Java tutorial
/* * Created on 23/gen/2011 * Copyright 2010 by Andrea Vacondio (andrea.vacondio@gmail.com). * * Licensed 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.sejda.impl.itext.util; import java.util.Collections; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; import org.sejda.model.pdf.label.PdfLabelNumberingStyle; import org.sejda.model.pdf.label.PdfPageLabel; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.lowagie.text.pdf.PdfPageLabels; /** * Utility class to deal with page labels. * * @author Andrea Vacondio * */ public final class PageLabelUtils { private static final Logger LOG = LoggerFactory.getLogger(PageLabelUtils.class); private static final Map<PdfLabelNumberingStyle, Integer> PAGE_NUMBERS_STYLES; static { Map<PdfLabelNumberingStyle, Integer> pageNumberStyles = new HashMap<PdfLabelNumberingStyle, Integer>(); pageNumberStyles.put(PdfLabelNumberingStyle.ARABIC, PdfPageLabels.DECIMAL_ARABIC_NUMERALS); pageNumberStyles.put(PdfLabelNumberingStyle.EMPTY, PdfPageLabels.EMPTY); pageNumberStyles.put(PdfLabelNumberingStyle.LOWERCASE_LETTERS, PdfPageLabels.LOWERCASE_LETTERS); pageNumberStyles.put(PdfLabelNumberingStyle.LOWERCASE_ROMANS, PdfPageLabels.LOWERCASE_ROMAN_NUMERALS); pageNumberStyles.put(PdfLabelNumberingStyle.UPPERCASE_LETTERS, PdfPageLabels.UPPERCASE_LETTERS); pageNumberStyles.put(PdfLabelNumberingStyle.UPPERCASE_ROMANS, PdfPageLabels.UPPERCASE_ROMAN_NUMERALS); PAGE_NUMBERS_STYLES = Collections.unmodifiableMap(pageNumberStyles); } private PageLabelUtils() { // utility } /** * Maps a map of {@link PdfPageLabel} to a {@link com.lowagie.text.pdf.PdfPageLabels} instance that can be used as input for the PdfCopy. * * @param labels * @param totalPages * @return the resulting {@link PdfPageLabels} */ public static PdfPageLabels getLabels(Map<Integer, PdfPageLabel> labels, int totalPages) { PdfPageLabels retVal = new PdfPageLabels(); for (Entry<Integer, PdfPageLabel> entry : labels.entrySet()) { PdfPageLabel label; if (entry.getKey() <= totalPages) { label = entry.getValue(); retVal.addPageLabel(entry.getKey(), PAGE_NUMBERS_STYLES.get(label.getNumberingStyle()), label.getLabelPrefix(), label.getLogicalPageNumber()); } else { LOG.warn("Page number out of rage, {} will be ignored.", entry.getValue()); } } return retVal; } }