add [Nullable]BooleanClosure

3 files changed, 119 insertions, 0 deletions

diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/BooleanClosure.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/BooleanClosure.java
new file mode 100644
index 0000000000..957e6009c9
--- /dev/null
+++ b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/BooleanClosure.java
@@ -0,0 +1,46 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Oracle. All rights reserved.
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0, which accompanies this distribution
+ * and is available at http://www.eclipse.org/legal/epl-v10.html.
+ * 
+ * Contributors:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.common.utility.internal.closure;
+
+import org.eclipse.jpt.common.utility.closure.Closure;
+import org.eclipse.jpt.common.utility.internal.ObjectTools;
+
+/**
+ * Adapt a <code>boolean</code> "closure" to the {@link Closure} interface.
+ * The closure's argument can never be <code>null</code>.
+ */
+public class BooleanClosure
+	implements Closure<Boolean>
+{
+	private final Adapter adapter;
+
+
+	public BooleanClosure(Adapter adapter) {
+		super();
+		if (adapter == null) {
+			throw new NullPointerException();
+		}
+		this.adapter = adapter;
+	}
+
+	public void execute(Boolean argument) {
+		// a null argument will result in a NPE
+		this.adapter.execute(argument.booleanValue());
+	}
+
+	@Override
+	public String toString() {
+		return ObjectTools.toString(this, this.adapter);
+	}
+
+	public interface Adapter {
+		void execute(boolean argument);
+	}
+}
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/ClosureTools.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/ClosureTools.java
index a6b96476d7..83a4a8f576 100644
--- a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/ClosureTools.java
+++ b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/ClosureTools.java
@@ -268,6 +268,36 @@ public final class ClosureTools {
 	}
 
 
+	// ********** boolean **********
+
+	/**
+	 * Return a closure that adapts the specified <code>boolean</code> "closure".
+	 * If the closure's argument is <code>null</code>, the closure will throw a
+	 * {@link NullPointerException}.
+	 */
+	public static Closure<Boolean> booleanClosure(BooleanClosure.Adapter adapter) {
+		return new BooleanClosure(adapter);
+	}
+
+	/**
+	 * Return a closure that adapts the specified <code>boolean</code> "closure".
+	 * If the closure's argument is <code>null</code>, the <code>boolean</code> "closure"
+	 * will be passed an argument of <code>false</code>.
+	 */
+	public static Closure<Boolean> nullableBooleanClosure(BooleanClosure.Adapter adapter) {
+		return nullableBooleanClosure(adapter, false);
+	}
+
+	/**
+	 * Return a closure that adapts the specified <code>boolean</code> "closure".
+	 * If the closure's argument is <code>null</code>, the <code>boolean</code> "closure"
+	 * will be passed the specified null argument value.
+	 */
+	public static Closure<Boolean> nullableBooleanClosure(BooleanClosure.Adapter adapter, boolean nullArgumentValue) {
+		return new NullableBooleanClosure(adapter, nullArgumentValue);
+	}
+
+
 	// ********** disabled **********
 
 	/**
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/NullableBooleanClosure.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/NullableBooleanClosure.java
new file mode 100644
index 0000000000..58eb95e9f0
--- /dev/null
+++ b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/closure/NullableBooleanClosure.java
@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Oracle. All rights reserved.
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0, which accompanies this distribution
+ * and is available at http://www.eclipse.org/legal/epl-v10.html.
+ * 
+ * Contributors:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.common.utility.internal.closure;
+
+import org.eclipse.jpt.common.utility.closure.Closure;
+import org.eclipse.jpt.common.utility.internal.ObjectTools;
+
+/**
+ * Adapt a <code>boolean</code> "closure" to the {@link Closure} interface.
+ * The closure's argument can never be <code>null</code>.
+ */
+public class NullableBooleanClosure
+	implements Closure<Boolean>
+{
+	private final BooleanClosure.Adapter adapter;
+	private final boolean nullArgumentValue;
+
+
+	public NullableBooleanClosure(BooleanClosure.Adapter adapter, boolean nullArgumentValue) {
+		super();
+		if (adapter == null) {
+			throw new NullPointerException();
+		}
+		this.adapter = adapter;
+		this.nullArgumentValue = nullArgumentValue;
+	}
+
+	public void execute(Boolean argument) {
+		this.adapter.execute((argument != null) ? argument.booleanValue() : this.nullArgumentValue);
+	}
+
+	@Override
+	public String toString() {
+		return ObjectTools.toString(this, this.adapter);
+	}
+}