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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* 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.
*/
/* $Id$ */
package org.apache.fop.pdf;
/**
* This class represents a simple number object. It also contains contains some
* utility methods for outputing 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.
*
* @param doubleDown the double value
* @return the value as a string
*/
public static String doubleOut(double doubleDown) {
StringBuffer p = new StringBuffer();
if (doubleDown < 0) {
doubleDown = -doubleDown;
p.append("-");
}
double trouble = doubleDown % 1;
if (trouble > 0.950) {
p.append((int)doubleDown + 1);
} else if (trouble < 0.050) {
p.append((int)doubleDown);
} else {
String doubleString = new String(doubleDown + "");
int decimal = doubleString.indexOf(".");
if (decimal != -1) {
p.append(doubleString.substring(0, decimal));
if ((doubleString.length() - decimal) > 6) {
p.append(doubleString.substring(decimal, decimal + 6));
} else {
p.append(doubleString.substring(decimal));
}
} else {
p.append(doubleString);
}
}
return (p.toString());
}
/**
* 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) {
StringBuffer p = new StringBuffer();
if (doubleDown < 0) {
doubleDown = -doubleDown;
p.append("-");
}
double trouble = doubleDown % 1;
if (trouble > (1.0 - (5.0 / (Math.pow(10.0, dec))))) {
p.append((int)doubleDown + 1);
} else if (trouble < (5.0 / (Math.pow(10.0, dec)))) {
p.append((int)doubleDown);
} else {
String doubleString = new String(doubleDown + "");
int decimal = doubleString.indexOf(".");
if (decimal != -1) {
p.append(doubleString.substring(0, decimal));
if ((doubleString.length() - decimal) > dec) {
p.append(doubleString.substring(decimal, decimal + dec));
} else {
p.append(doubleString.substring(decimal));
}
} else {
p.append(doubleString);
}
}
return (p.toString());
}
/**
* @see org.apache.fop.pdf.PDFObject#toPDFString()
*/
protected String toPDFString() {
if (getNumber() == null) {
throw new IllegalArgumentException(
"The number of this PDFNumber must not be empty");
}
StringBuffer sb = new StringBuffer(64);
sb.append(getObjectID());
sb.append(getNumber().toString());
sb.append("\nendobj\n");
return sb.toString();
}
}
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