1 files changed, 80 insertions, 0 deletions
diff --git a/src/cz/crcs/ectester/standalone/consts/Ident.java b/src/cz/crcs/ectester/standalone/consts/Ident.java
new file mode 100644
index 0000000..40a44ac
--- /dev/null
+++ b/src/cz/crcs/ectester/standalone/consts/Ident.java
@@ -0,0 +1,80 @@
+package cz.crcs.ectester.standalone.consts;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.Provider;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.function.BiFunction;
+
+public abstract class Ident {
+    Set<String> idents;
+    String name;
+
+    public Ident(String name, String... aliases) {
+        this.name = name;
+        this.idents = new TreeSet<>(String.CASE_INSENSITIVE_ORDER);
+        this.idents.add(name);
+        this.idents.addAll(Arrays.asList(aliases));
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Set<String> getIdents() {
+        return Collections.unmodifiableSet(idents);
+    }
+
+    public boolean contains(String other) {
+        return name.equals(other) || idents.contains(other);
+    }
+
+    <T> T getInstance(BiFunction<String, Provider, T> getter, Provider provider) throws NoSuchAlgorithmException {
+        T instance = null;
+        try {
+            instance = getter.apply(name, provider);
+        } catch (Exception ignored) {
+        }
+
+        if (instance == null) {
+            for (String alias : idents) {
+                try {
+                    instance = getter.apply(alias, provider);
+                    if (instance != null) {
+                        break;
+                    }
+                } catch (Exception ignored) {
+                }
+            }
+        }
+
+        if (instance == null) {
+            throw new NoSuchAlgorithmException(name);
+        }
+        return instance;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof Ident)) {
+            return false;
+        }
+        Ident other = (Ident) obj;
+        return idents.equals(other.getIdents());
+    }
+
+    @Override
+    public int hashCode() {
+        return idents.hashCode() + 37;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + String.join("|", idents) + ")";
+    }
+}