1 files changed, 56 insertions, 0 deletions
diff --git a/src/jrummikub/ai/fdsolver/Constraints.java b/src/jrummikub/ai/fdsolver/Constraints.java
new file mode 100644
index 0000000..0885d2a
--- /dev/null
+++ b/src/jrummikub/ai/fdsolver/Constraints.java
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+package jrummikub.ai.fdsolver;
+
+import java.util.List;
+
+import jrummikub.ai.fdsolver.constraint.Filter;
+import jrummikub.ai.fdsolver.constraint.FilterConstraint;
+import jrummikub.ai.fdsolver.constraint.IfConstraint;
+import jrummikub.ai.fdsolver.constraint.IndexConstraint;
+import jrummikub.ai.fdsolver.constraint.LessThan;
+import jrummikub.ai.fdsolver.constraint.OffsetConstraint;
+import jrummikub.ai.fdsolver.constraint.SameConstraint;
+import jrummikub.ai.fdsolver.constraint.SumConstraint;
+
+public class Constraints {
+	public static Constraint when(Var<Boolean> cond, Constraint c) {
+		return new IfConstraint(false, cond, c);
+	}
+	
+	public static Constraint unless(Var<Boolean> cond, Constraint c) {
+		return new IfConstraint(true, cond, c);
+	}
+	
+	
+	public static <T> Constraint index(Var<T> target, Var<Integer> index, List<Var<T>> list) {
+		return new IndexConstraint<T>(target, index, list);
+	}
+	
+	public static <T> Constraint constant(Var<T> target, final T constant) {
+		return new FilterConstraint<T>(new Filter<T>() {
+			@Override
+			public boolean accept(T value) {
+				return value.equals(constant);
+			}
+		}, target);
+	}
+	
+	public static Constraint offset(int offset, Var<Integer> x, Var<Integer> y) {
+		return new OffsetConstraint(offset, x, y);
+	}
+
+	public static <T> Constraint same(Var<T> x, Var<T> y) {
+		return new SameConstraint<T>(x, y);
+	}
+	
+	public static Constraint sum(Var<Integer> x, Var<Integer> y, Var<Integer> z) {
+		return new SumConstraint(x, y, z);
+	}
+	
+	public static <T extends Comparable<T>> Constraint lessThan(Var<T> x, Var<T> y) {
+		return new LessThan<T>(false, x, y);
+	}
+	
+	public static <T extends Comparable<T>> Constraint lessThanEq(Var<T> x, Var<T> y) {
+		return new LessThan<T>(true, x, y);
+	}
+}