chore(client): patch for father sub edge (#654)

---------

Co-authored-by: imbajin <jin@apache.org>
Co-authored-by: VGalaxies <dyc1904821183@gmail.com>

Author: 3 people

hugegraph-client/src/main/java/org/apache/hugegraph/structure/constant/EdgeLabelType.java

@@ -23,10 +23,12 @@ public enum EdgeLabelType {
 
     PARENT(1, "PARENT"),
 
-    SUB(2, "SUB");
+    SUB(2, "SUB"),
 
-    private final byte code;
-    private final String name;
+    GENERAL(3, "GENERAL");
+
+    private byte code = 0;
+    private String name = null;
 
     EdgeLabelType(int code, String name) {
         assert code < 256;
@@ -46,6 +48,10 @@ public boolean normal() {
         return this == NORMAL;
     }
 
+    public boolean general() {
+        return this == GENERAL;
+    }
+
     public byte code() {
         return this.code;
     }

hugegraph-client/src/main/java/org/apache/hugegraph/structure/schema/EdgeLabel.java

@@ -81,6 +81,14 @@ public boolean sub() {
         return this.edgeLabelType.sub();
     }
 
+    public boolean normal() {
+        return this.edgeLabelType.normal();
+    }
+
+    public boolean general() {
+        return this.edgeLabelType.general();
+    }
+
     public String parentLabel() {
         return this.parentLabel;
     }
@@ -170,6 +178,8 @@ public interface Builder extends SchemaBuilder<EdgeLabel> {
 
         Builder withBase(String fatherLabel);
 
+        Builder asGeneral();
+
         /**
          * Set the source label of the edge label
          */
@@ -277,6 +287,12 @@ public Builder withBase(String parentLabel) {
             return this;
         }
 
+        @Override
+        public Builder asGeneral() {
+            this.edgeLabel.edgeLabelType = EdgeLabelType.GENERAL;
+            return this;
+        }
+
         /**
          * Set the source label of the edge label
          */

hugegraph-client/src/main/java/org/apache/hugegraph/structure/schema/VertexLabel.java

@@ -59,10 +59,18 @@ public IdStrategy idStrategy() {
         return this.idStrategy;
     }
 
+    public void idStrategy(IdStrategy idStrategy) {
+        this.idStrategy = idStrategy;
+    }
+
     public List<String> primaryKeys() {
         return this.primaryKeys;
     }
 
+    public void primaryKeys(List<String> primaryKeys) {
+        this.primaryKeys = primaryKeys;
+    }
+
     public long ttl() {
         return this.ttl;
     }

hugegraph-client/src/test/java/org/apache/hugegraph/api/EdgeLabelApiTest.java

@@ -543,4 +543,39 @@ public void testAddEdgeLabelWithUserData() {
         createTime = DateUtil.parse(time);
         Utils.assertBeforeNow(createTime);
     }
+
+    @Test
+    public void testEdgeLabelType() {
+        EdgeLabel normalEdgeLabel = schema().edgeLabel("created")
+                                      .sourceLabel("person")
+                                      .targetLabel("software")
+                                      .singleTime()
+                                      .properties("date", "city")
+                                      .build();
+        Assert.assertTrue(normalEdgeLabel.normal());
+
+        EdgeLabel parentEdgeLabelType = schema().edgeLabel("write")
+                                  .link("person", "book")
+                                  .properties("date", "weight")
+                                  .singleTime()
+                                  .asBase()
+                                  .build();
+        Assert.assertTrue(parentEdgeLabelType.parent());
+
+        EdgeLabel subEdgeLabelType = schema().edgeLabel("knows")
+                                  .sourceLabel("person")
+                                  .targetLabel("person")
+                                  .singleTime()
+                                  .properties("date")
+                                  .withBase("write")
+                                  .build();
+        Assert.assertTrue(subEdgeLabelType.sub());
+
+        EdgeLabel generalEdgeLabelType = schema().edgeLabel("father")
+                                   .link("person", "person")
+                                   .properties("weight")
+                                   .asGeneral()
+                                   .build();
+        Assert.assertTrue(generalEdgeLabelType.general());
+    }
 }

hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/EdgeBuilder.java

@@ -28,6 +28,7 @@
 import org.apache.hugegraph.loader.executor.LoadContext;
 import org.apache.hugegraph.loader.mapping.EdgeMapping;
 import org.apache.hugegraph.loader.mapping.InputStruct;
+import org.apache.hugegraph.structure.constant.IdStrategy;
 import org.apache.hugegraph.structure.graph.Edge;
 import org.apache.hugegraph.structure.graph.Vertex;
 import org.apache.hugegraph.structure.schema.EdgeLabel;
@@ -55,10 +56,19 @@ public EdgeBuilder(LoadContext context, InputStruct struct,
         super(context, struct);
         this.mapping = mapping;
         this.edgeLabel = this.getEdgeLabel(this.mapping.label());
-        this.sourceLabel = this.getVertexLabel(this.edgeLabel.sourceLabel());
-        this.targetLabel = this.getVertexLabel(this.edgeLabel.targetLabel());
         this.nonNullKeys = this.nonNullableKeys(this.edgeLabel);
-        // Ensure that the source/target id fields are matched with id strategy
+        if (this.edgeLabel.edgeLabelType().general()) {
+            // If create a general type edge, the loader can't obtain the vertexlabel info of both ends
+            // Therefore, the IdStrategy of both ends is uniformly set to CUSTOMIZE_STRING
+            this.sourceLabel = new VertexLabel("~general");
+            this.targetLabel = new VertexLabel("~general");
+            this.sourceLabel.idStrategy(IdStrategy.CUSTOMIZE_STRING);
+            this.targetLabel.idStrategy(IdStrategy.CUSTOMIZE_STRING);
+        } else {
+            this.sourceLabel = this.getVertexLabel(this.edgeLabel.sourceLabel());
+            this.targetLabel = this.getVertexLabel(this.edgeLabel.targetLabel());
+        }
+        // Ensure that the source/target id fileds are matched with id strategy
         this.checkIdFields(this.sourceLabel, this.mapping.sourceFields());
         this.checkIdFields(this.targetLabel, this.mapping.targetFields());