Java example source code file (CUPSPrinter.java)
The CUPSPrinter.java Java example source code
/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.print;
import java.net.URL;
import java.net.HttpURLConnection;
import java.io.OutputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import sun.print.IPPPrintService;
import sun.print.CustomMediaSizeName;
import sun.print.CustomMediaTray;
import javax.print.attribute.standard.Media;
import javax.print.attribute.standard.MediaSizeName;
import javax.print.attribute.standard.MediaSize;
import javax.print.attribute.standard.MediaTray;
import javax.print.attribute.standard.MediaPrintableArea;
import javax.print.attribute.Size2DSyntax;
import javax.print.attribute.Attribute;
import javax.print.attribute.EnumSyntax;
import javax.print.attribute.standard.PrinterName;
public class CUPSPrinter {
private static final String debugPrefix = "CUPSPrinter>> ";
private static final double PRINTER_DPI = 72.0;
private boolean initialized;
private static native String getCupsServer();
private static native int getCupsPort();
private static native boolean canConnect(String server, int port);
private static native boolean initIDs();
// These functions need to be synchronized as
// CUPS does not support multi-threading.
private static synchronized native String[] getMedia(String printer);
private static synchronized native float[] getPageSizes(String printer);
//public static boolean useIPPMedia = false; will be used later
private MediaPrintableArea[] cupsMediaPrintables;
private MediaSizeName[] cupsMediaSNames;
private CustomMediaSizeName[] cupsCustomMediaSNames;
private MediaTray[] cupsMediaTrays;
public int nPageSizes = 0;
public int nTrays = 0;
private String[] media;
private float[] pageSizes;
private String printer;
private static boolean libFound;
private static String cupsServer = null;
private static int cupsPort = 0;
static {
// load awt library to access native code
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<Void>() {
public Void run() {
System.loadLibrary("awt");
return null;
}
});
libFound = initIDs();
if (libFound) {
cupsServer = getCupsServer();
cupsPort = getCupsPort();
}
}
CUPSPrinter (String printerName) {
if (printerName == null) {
throw new IllegalArgumentException("null printer name");
}
printer = printerName;
cupsMediaSNames = null;
cupsMediaPrintables = null;
cupsMediaTrays = null;
initialized = false;
if (!libFound) {
throw new RuntimeException("cups lib not found");
} else {
// get page + tray names
media = getMedia(printer);
if (media == null) {
// either PPD file is not found or printer is unknown
throw new RuntimeException("error getting PPD");
}
// get sizes
pageSizes = getPageSizes(printer);
if (pageSizes != null) {
nPageSizes = pageSizes.length/6;
nTrays = media.length/2-nPageSizes;
assert (nTrays >= 0);
}
}
}
/**
* Returns array of MediaSizeNames derived from PPD.
*/
public MediaSizeName[] getMediaSizeNames() {
initMedia();
return cupsMediaSNames;
}
/**
* Returns array of Custom MediaSizeNames derived from PPD.
*/
public CustomMediaSizeName[] getCustomMediaSizeNames() {
initMedia();
return cupsCustomMediaSNames;
}
/**
* Returns array of MediaPrintableArea derived from PPD.
*/
public MediaPrintableArea[] getMediaPrintableArea() {
initMedia();
return cupsMediaPrintables;
}
/**
* Returns array of MediaTrays derived from PPD.
*/
public MediaTray[] getMediaTrays() {
initMedia();
return cupsMediaTrays;
}
/**
* Initialize media by translating PPD info to PrintService attributes.
*/
private synchronized void initMedia() {
if (initialized) {
return;
} else {
initialized = true;
}
if (pageSizes == null) {
return;
}
cupsMediaPrintables = new MediaPrintableArea[nPageSizes];
cupsMediaSNames = new MediaSizeName[nPageSizes];
cupsCustomMediaSNames = new CustomMediaSizeName[nPageSizes];
CustomMediaSizeName msn;
MediaPrintableArea mpa;
float length, width, x, y, w, h;
// initialize names and printables
for (int i=0; i<nPageSizes; i++) {
// media width and length
width = (float)(pageSizes[i*6]/PRINTER_DPI);
length = (float)(pageSizes[i*6+1]/PRINTER_DPI);
// media printable area
x = (float)(pageSizes[i*6+2]/PRINTER_DPI);
h = (float)(pageSizes[i*6+3]/PRINTER_DPI);
w = (float)(pageSizes[i*6+4]/PRINTER_DPI);
y = (float)(pageSizes[i*6+5]/PRINTER_DPI);
msn = new CustomMediaSizeName(media[i*2], media[i*2+1],
width, length);
// add to list of standard MediaSizeNames
if ((cupsMediaSNames[i] = msn.getStandardMedia()) == null) {
// add custom if no matching standard media
cupsMediaSNames[i] = msn;
// add this new custom msn to MediaSize array
if ((width > 0.0) && (length > 0.0)) {
new MediaSize(width, length,
Size2DSyntax.INCH, msn);
}
}
// add to list of custom MediaSizeName
// for internal use of IPPPrintService
cupsCustomMediaSNames[i] = msn;
mpa = null;
try {
mpa = new MediaPrintableArea(x, y, w, h,
MediaPrintableArea.INCH);
} catch (IllegalArgumentException e) {
if (width > 0 && length > 0) {
mpa = new MediaPrintableArea(0, 0, width, length,
MediaPrintableArea.INCH);
}
}
cupsMediaPrintables[i] = mpa;
}
// initialize trays
cupsMediaTrays = new MediaTray[nTrays];
MediaTray mt;
for (int i=0; i<nTrays; i++) {
mt = new CustomMediaTray(media[(nPageSizes+i)*2],
media[(nPageSizes+i)*2+1]);
cupsMediaTrays[i] = mt;
}
}
/**
* Get CUPS default printer using IPP.
* Returns 2 values - index 0 is printer name, index 1 is the uri.
*/
static String[] getDefaultPrinter() {
try {
URL url = new URL("http", getServer(), getPort(), "");
final HttpURLConnection urlConnection =
IPPPrintService.getIPPConnection(url);
if (urlConnection != null) {
OutputStream os = (OutputStream)java.security.AccessController.
doPrivileged(new java.security.PrivilegedAction() {
public Object run() {
try {
return urlConnection.getOutputStream();
} catch (Exception e) {
}
return null;
}
});
if (os == null) {
return null;
}
AttributeClass attCl[] = {
AttributeClass.ATTRIBUTES_CHARSET,
AttributeClass.ATTRIBUTES_NATURAL_LANGUAGE,
new AttributeClass("requested-attributes",
AttributeClass.TAG_URI,
"printer-uri")
};
if (IPPPrintService.writeIPPRequest(os,
IPPPrintService.OP_CUPS_GET_DEFAULT,
attCl)) {
HashMap defaultMap = null;
String[] printerInfo = new String[2];
InputStream is = urlConnection.getInputStream();
HashMap[] responseMap = IPPPrintService.readIPPResponse(
is);
is.close();
if (responseMap != null && responseMap.length > 0) {
defaultMap = responseMap[0];
}
if (defaultMap == null) {
os.close();
urlConnection.disconnect();
/* CUPS on OS X, as initially configured, considers the
* default printer to be the last one used that's
* presently available. So if no default was
* reported, exec lpstat -d which has all the Apple
* special behaviour for this built in.
*/
if (UnixPrintServiceLookup.isMac()) {
printerInfo[0] = UnixPrintServiceLookup.
getDefaultPrinterNameSysV();
printerInfo[1] = null;
return (String[])printerInfo.clone();
} else {
return null;
}
}
AttributeClass attribClass = (AttributeClass)
defaultMap.get("printer-name");
if (attribClass != null) {
printerInfo[0] = attribClass.getStringValue();
attribClass = (AttributeClass)defaultMap.get("device-uri");
if (attribClass != null) {
printerInfo[1] = attribClass.getStringValue();
} else {
printerInfo[1] = null;
}
os.close();
urlConnection.disconnect();
return (String [])printerInfo.clone();
}
}
os.close();
urlConnection.disconnect();
}
} catch (Exception e) {
}
return null;
}
/**
* Get list of all CUPS printers using IPP.
*/
static String[] getAllPrinters() {
try {
URL url = new URL("http", getServer(), getPort(), "");
final HttpURLConnection urlConnection =
IPPPrintService.getIPPConnection(url);
if (urlConnection != null) {
OutputStream os = (OutputStream)java.security.AccessController.
doPrivileged(new java.security.PrivilegedAction() {
public Object run() {
try {
return urlConnection.getOutputStream();
} catch (Exception e) {
}
return null;
}
});
if (os == null) {
return null;
}
AttributeClass attCl[] = {
AttributeClass.ATTRIBUTES_CHARSET,
AttributeClass.ATTRIBUTES_NATURAL_LANGUAGE,
new AttributeClass("requested-attributes",
AttributeClass.TAG_KEYWORD,
"printer-uri-supported")
};
if (IPPPrintService.writeIPPRequest(os,
IPPPrintService.OP_CUPS_GET_PRINTERS, attCl)) {
InputStream is = urlConnection.getInputStream();
HashMap[] responseMap =
IPPPrintService.readIPPResponse(is);
is.close();
os.close();
urlConnection.disconnect();
if (responseMap == null || responseMap.length == 0) {
return null;
}
ArrayList printerNames = new ArrayList();
for (int i=0; i< responseMap.length; i++) {
AttributeClass attribClass = (AttributeClass)
responseMap[i].get("printer-uri-supported");
if (attribClass != null) {
String nameStr = attribClass.getStringValue();
printerNames.add(nameStr);
}
}
return (String[])printerNames.toArray(new String[] {});
} else {
os.close();
urlConnection.disconnect();
}
}
} catch (Exception e) {
}
return null;
}
/**
* Returns CUPS server name.
*/
public static String getServer() {
return cupsServer;
}
/**
* Returns CUPS port number.
*/
public static int getPort() {
return cupsPort;
}
/**
* Detects if CUPS is running.
*/
public static boolean isCupsRunning() {
IPPPrintService.debug_println(debugPrefix+"libFound "+libFound);
if (libFound) {
IPPPrintService.debug_println(debugPrefix+"CUPS server "+getServer()+
" port "+getPort());
return canConnect(getServer(), getPort());
} else {
return false;
}
}
}
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