1 files changed, 83 insertions, 0 deletions
diff --git a/src/main/java/org/glavo/javah/Constant.java b/src/main/java/org/glavo/javah/Constant.java
new file mode 100644
index 0000000..1e734ba
--- /dev/null
+++ b/src/main/java/org/glavo/javah/Constant.java
@@ -0,0 +1,83 @@
+package org.glavo.javah;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+import static org.glavo.javah.Utils.*;
+
+public final class Constant {
+    private static final List<Class<?>> TYPES = Arrays.asList(
+            Byte.class, Short.class, Integer.class, Long.class, Character.class, Float.class, Double.class
+    );
+
+    private final String name;
+    private final Object value;
+    private final String mangledName;
+
+    public static Constant of(String name, Object value) {
+        Objects.requireNonNull(name);
+        Objects.requireNonNull(value);
+
+        if (!TYPES.contains(value.getClass())) {
+            throw new IllegalArgumentException();
+        }
+        if (!SIMPLE_NAME_PATTERN.matcher(name).matches()) {
+            throw new IllegalArgumentException(String.format("\"%s\" is not a qualified constant name", name));
+        }
+
+        return new Constant(name, value);
+    }
+
+    private Constant(String name, Object value) {
+        this.name = name;
+        this.value = value;
+        this.mangledName = mangleName(name);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Constant)) return false;
+        Constant constant = (Constant) o;
+        return name.equals(constant.name) && value.equals(constant.value);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, value);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Constant[name=%s, value=%s]", name, value);
+    }
+
+    public String name() {
+        return name;
+    }
+
+    public Object value() {
+        return value;
+    }
+
+    public String mangledName() {
+        return mangledName;
+    }
+
+    public String valueToString() {
+        if (value instanceof Double) {
+            return value.toString();
+        }
+        if (value instanceof Float) {
+            return value + "f";
+        }
+        if (value instanceof Long) {
+            return value + "i64";
+        }
+        if (value instanceof Character) {
+            return ((int) (char) value) + "L";
+        }
+        return value + "L";
+    }
+}