feat: PduObjectBuilder

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.sipgate.li</groupId>
 	<artifactId>lib</artifactId>
-	<version>0.2.0-SNAPSHOT</version>
+	<version>0.2.1-SNAPSHOT</version>
 	<name>lib</name>
 	<description>X1/X2/X3 library for Java based on ETSI TS 103 221</description>
 

src/main/java/com/sipgate/li/lib/x2x3/PduObject.java

@@ -16,11 +16,11 @@ public record PduObject(
   byte[] payload
 ) {
   public PduObject {
-    if (majorVersion != 0) {
-      throw new PduValidationException("Must be 0", "majorVersion");
+    if (majorVersion != MAJOR_VERSION) {
+      throw new PduValidationException("Must be " + MAJOR_VERSION, "majorVersion");
     }
-    if (minorVersion != 5) {
-      throw new PduValidationException("Must be 5", "minorVersion");
+    if (minorVersion != MINOR_VERSION) {
+      throw new PduValidationException("Must be " + MINOR_VERSION, "minorVersion");
     }
     if (pduType == PduType.X2_PDU && !payloadFormat.x2allowed) {
       throw new PduValidationException("Must be X2 compatible", "payloadFormat");
@@ -39,6 +39,8 @@ public record PduObject(
     }
   }
 
+  public static final int MINOR_VERSION = 5;
+  public static final int MAJOR_VERSION = 0;
   public static final int MANDATORY_HEADER_LENGTH = 40;
   public static final int CORRELATION_ID_LENGTH = 8;
 }

src/main/java/com/sipgate/li/lib/x2x3/PduObjectBuilder.java

@@ -0,0 +1,101 @@
+package com.sipgate.li.lib.x2x3;
+
+import java.util.UUID;
+
+public class PduObjectBuilder {
+
+  private Short majorVersion;
+  private Short minorVersion;
+  private PduType pduType;
+  private Long headerLength;
+  private Long payloadLength;
+  private PayloadFormat payloadFormat;
+  private PayloadDirection payloadDirection;
+  private UUID xid;
+  private byte[] correlationID;
+  private byte[] conditionalAttributeFields;
+  private byte[] payload;
+
+  public PduObjectBuilder setMajorVersion(final Short majorVersion) {
+    this.majorVersion = majorVersion;
+    return this;
+  }
+
+  public PduObjectBuilder setMinorVersion(final Short minorVersion) {
+    this.minorVersion = minorVersion;
+    return this;
+  }
+
+  public PduObjectBuilder setPduType(final PduType pduType) {
+    this.pduType = pduType;
+    return this;
+  }
+
+  public PduObjectBuilder setHeaderLength(final Long headerLength) {
+    this.headerLength = headerLength;
+    return this;
+  }
+
+  public PduObjectBuilder setPayloadLength(final Long payloadLength) {
+    this.payloadLength = payloadLength;
+    return this;
+  }
+
+  public PduObjectBuilder setPayloadFormat(final PayloadFormat payloadFormat) {
+    this.payloadFormat = payloadFormat;
+    return this;
+  }
+
+  public PduObjectBuilder setPayloadDirection(final PayloadDirection payloadDirection) {
+    this.payloadDirection = payloadDirection;
+    return this;
+  }
+
+  public PduObjectBuilder setXid(final UUID xid) {
+    this.xid = xid;
+    return this;
+  }
+
+  public PduObjectBuilder setCorrelationID(final byte[] correlationID) {
+    this.correlationID = correlationID;
+    return this;
+  }
+
+  public PduObjectBuilder setConditionalAttributeFields(final byte[] conditionalAttributeFields) {
+    this.conditionalAttributeFields = conditionalAttributeFields;
+    return this;
+  }
+
+  public PduObjectBuilder setPayload(final byte[] payload) {
+    this.payload = payload;
+    return this;
+  }
+
+  public PduObject build() {
+    final byte[] conditionalAttributeFields = this.conditionalAttributeFields != null
+      ? this.conditionalAttributeFields
+      : new byte[0];
+    final byte[] payload = this.payload != null ? this.payload : new byte[0];
+    return new PduObject(
+      this.majorVersion != null ? this.majorVersion : PduObject.MAJOR_VERSION,
+      this.minorVersion != null ? this.minorVersion : PduObject.MINOR_VERSION,
+      this.pduType != null ? this.pduType : PduType.X2_PDU,
+      this.headerLength != null
+        ? this.headerLength
+        : PduObject.MANDATORY_HEADER_LENGTH + conditionalAttributeFields.length,
+      this.payloadLength != null ? this.payloadLength : payload.length,
+      this.payloadFormat != null ? this.payloadFormat : PayloadFormat.SIP,
+      this.payloadDirection != null ? this.payloadDirection : PayloadDirection.SENT_FROM_TARGET,
+      this.xid != null ? this.xid : UUID.randomUUID(),
+      this.correlationID != null ? this.correlationID : new byte[PduObject.CORRELATION_ID_LENGTH],
+      conditionalAttributeFields,
+      payload
+    );
+  }
+
+  public PduObject buildSip() {
+    this.pduType = PduType.X2_PDU;
+    this.payloadFormat = PayloadFormat.SIP;
+    return build();
+  }
+}