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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* 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.pdmodel.interactive.annotation;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.common.COSObjectable;
/**
* An appearance dictionary specifying how the annotation shall be presented visually on the page.
*
* @author Ben Litchfield
*/
public class PDAppearanceDictionary implements COSObjectable
{
private final COSDictionary dictionary;
/**
* Constructor for embedding.
*/
public PDAppearanceDictionary()
{
dictionary = new COSDictionary();
// the N entry is required.
dictionary.setItem(COSName.N, new COSDictionary());
}
/**
* Constructor for reading.
*
* @param dictionary The annotations dictionary.
*/
public PDAppearanceDictionary(COSDictionary dictionary)
{
this.dictionary = dictionary;
}
@Override
public COSDictionary getCOSObject()
{
return dictionary;
}
/**
* This will return a list of appearances. In the case where there is only one appearance the map will contain one
* entry whose key is the string "default".
*
* @return A list of key(java.lang.String) value(PDAppearanceStream) pairs
*/
public PDAppearanceEntry getNormalAppearance()
{
COSBase entry = dictionary.getDictionaryObject(COSName.N);
if (entry == null)
{
return null;
}
else
{
return new PDAppearanceEntry(entry);
}
}
/**
* This will set a list of appearances. If you would like to set the single appearance then you should use the key
* "default", and when the PDF is written back to the filesystem then there will only be one stream.
*
* @param entry appearance stream or subdictionary
*/
public void setNormalAppearance(PDAppearanceEntry entry)
{
dictionary.setItem(COSName.N, entry);
}
/**
* This will set the normal appearance when there is only one appearance to be shown.
*
* @param ap The appearance stream to show.
*/
public void setNormalAppearance(PDAppearanceStream ap)
{
dictionary.setItem(COSName.N, ap);
}
/**
* This will return a list of appearances. In the case where there is only one appearance the map will contain one
* entry whose key is the string "default". If there is no rollover appearance then the normal appearance will be
* returned. Which means that this method will never return null.
*
* @return A list of key(java.lang.String) value(PDAppearanceStream) pairs
*/
public PDAppearanceEntry getRolloverAppearance()
{
COSBase entry = dictionary.getDictionaryObject(COSName.R);
if (entry == null)
{
return getNormalAppearance();
}
else
{
return new PDAppearanceEntry(entry);
}
}
/**
* This will set a list of appearances. If you would like to set the single appearance then you should use the key
* "default", and when the PDF is written back to the filesystem then there will only be one stream.
*
* @param entry appearance stream or subdictionary
*/
public void setRolloverAppearance(PDAppearanceEntry entry)
{
dictionary.setItem(COSName.R, entry);
}
/**
* This will set the rollover appearance when there is rollover appearance to be shown.
*
* @param ap The appearance stream to show.
*/
public void setRolloverAppearance(PDAppearanceStream ap)
{
dictionary.setItem(COSName.R, ap);
}
/**
* This will return a list of appearances. In the case where there is only one appearance the map will contain one
* entry whose key is the string "default". If there is no rollover appearance then the normal appearance will be
* returned. Which means that this method will never return null.
*
* @return A list of key(java.lang.String) value(PDAppearanceStream) pairs
*/
public PDAppearanceEntry getDownAppearance()
{
COSBase entry = dictionary.getDictionaryObject(COSName.D);
if (entry == null)
{
return getNormalAppearance();
}
else
{
return new PDAppearanceEntry(entry);
}
}
/**
* This will set a list of appearances. If you would like to set the single appearance then you should use the key
* "default", and when the PDF is written back to the filesystem then there will only be one stream.
*
* @param entry appearance stream or subdictionary
*/
public void setDownAppearance(PDAppearanceEntry entry)
{
dictionary.setItem(COSName.D, entry);
}
/**
* This will set the down appearance when there is down appearance to be shown.
*
* @param ap The appearance stream to show.
*/
public void setDownAppearance(PDAppearanceStream ap)
{
dictionary.setItem(COSName.D, ap);
}
}