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package com.izforge.izpack.panels.jdkpath;
import com.coi.tools.os.win.MSWinConstants;
import com.izforge.izpack.api.data.InstallData;
import com.izforge.izpack.api.exception.NativeLibException;
import com.izforge.izpack.api.resource.Messages;
import com.izforge.izpack.core.os.RegistryDefaultHandler;
import com.izforge.izpack.core.os.RegistryHandler;
import com.izforge.izpack.panels.path.PathInputBase;
import com.izforge.izpack.util.FileExecutor;
import com.izforge.izpack.util.OsVersion;
import com.izforge.izpack.util.Platform;
import java.io.File;
import java.util.Arrays;
import java.util.StringTokenizer;
public class JDKPathPanelHelper
{
public static final String[] TEST_FILES = new String[]{ "bin" + File.separator + "javac" + (OsVersion.IS_WINDOWS ? ".exe" : "")};
public static final String JDK_VALUE_NAME = "JavaHome";
public static final String JDK_ROOT_KEY = "Software\\JavaSoft\\Java Development Kit";
public static final String OSX_JDK_HOME = "/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home/";
public final static String JDK_PATH = "jdkPath";
public final static String JDK_VAR_NAME = "jdkVarName";
private static String minVersion = null;
private static String maxVersion = null;
/**
* MUST always be called in constructor of JDKPathConsolePanel and JDKPathPanel
* @param installData
*/
public static void initialize(InstallData installData)
{
minVersion = installData.getVariable("JDKPathPanel.minVersion");
maxVersion = installData.getVariable("JDKPathPanel.maxVersion");
installData.setVariable(JDK_VAR_NAME, JDK_PATH);
}
/**
* Obtain the default java path
* @param installData
* @param handler
* @return
*/
public static String getDefaultJavaPath(InstallData installData, RegistryDefaultHandler handler)
{
String detectedJavaVersion = "";
String defaultValue = installData.getVariable(JDK_PATH);
if(defaultValue != null)
{
return defaultValue;
}
if (OsVersion.IS_OSX)
{
defaultValue = OSX_JDK_HOME;
}
else
{
defaultValue = (new File(installData.getVariable("JAVA_HOME"))).getParent();
}
//See if java from currently running jre is valid, otherwise check the registry.
//If java is still not found set path ot JAVA_HOME to an empty string.
Platform platform = installData.getPlatform();
detectedJavaVersion = JDKPathPanelHelper.getCurrentJavaVersion(defaultValue, platform);
if (!JDKPathPanelHelper.pathIsValid(defaultValue) || !JDKPathPanelHelper.verifyVersion(detectedJavaVersion))
{
defaultValue = JDKPathPanelHelper.getJavaHomeFromRegistry(handler);
detectedJavaVersion = JDKPathPanelHelper.getCurrentJavaVersion(defaultValue, platform);
if (!JDKPathPanelHelper.pathIsValid(defaultValue) || !JDKPathPanelHelper.verifyVersion(detectedJavaVersion))
{
defaultValue = "";
}
}
return PathInputBase.normalizePath(defaultValue);
}
/**
* Returns the path to the needed JDK if found in the registry. If there are more than one JDK
* registered, that one with the highest allowed version will be returned. Works only on Windows.
* On Unix an empty string returns.
*
* @return the path to the needed JDK if found in the Windows registry
*/
public static String getJavaHomeFromRegistry(RegistryDefaultHandler handler)
{
String javaHome = "";
int oldVal = 0;
RegistryHandler registryHandler = null;
try
{
// Get the default registry handler.
registryHandler = handler.getInstance();
if (registryHandler == null)
{
// We are on a os which has no registry or the
// needed dll was not bound to this installation. In
// both cases we forget the try to get the JDK path from registry.
return javaHome;
}
oldVal = registryHandler.getRoot(); // Only for security...
registryHandler.setRoot(MSWinConstants.HKEY_LOCAL_MACHINE);
String[] keys = registryHandler.getSubkeys(JDK_ROOT_KEY);
if (keys == null || keys.length == 0)
{
return javaHome;
}
Arrays.sort(keys);
int i = keys.length - 1;
// We search for the highest allowed version, therefore retrograde
while (i > 0)
{
String javaVersion = extractJavaVersion(keys[i]);
if (maxVersion == null || compareVersions(javaVersion, maxVersion, false))
{
// First allowed version found, now we have to test that the min value
// also allows this version.
if (minVersion == null || compareVersions(javaVersion, minVersion, true))
{
String cv = JDK_ROOT_KEY + "\\" + keys[i];
String path = registryHandler.getValue(cv, JDK_VALUE_NAME).getStringData();
// Use it only if the path is valid.
// Set the path for method JDKPathPanelHelper.pathIsValid ...
if (JDKPathPanelHelper.pathIsValid(path))
{
javaHome = path;
break;
}
}
}
i--;
}
}
catch (Exception e)
{ // Will happen only if registry handler is good, but an
// exception at performing was thrown. This is an error...
e.printStackTrace();
}
finally
{
if (registryHandler != null && oldVal != 0)
{
try
{
registryHandler.setRoot(MSWinConstants.HKEY_LOCAL_MACHINE);
}
catch (NativeLibException e)
{
e.printStackTrace();
}
}
}
return javaHome;
}
/**
* Returns whether the chosen path is true or not. If existFiles are not null, the existence of
* it under the chosen path are detected. This method can be also implemented in derived
* classes to handle special verification of the path.
*
* @return true if existFiles are exist or not defined, else false
*/
private static boolean pathIsValid(String strPath)
{
for (String existFile : TEST_FILES)
{
File path = new File(strPath, existFile).getAbsoluteFile();
if (path.exists())
{
return true;
}
}
return false;
}
/**
* Validate that the given javaVersion meets the minimum and maximum java version requirements.
*
* @param javaVersion
* @return
*/
private static boolean verifyVersion(String javaVersion)
{
boolean valid = true;
// No min and max, version always ok.
if (minVersion == null && maxVersion == null)
{
return true;
}
if (minVersion != null)
{
if (!compareVersions(javaVersion, minVersion, true))
{
valid = false;
}
}
if (maxVersion != null)
{
if (!compareVersions(javaVersion, maxVersion, false))
{
valid = false;
}
}
return valid;
}
/**
* Run the java binary from the JAVA_HOME directory specified from the user.
* We do this to figure out what version of java the user has specified
*
* @param path JAVA_HOME
* @param platform specifies which platform user is running installation on
* @return string representation of the java version
*/
public static String getCurrentJavaVersion(String path, Platform platform)
{
String[] params;
if (platform.isA(Platform.Name.WINDOWS))
{
params = new String[]{
"cmd",
"/c",
path + File.separator + "bin" + File.separator + "java",
"-version"
};
}
else
{
params = new String[]{
path + File.separator + "bin" + File.separator + "java",
"-version"
};
}
String[] output = new String[2];
FileExecutor fe = new FileExecutor();
fe.executeCommand(params, output);
// Get version information from stdout or stderr, may vary across machines
String versionInformation = (output[0].length() > 0) ? output[0] : output[1];
return extractJavaVersion(versionInformation);
}
/**
* Given a 'dirty' string representing the javaVersion.
* Extract the actual java version and strip away any extra information.
*
* @param javaVersion
* @return
*/
public static String extractJavaVersion(String javaVersion)
{
//Were originally parameters
int assumedPlace = 4;
int halfRange = 4;
String useNotIdentifier = "__NO_NOT_IDENTIFIER_";
StringTokenizer tokenizer = new StringTokenizer(javaVersion, " \t\n\r\f\"");
int i;
int currentRange = 0;
String[] interestedEntries = new String[halfRange + halfRange];
for (i = 0; i < assumedPlace - halfRange; ++i)
{
if (tokenizer.hasMoreTokens())
{
tokenizer.nextToken(); // Forget this entries.
}
}
for (i = 0; i < halfRange + halfRange; ++i)
{ // Put the interesting Strings into an intermediaer array.
if (tokenizer.hasMoreTokens())
{
interestedEntries[i] = tokenizer.nextToken();
currentRange++;
}
}
for (i = 0; i < currentRange; ++i)
{
if (useNotIdentifier != null && interestedEntries[i].contains(useNotIdentifier))
{
continue;
}
if (Character.getType(interestedEntries[i].charAt(0)) != Character.DECIMAL_DIGIT_NUMBER)
{
continue;
}
break;
}
if (i == currentRange)
{
return "";
}
return interestedEntries[i];
}
/**
* Validate that the given javaVersion meets the minimum and maximum java version requirements.
*
* @param currentVersion
* @param template
* @param isMin
* @return
*/
private static boolean compareVersions(String currentVersion, String template, boolean isMin)
{
StringTokenizer currentTokenizer = new StringTokenizer(currentVersion, "._-");
StringTokenizer neededTokenizer = new StringTokenizer(template, "._-");
while (neededTokenizer.hasMoreTokens())
{
// Current can have no more tokens if needed has more
// and if a previous token was not accepted as good version.
// e.g. 1.4.2_02 needed, 1.4.2 current. The false return
// will be right here. Only if e.g. needed is 1.4.2_00 the
// return value will be false, but zero should not b e used
// at the last version part.
if (!currentTokenizer.hasMoreTokens())
{
return (false);
}
String current = currentTokenizer.nextToken();
String needed = neededTokenizer.nextToken();
int currentValue;
int neededValue;
try
{
currentValue = Integer.parseInt(current);
neededValue = Integer.parseInt(needed);
}
catch (NumberFormatException nfe)
{ // A number format exception will be raised if
// there is a non-numeric part in the version,
// e.g. 1.5.0_beta. The verification runs only into
// this deep area of version number (fourth sub place)
// if all others are equal to the given limit. Then
// it is right to return false because e.g.
// the minimal needed version will be 1.5.0.2.
return (false);
}
if (currentValue < neededValue)
{
if (isMin)
{
return false;
}
return true;
}
else if (currentValue > neededValue)
{
if (isMin)
{
return true;
}
return false;
}
}
return true;
}
/**
* Central validation of java path.
* Also gives allowance to central strings.
*
* @param javaHome JAVA_HOME path to test
* @param javaVersion the java version being queried
* @param messages available messages
* @return error message if validation failed, otherwise an empty string
*/
public static String validate(String javaHome, String javaVersion, Messages messages)
{
StringBuilder message = new StringBuilder();
if(!pathIsValid(javaHome))
{
message.append(messages.get("JDKPathPanel.notValid"));
}
else if (!verifyVersion(javaVersion))
{
message.append(messages.get("JDKPathPanel.badVersion1"))
.append(javaVersion)
.append(messages.get("JDKPathPanel.badVersion2"));
if (minVersion != null && maxVersion != null)
{
message.append(minVersion).append(" - ").append(maxVersion);
}
else if (minVersion != null)
{
message.append(" >= ").append(minVersion);
}
else if (maxVersion != null)
{
message.append(" <= ").append(maxVersion);
}
message.append(messages.get("JDKPathPanel.badVersion3"));
}
return message.toString();
}
/**
* Check if JDK panel should be skipped.
* Return true if panel should be skipped otherwise false.
*
* @param installData
* @param path
* @return
*/
public static boolean skipPanel(InstallData installData, String path)
{
String skipIfValid = installData.getVariable("JDKPathPanel.skipIfValid");
if (pathIsValid(path) && skipIfValid != null &&
("yes".equalsIgnoreCase(skipIfValid) || "true".equalsIgnoreCase(skipIfValid)))
{
installData.setVariable(JDK_PATH, path);
return true;
}
return false;
}
}
