/*****************************************************************************
*
* 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.process.reflect;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_COMPOSITE;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_MMTYPE;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_TRUETYPE;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_TYPE0;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_TYPE0C;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_TYPE1;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_TYPE1C;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_TYPE2;
import static org.apache.pdfbox.preflight.PreflightConstants.FONT_DICTIONARY_VALUE_TYPE3;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDSimpleFont;
import org.apache.pdfbox.pdmodel.font.PDTrueTypeFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.font.PDType3Font;
import org.apache.pdfbox.preflight.PreflightConstants;
import org.apache.pdfbox.preflight.PreflightContext;
import org.apache.pdfbox.preflight.PreflightPath;
import org.apache.pdfbox.preflight.exception.ValidationException;
import org.apache.pdfbox.preflight.font.FontValidator;
import org.apache.pdfbox.preflight.font.TrueTypeFontValidator;
import org.apache.pdfbox.preflight.font.Type0FontValidator;
import org.apache.pdfbox.preflight.font.Type1FontValidator;
import org.apache.pdfbox.preflight.font.Type3FontValidator;
import org.apache.pdfbox.preflight.font.container.FontContainer;
import org.apache.pdfbox.preflight.process.AbstractProcess;
import org.apache.pdfbox.preflight.ValidationResult.ValidationError;
public class FontValidationProcess extends AbstractProcess
{
public void validate(PreflightContext context) throws ValidationException
{
PreflightPath vPath = context.getValidationPath();
if (vPath.isEmpty()) {
return;
}
else if (!vPath.isExpectedType(PDFont.class))
{
context.addValidationError(new ValidationError(PreflightConstants.ERROR_FONTS_INVALID_DATA, "Font validation process needs at least one PDFont object"));
}
else
{
PDFont font = (PDFont) vPath.peek();
FontContainer fontContainer = context.getFontContainer(font.getCOSObject());
if (fontContainer == null)
{ // if fontContainer isn't null the font is already checked
FontValidator<? extends FontContainer> validator = getFontValidator(context, font);
if (validator != null) validator.validate();
}
}
}
/**
* Create the right "Validator" object for the given font type
*
* @param context the preflight context.
* @param font the font object.
* @return the font validator instance for the font type.
*/
protected FontValidator<? extends FontContainer> getFontValidator(PreflightContext context, PDFont font)
{
String subtype = font.getSubType();
if (FONT_DICTIONARY_VALUE_TRUETYPE.equals(subtype))
{
return new TrueTypeFontValidator(context, (PDTrueTypeFont)font);
}
else if (FONT_DICTIONARY_VALUE_MMTYPE.equals(subtype) || FONT_DICTIONARY_VALUE_TYPE1.equals(subtype))
{
return new Type1FontValidator(context, (PDSimpleFont)font);
}
else if (FONT_DICTIONARY_VALUE_TYPE3.equals(subtype))
{
return new Type3FontValidator(context, (PDType3Font)font);
}
else if (FONT_DICTIONARY_VALUE_COMPOSITE.equals(subtype))
{
return new Type0FontValidator(context, font);
}
else if (FONT_DICTIONARY_VALUE_TYPE2.equals(subtype) || FONT_DICTIONARY_VALUE_TYPE1C.equals(subtype)
|| FONT_DICTIONARY_VALUE_TYPE0C.equals(subtype) || FONT_DICTIONARY_VALUE_TYPE0.equals(subtype))
{
// ---- Font managed by a Composite font.
// this dictionary will be checked by a CompositeFontValidator
return null;
}
else
{
context.addValidationError(new ValidationError(PreflightConstants.ERROR_FONTS_UNKNOWN_FONT_TYPE, "Unknown font type : " + subtype));
return null;
}
}
}