ImgMath: helper Print class for debugging.

Print is a IUnaryFunction that prints its evaluated value
and returns it.

Author: acardona

src/main/java/net/imglib2/algorithm/math/Print.java

@@ -0,0 +1,47 @@
+package net.imglib2.algorithm.math;
+
+import java.util.Map;
+
+import net.imglib2.Localizable;
+import net.imglib2.algorithm.math.abstractions.AUnaryFunction;
+import net.imglib2.algorithm.math.abstractions.IFunction;
+import net.imglib2.algorithm.math.abstractions.IVar;
+import net.imglib2.converter.Converter;
+import net.imglib2.type.numeric.RealType;
+
+public final class Print extends AUnaryFunction
+{
+	private final String title;
+	
+	public Print( final String title, final Object o )
+	{
+		super( o );
+		this.title = title;
+	}
+	
+	@Override
+	public final RealType<?> eval()
+	{
+		final RealType< ? > result = this.a.eval();
+		System.out.println( title + " :: " + result );
+		return result;
+	}
+
+	@Override
+	public final RealType<?> eval( final Localizable loc)
+	{
+		final RealType< ? > result = this.a.eval( loc );
+		System.out.println( title + " :: " + result );
+		return result;
+	}
+
+	@Override
+	public Print reInit(
+			final RealType< ? > tmp,
+			final Map< String, RealType< ? > > bindings,
+			final Converter< RealType< ? >, RealType< ? > > converter,
+			final Map< IVar, IFunction > imgSources )
+	{
+		return new Print( this.title, this.a.reInit( tmp, bindings, converter, imgSources ) );
+	}
+}