1 files changed, 100 insertions, 0 deletions
diff --git a/src/main/java/dev/dnpm/oshelper/atc/AtcCode.java b/src/main/java/dev/dnpm/oshelper/atc/AtcCode.java
new file mode 100644
index 0000000..9f33f6b
--- /dev/null
+++ b/src/main/java/dev/dnpm/oshelper/atc/AtcCode.java
@@ -0,0 +1,100 @@
+/*
+ * This file is part of onkostar-plugin-dnpm
+ *
+ * Copyright (c) 2025 the original author or authors.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package dev.dnpm.oshelper.atc;
+
+import java.util.Objects;
+
+/**
+ * ATC-Code as used in WHO XML file
+ *
+ * @author Paul-Christian Volkmer
+ * @since 2.0.0
+ */
+public class AtcCode implements AgentCode {
+
+    private final String code;
+    private final String name;
+
+    private final String version;
+
+    public AtcCode(String code, String name) {
+        this.code = code;
+        this.name = name;
+        this.version = null;
+    }
+
+    public AtcCode(String code, String name, String version) {
+        this.code = code;
+        this.name = name;
+        this.version = version;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public CodeSystem getSystem() {
+        return CodeSystem.ATC;
+    }
+
+    public String getVersion() {
+        return version;
+    }
+
+    @Override
+    public int compareTo(final AgentCode agentCode) {
+        return this.name.toLowerCase().compareTo(agentCode.getName().toLowerCase());
+    }
+
+    @Override
+    public boolean equals(final Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        AgentCode otherAgentCode = (AgentCode) o;
+        return Objects.equals(code.toLowerCase(), otherAgentCode.getCode().toLowerCase())
+                && Objects.equals(name.toLowerCase(), otherAgentCode.getName().toLowerCase())
+                && Objects.equals(version, otherAgentCode.getVersion());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(code.toLowerCase(), name.toLowerCase());
+    }
+
+    /**
+     * Checks for usable ATC code starting at level 2
+     * @param code Code to be checked
+     * @return Will return <code>true</code> if code matches ATC code scheme
+     */
+    public static boolean isAtcCode(String code) {
+        return null != code
+                && ! code.isBlank()
+                && code.matches("[ABCDGHJLMNPRSV][0-2][1-9]([A-Z]([A-Z](\\d{2})?)?)?");
+    }
+}