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package org.netbeans.modules.scala.project.classpath;
import java.beans.PropertyChangeEvent;
import org.netbeans.spi.java.classpath.ClassPathImplementation;
import org.netbeans.spi.java.classpath.PathResourceImplementation;
import org.netbeans.spi.java.classpath.support.ClassPathSupport;
import org.netbeans.api.java.classpath.ClassPath;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.List;
import java.util.ArrayList;
import java.util.Collections;
import org.netbeans.api.java.platform.JavaPlatform;
import org.netbeans.api.java.platform.JavaPlatformManager;
import org.netbeans.api.scala.platform.ScalaPlatform;
import org.netbeans.api.scala.platform.ScalaPlatformManager;
import org.netbeans.spi.project.support.ant.PropertyEvaluator;
import org.openide.util.WeakListeners;
final class BootClassPathImplementation implements ClassPathImplementation, PropertyChangeListener {
private static final String PLATFORM_ACTIVE = "platform.active"; //NOI18N
private static final String ANT_NAME = "java.platform.ant.name"; //NOI18N
private static final String J2SE = "j2se"; //NOI18N
private static final String SCALA_PLATFORM_ACTIVE = "scala.platform.active"; //NOI18N
private final PropertyEvaluator evaluator;
private JavaPlatformManager platformManager;
private ScalaPlatformManager scalaPlatformManager;
//name of project active platform
private String activePlatformName;
private String activeScalaPlatformName;
//active platform is valid (not broken reference)
private boolean isActivePlatformValid;
private boolean isActiveScalaPlatformValid;
private List<PathResourceImplementation> resourcesCache;
private PropertyChangeSupport support = new PropertyChangeSupport(this);
private long eventId;
public BootClassPathImplementation(PropertyEvaluator evaluator) {
assert evaluator != null;
this.evaluator = evaluator;
evaluator.addPropertyChangeListener(WeakListeners.propertyChange(this, evaluator));
}
public List<PathResourceImplementation> getResources() {
long currentId;
synchronized (this) {
if (this.resourcesCache != null) {
return this.resourcesCache;
}
currentId = eventId;
}
JavaPlatform jp = findActivePlatform ();
final List<PathResourceImplementation> result = new ArrayList<PathResourceImplementation>();
if (jp != null) {
//TODO: May also listen on CP, but from Platform it should be fixed.
final ClassPath cp = jp.getBootstrapLibraries();
assert cp != null : jp;
for (ClassPath.Entry entry : cp.entries()) {
result.add(ClassPathSupport.createResource(entry.getURL()));
}
}
ScalaPlatform sp = findActiveScalaPlatform();
if (sp != null) {
final ClassPath cp = sp.getBootstrapLibraries();
assert cp != null : cp;
for (ClassPath.Entry entry : cp.entries()) {
result.add(ClassPathSupport.createResource(entry.getURL()));
}
}
synchronized (this) {
if (currentId == eventId) {
if (this.resourcesCache == null) {
this.resourcesCache = Collections.unmodifiableList(result);
}
return this.resourcesCache;
}
else {
return Collections.unmodifiableList (result);
}
}
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
this.support.addPropertyChangeListener (listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
this.support.removePropertyChangeListener (listener);
}
protected JavaPlatform findActivePlatform () {
if (this.platformManager == null) {
this.platformManager = JavaPlatformManager.getDefault();
this.platformManager.addPropertyChangeListener(WeakListeners.propertyChange(this, this.platformManager));
}
this.activePlatformName = evaluator.getProperty(PLATFORM_ACTIVE);
final JavaPlatform activePlatform = platformManager.getDefaultPlatform();
//final JavaPlatform activePlatform = J2SEProjectUtil.getActivePlatform (this.activePlatformName);
this.isActivePlatformValid = activePlatform != null;
return activePlatform;
}
protected ScalaPlatform findActiveScalaPlatform () {
if (this.scalaPlatformManager == null) {
this.scalaPlatformManager = ScalaPlatformManager.getDefault();
this.scalaPlatformManager.addPropertyChangeListener(WeakListeners.propertyChange(this, this.platformManager));
}
this.activeScalaPlatformName = evaluator.getProperty(SCALA_PLATFORM_ACTIVE);
final ScalaPlatform activePlatform = scalaPlatformManager.getDefaultPlatform();
//final JavaPlatform activePlatform = J2SEProjectUtil.getActivePlatform (this.activePlatformName);
this.isActiveScalaPlatformValid = activePlatform != null;
return activePlatform;
}
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getSource() == this.evaluator && evt.getPropertyName().equals(PLATFORM_ACTIVE)) {
//Active platform was changed
resetCache ();
}
else if (evt.getSource() == this.platformManager && JavaPlatformManager.PROP_INSTALLED_PLATFORMS.equals(evt.getPropertyName()) && activePlatformName != null) {
//Platform definitions were changed, check if the platform was not resolved or deleted
/** @Commented by Caoyuan todo
if (this.isActivePlatformValid) {
if (J2SEProjectUtil.getActivePlatform (this.activePlatformName) == null) {
//the platform was not removed
this.resetCache();
}
}
else {
if (J2SEProjectUtil.getActivePlatform (this.activePlatformName) != null) {
this.resetCache();
}
}
*/
}
}
/**
* Resets the cache and firesPropertyChange
*/
private void resetCache () {
synchronized (this) {
resourcesCache = null;
eventId++;
}
support.firePropertyChange(PROP_RESOURCES, null, null);
}
}