1 files changed, 101 insertions, 0 deletions
diff --git a/org.rtems.cdt.toolchain/src/org/rtems/cdt/toolchain/RtemsInstallBspDirectoryValueHandler.java b/org.rtems.cdt.toolchain/src/org/rtems/cdt/toolchain/RtemsInstallBspDirectoryValueHandler.java
new file mode 100644
index 0000000..9be247e
--- /dev/null
+++ b/org.rtems.cdt.toolchain/src/org/rtems/cdt/toolchain/RtemsInstallBspDirectoryValueHandler.java
@@ -0,0 +1,101 @@
+package org.rtems.cdt.toolchain;
+
+import org.eclipse.cdt.managedbuilder.core.IBuildObject;
+import org.eclipse.cdt.managedbuilder.core.IHoldsOptions;
+import org.eclipse.cdt.managedbuilder.core.IManagedOptionValueHandler;
+import org.eclipse.cdt.managedbuilder.core.IOption;
+import org.eclipse.core.runtime.IPath;
+
+public class RtemsInstallBspDirectoryValueHandler implements IManagedOptionValueHandler {
+  private IPath installedBspLibPath;      // e.g., /opt/rtems_install/i386-rtems4.9/pc686/lib
+  
+  public RtemsInstallBspDirectoryValueHandler() {
+    installedBspLibPath = RtemsEnvironmentVariableSupplier.getRtemsInstallBspLibDirectory();
+  }
+  
+  /**
+   * Handles transfer between values between UI element and 
+   * back-end in different circumstances.
+   * 
+   * @param configuration  build configuration of option 
+   *                       (may be IConfiguration or IResourceConfiguration)
+   * @param holder         contains the holder of the option
+   * @param option         the option that is handled
+   * @param extraArgument  extra argument for handler
+   * @param event          event to be handled, one of the following: 
+   *                       (EVENT_OPEN = 1, EVENT_CLOSE = 2, 
+   *                        EVENT_SETDEFAULT = 3, 
+   *                        EVENT_APPLY = 4, EVENT_LOAD = 5)
+   *
+   * @return  True when the event was handled, false otherwise.
+   * This enables default event handling can take place.
+   */
+  public boolean handleValue(IBuildObject configuration, IHoldsOptions holder,
+      IOption option, String extraArgument, int event) {
+    if (event == EVENT_CLOSE) return false;
+    
+    try {
+      String optionValue = (String) option.getValue();
+      if (optionValue==null || optionValue.trim().length()<=0) {
+        option.setValue(installedBspLibPath.toPortableString());
+      }
+    } catch (Exception e) {
+      return false;
+    }
+    
+    return true;
+  }
+
+  /**
+   * Checks whether the value of an option is its default value.
+   * 
+   * @param configuration  build configuration of option 
+   *                       (may be IConfiguration or IResourceConfiguration)
+   * @param holder         contains the holder of the option
+   * @param option         the option that is handled
+   * @param extraArgument  extra argument for handler
+   *
+   * The additional options besides configuration are supplied to  
+   * provide enough information for querying the default value from 
+   * a potential data storage back-end.
+   * 
+   * @return  True if the options value is its default value and
+   * False otherwise. This enables that default event handling can 
+   * take place.
+   */
+  public boolean isDefaultValue(IBuildObject configuration,
+      IHoldsOptions holder, IOption option, String extraArgument) {
+    if (installedBspLibPath==null) return false;
+        
+    return installedBspLibPath.toPortableString().equals(option.getValue());
+  }
+
+  /**
+   * Checks whether an enumeration value of an option is currently a 
+   * valid choice. The use-case for this method is the case, where
+   * the set of valid enumerations in the plugin.xml file changes.
+   * The UI will remove entries from selection lists if the value 
+   * returns false.
+   * 
+   * @param configuration  build configuration of option 
+   *                       (may be IConfiguration or IResourceConfiguration)
+   * @param holder         contains the holder of the option
+   * @param option         the option that is handled
+   * @param extraArgument  extra argument for handler
+   * @param enumValue      enumeration value that is to be checked
+   *
+   * The additional options besides configuration are supplied to  
+   * provide enough information for querying information from a 
+   * a potential data storage back-end.
+   * 
+   * @return  True if the enumeration value is valid and False 
+   * otherwise.
+   */
+  public boolean isEnumValueAppropriate(IBuildObject configuration,
+      IHoldsOptions holder, IOption option, String extraArgument,
+      String enumValue) {
+    // By default return true for all the enum values.
+    return true;
+  }
+
+}