/* * 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. */ /* $Id$ */ package org.apache.fop.pdf; import org.apache.fop.util.DecimalFormatCache; /** * This class represents a simple number object. It also contains contains some * utility methods for outputting numbers to PDF. */ public class PDFNumber extends PDFObject { private Number number; /** * Returns the number. * @return the number */ public Number getNumber() { return this.number; } /** * Sets the number. * @param number the number */ public void setNumber(Number number) { this.number = number; } /** * Output a Double value to a string suitable for PDF. * * @param doubleDown the Double value * @return the value as a string */ public static String doubleOut(Double doubleDown) { return doubleOut(doubleDown.doubleValue()); } /** * Output a double value to a string suitable for PDF (6 decimal digits). * * @param doubleDown the double value * @return the value as a string */ public static String doubleOut(double doubleDown) { return doubleOut(doubleDown, 6); } /** * Output a double value to a string suitable for PDF. * In this method it is possible to set the maximum * number of decimal places to output. * * @param doubleDown the Double value * @param dec the number of decimal places to output * @return the value as a string */ public static String doubleOut(double doubleDown, int dec) { return DecimalFormatCache.getDecimalFormat(dec).format(doubleDown); } /** {@inheritDoc} */ protected String toPDFString() { if (getNumber() == null) { throw new IllegalArgumentException( "The number of this PDFNumber must not be empty"); } StringBuffer sb = new StringBuffer(64); if (hasObjectNumber()) { sb.append(getObjectID()); } sb.append(getNumber().toString()); if (hasObjectNumber()) { sb.append("\nendobj\n"); } return sb.toString(); } }