (ar.size() < 2)
            {
                context.addValidationError(new ValidationError(ERROR_ACTION_INVALID_TYPE, 
                        "/D entry of type array must have at least 2 elements"));
                return false;
            }            
            if (!validateExplicitDestination(ar))
            {
                return false;
            }
        }

        return true;
    }

    protected boolean validateExplicitDestination(COSArray ar)
    {
        // "In each case, page is an indirect reference to a page object."
        if (ar.get(0) instanceof COSObject)
        {
            COSObject ob = (COSObject) ar.get(0);
            COSBase type = ob.getDictionaryObject(COSName.TYPE);
            if (COSName.PAGE.equals(type))
            {
                return true;
            }
        }
        context.addValidationError(new ValidationError(ERROR_ACTION_INVALID_TYPE,
                "First element in /D array entry of GoToAction must be an indirect reference to a dictionary of /Type /Page, but is "
                + ar.getName(0)));
        return false;
    }

}

@@ -1006,16 +1006,44 @@
 ction;%0A%0A
+import java.io.IOException;%0A
 import s
@@ -1449,16 +1449,107 @@
 Object;%0A
+import org.apache.pdfbox.pdmodel.interactive.documentnavigation.destination.PDDestination;%0A
 import o
@@ -4117,32 +4117,401 @@
 )%0A            %7B%0A
+                try%0A                %7B%0A                    PDDestination.create(ar);%0A                %7D%0A                catch (IOException e)%0A                %7B%0A                    context.addValidationError(new ValidationError(ERROR_ACTION_INVALID_TYPE,%0A                            e.getMessage(), e));%0A                    return false;%0A                %7D                %0A
                 

validate destination