feat(java,info): revert java info to pre protobuf version (#727)

* revert to the pre-protobuf version

* format

* remove extra util class

* format

* fix

Author: yangxk1

maven-projects/info/pom.xml

@@ -42,17 +42,9 @@
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <protobuf-maven-plugin.version>2.3.0</protobuf-maven-plugin.version>
-        <protobuf.version>4.27.1</protobuf.version>
     </properties>
 
     <dependencies>
-        <dependency>
-            <groupId>com.google.protobuf</groupId>
-            <artifactId>protobuf-java</artifactId>
-            <version>${protobuf.version}</version>
-            <scope>compile</scope>
-        </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
@@ -65,28 +57,15 @@
             <version>2.0</version>
             <scope>compile</scope>
         </dependency>
+        <dependency>
+            <groupId>org.apache.hadoop</groupId>
+            <artifactId>hadoop-common</artifactId>
+            <version>3.4.0</version>
+        </dependency>
     </dependencies>
 
     <build>
         <plugins>
-            <plugin>
-                <groupId>io.github.ascopes</groupId>
-                <artifactId>protobuf-maven-plugin</artifactId>
-                <version>${protobuf-maven-plugin.version}</version>
-                <configuration>
-                    <sourceDirectories>
-                        <sourceDirectory>${project.basedir}/../../format</sourceDirectory>
-                    </sourceDirectories>
-                    <protocVersion>${protobuf.version}</protocVersion>
-                </configuration>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>generate</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
             <plugin>
                 <groupId>com.diffplug.spotless</groupId>
                 <artifactId>spotless-maven-plugin</artifactId>
@@ -100,54 +79,6 @@
                     </java>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-shade-plugin</artifactId>
-                <version>3.6.0</version>
-                <configuration>
-                    <shadedArtifactAttached>false</shadedArtifactAttached>
-                    <shadeTestJar>false</shadeTestJar>
-                    <artifactSet>
-                        <includes>
-                            <include>com.google.protobuf:*</include>
-                            <include>org.yaml:*</include>
-                        </includes>
-                    </artifactSet>
-                    <relocations>
-                        <relocation>
-                            <pattern>com.google.protobuf</pattern>
-                            <shadedPattern>org.graphar.protobuf</shadedPattern>
-                            <includes>
-                                <include>com.google.protobuf.**</include>
-                            </includes>
-                        </relocation>
-                        <relocation>
-                            <pattern>org.yaml</pattern>
-                            <shadedPattern>org.graphar.yaml</shadedPattern>
-                            <includes>
-                                <include>org.yaml.**</include>
-                            </includes>
-                        </relocation>
-                    </relocations>
-                    <filters>
-                        <filter>
-                            <artifact>*:*</artifact>
-                            <excludes>
-                                <exclude>google/protobuf/**</exclude>
-                                <exclude>yaml/snakeyaml/**</exclude>
-                            </excludes>
-                        </filter>
-                    </filters>
-                </configuration>
-                <executions>
-                    <execution>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>shade</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
         </plugins>
     </build>
 

maven-projects/info/src/main/java/org/apache/graphar/info/AdjacentList.java

@@ -19,42 +19,38 @@
 
 package org.apache.graphar.info;
 
-import org.apache.graphar.proto.AdjListType;
-import org.apache.graphar.proto.FileType;
+import org.apache.graphar.info.type.AdjListType;
+import org.apache.graphar.info.type.FileType;
+import org.apache.graphar.info.yaml.AdjacentListYaml;
 
 public class AdjacentList {
-    private final org.apache.graphar.proto.AdjacentList protoAdjacentList;
+    private final AdjListType type;
+    private final FileType fileType;
+    private final String prefix;
 
     public AdjacentList(AdjListType type, FileType fileType, String prefix) {
-        protoAdjacentList =
-                org.apache.graphar.proto.AdjacentList.newBuilder()
-                        .setType(type)
-                        .setFileType(fileType)
-                        .setPrefix(prefix)
-                        .build();
+        this.type = type;
+        this.fileType = fileType;
+        this.prefix = prefix;
     }
 
-    private AdjacentList(org.apache.graphar.proto.AdjacentList protoAdjacentList) {
-        this.protoAdjacentList = protoAdjacentList;
-    }
-
-    public static AdjacentList ofProto(org.apache.graphar.proto.AdjacentList protoAdjacentList) {
-        return new AdjacentList(protoAdjacentList);
+    AdjacentList(AdjacentListYaml yamlParser) {
+        this.type =
+                AdjListType.fromOrderedAndAlignedBy(
+                        yamlParser.isOrdered(), yamlParser.getAligned_by());
+        this.fileType = FileType.fromString(yamlParser.getFile_type());
+        this.prefix = yamlParser.getPrefix();
     }
 
     public AdjListType getType() {
-        return protoAdjacentList.getType();
+        return type;
     }
 
     public FileType getFileType() {
-        return protoAdjacentList.getFileType();
+        return fileType;
     }
 
     public String getPrefix() {
-        return protoAdjacentList.getPrefix();
-    }
-
-    org.apache.graphar.proto.AdjacentList getProto() {
-        return protoAdjacentList;
+        return prefix;
     }
 }