1 files changed, 94 insertions, 0 deletions
diff --git a/config-model/src/main/java/com/yahoo/config/model/builder/xml/ConfigModelId.java b/config-model/src/main/java/com/yahoo/config/model/builder/xml/ConfigModelId.java
new file mode 100644
index 00000000000..fca114757ec
--- /dev/null
+++ b/config-model/src/main/java/com/yahoo/config/model/builder/xml/ConfigModelId.java
@@ -0,0 +1,94 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.config.model.builder.xml;
+
+import com.yahoo.component.Version;
+
+/**
+ * A {@link ConfigModelId} describes an element handled by a {@link ConfigModelBuilder}.
+ *
+ * @author lulf
+ * @since 5.1
+ */
+public class ConfigModelId implements Comparable<ConfigModelId> {
+
+    private final String name;
+    private final Version version;
+    private final String stringValue;
+
+    private ConfigModelId(String name, Version version) {
+        this.name = name;
+        this.version = version;
+        this.stringValue = toStringValue();
+    }
+
+    /**
+     * Create id with a name and version
+     * @param tagName Name of the id
+     * @param tagVersion Version of the id
+     * @return A ConfigModelId instance
+     */
+    public static ConfigModelId fromNameAndVersion(String tagName, String tagVersion) {
+        return new ConfigModelId(tagName, Version.fromString(tagVersion));
+    }
+
+    /**
+     * Create id with given name, using default version 1.
+     *
+     * @param tagName Name of the id
+     * @return A ConfigModelId instance
+     */
+    public static ConfigModelId fromName(String tagName) {
+        return new ConfigModelId(tagName, new Version(1));
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (!(object instanceof ConfigModelId)) return false;
+        ConfigModelId other = (ConfigModelId)object;
+        return this.name.equals(other.name) && this.version.equals(other.version);
+    }
+
+    @Override
+    public int compareTo(ConfigModelId other) {
+        if (other == this) return 0;
+        int cmp = this.name.compareTo(other.name);
+        if (cmp == 0) {
+            cmp = this.version.compareTo(other.version);
+        }
+        return cmp;
+    }
+
+    @Override
+    public String toString() {
+        return stringValue;
+    }
+
+    @Override
+    public int hashCode() {
+        return stringValue.hashCode();
+    }
+
+    /**
+     * Return the XML element name.
+     * @return the name of the config model
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Return the XML element version.
+     * @return the version of the config model
+     */
+    Version getVersion() {
+        return version;
+    }
+
+    private String toStringValue() {
+        StringBuilder sb = new StringBuilder();
+        sb.append(name);
+        sb.append(".");
+        sb.append(version);
+        return sb.toString();
+    }
+}