From 39903e58b4be88a2bfb9aa6739aa9222aea0272b Mon Sep 17 00:00:00 2001
From: Attila Kelemen <attila.kelemen85@gmail.com>
Date: Sat, 22 Sep 2012 13:04:05 +0200
Subject: [PATCH] It is now possible to wait for properties to be loaded from
 the file.

---
 .../netbeans/gradle/project/NbGradleProject.java   | 11 ++++++++++-
 .../properties/ProjectPropertiesManager.java       | 14 +++++++++++++-
 .../project/properties/ProjectPropertiesProxy.java | 12 ++++++++++--
 3 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/src/org/netbeans/gradle/project/NbGradleProject.java b/src/org/netbeans/gradle/project/NbGradleProject.java
index 5791027d..8c695e77 100644
--- a/src/org/netbeans/gradle/project/NbGradleProject.java
+++ b/src/org/netbeans/gradle/project/NbGradleProject.java
@@ -57,7 +57,7 @@ public final class NbGradleProject implements Project {
     private final ChangeSupport modelChanges;
     private final AtomicBoolean hasModelBeenLoaded;
     private final AtomicReference<NbGradleModel> currentModelRef;
-    private final ProjectProperties properties;
+    private final ProjectPropertiesProxy properties;
     private final ProjectInfoManager projectInfoManager;
 
     private final AtomicReference<ProjectInfoRef> loadErrorRef;
@@ -148,6 +148,15 @@ public ProjectProperties getProperties() {
         return properties;
     }
 
+    public ProjectProperties tryGetLoadedProperties() {
+        if (properties.tryWaitForLoaded()) {
+            return properties;
+        }
+        else {
+            return null;
+        }
+    }
+
     public String getName() {
         return getProjectDirectory().getNameExt();
     }
diff --git a/src/org/netbeans/gradle/project/properties/ProjectPropertiesManager.java b/src/org/netbeans/gradle/project/properties/ProjectPropertiesManager.java
index f61d5584..32732319 100644
--- a/src/org/netbeans/gradle/project/properties/ProjectPropertiesManager.java
+++ b/src/org/netbeans/gradle/project/properties/ProjectPropertiesManager.java
@@ -8,6 +8,7 @@
 import javax.swing.SwingUtilities;
 import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
+import org.netbeans.gradle.project.WaitableSignal;
 import org.netbeans.gradle.project.persistent.PropertiesPersister;
 import org.netbeans.gradle.project.persistent.XmlPropertiesPersister;
 
@@ -50,7 +51,10 @@ public void stateChanged(ChangeEvent e) {
         }
     }
 
-    public static ProjectProperties getProperties(File propertiesFile) {
+    public static ProjectProperties getProperties(
+            File propertiesFile,
+            final WaitableSignal loadedSignal) {
+
         if (propertiesFile == null) throw new NullPointerException("propertiesFile");
 
         ProjectProperties result;
@@ -72,6 +76,9 @@ public void run() {
                     persister.load(newProperties, new Runnable() {
                         @Override
                         public void run() {
+                            if (loadedSignal != null) {
+                                loadedSignal.signal();
+                            }
                             setSaveOnChange(newProperties, persister);
                         }
                     });
@@ -89,6 +96,11 @@ public void run() {
                 MAIN_LOCK.unlock();
             }
         }
+        else {
+            if (loadedSignal != null) {
+                loadedSignal.signal();
+            }
+        }
 
         return result;
     }
diff --git a/src/org/netbeans/gradle/project/properties/ProjectPropertiesProxy.java b/src/org/netbeans/gradle/project/properties/ProjectPropertiesProxy.java
index 01b0e98f..a503af47 100644
--- a/src/org/netbeans/gradle/project/properties/ProjectPropertiesProxy.java
+++ b/src/org/netbeans/gradle/project/properties/ProjectPropertiesProxy.java
@@ -14,6 +14,7 @@
 import javax.swing.event.ChangeListener;
 import org.netbeans.api.java.platform.JavaPlatform;
 import org.netbeans.gradle.project.NbGradleProject;
+import org.netbeans.gradle.project.WaitableSignal;
 import org.netbeans.gradle.project.persistent.XmlPropertiesPersister;
 import org.openide.util.ChangeSupport;
 
@@ -28,12 +29,14 @@ public final class ProjectPropertiesProxy extends AbstractProjectProperties {
     private final MutablePropertyProxy<JavaPlatform> platformProxy;
     private final MutablePropertyProxy<Charset> sourceEncodingProxy;
     private final MutablePropertyProxy<List<PredefinedTask>> commonTasksProxy;
+    private final WaitableSignal loadedSignal;
 
     public ProjectPropertiesProxy(NbGradleProject project) {
         if (project == null) throw new NullPointerException("project");
         this.project = project;
         this.propertiesRef = new AtomicReference<ProjectProperties>(null);
         this.changes = new ChangeSupport(this);
+        this.loadedSignal = new WaitableSignal();
 
         this.sourceLevelProxy = new MutablePropertyProxy<String>(new ProjectMutablePropertyRef<String>(this) {
             @Override
@@ -61,17 +64,22 @@ public MutableProperty<List<PredefinedTask>> getProperty() {
         });
     }
 
+    public boolean tryWaitForLoaded() {
+        getProperties();
+        return loadedSignal.tryWaitForSignal();
+    }
+
     private ProjectProperties getProperties() {
         ProjectProperties properties = propertiesRef.get();
         if (properties == null) {
             File propertiesFile = XmlPropertiesPersister.getFileForProject(project);
-            properties = ProjectPropertiesManager.getProperties(propertiesFile);
+            properties = ProjectPropertiesManager.getProperties(propertiesFile, loadedSignal);
             if (propertiesRef.compareAndSet(null, properties)) {
                 project.addModelChangeListener(new ChangeListener() {
                     @Override
                     public void stateChanged(ChangeEvent e) {
                         File propertiesFile = XmlPropertiesPersister.getFileForProject(project);
-                        propertiesRef.set(ProjectPropertiesManager.getProperties(propertiesFile));
+                        propertiesRef.set(ProjectPropertiesManager.getProperties(propertiesFile, loadedSignal));
                         changes.fireChange();
                     }
                 });