Updated README, transformations

Author: ix42

README.md

@@ -4,14 +4,6 @@
 
 ### Usage
 
-### Repositories
-
-```
-mavenCentral()
-maven("https://jitpack.io")
-maven("https://hyperledger.jfrog.io/artifactory/besu-maven")
-```
-
 #### Gradle Groovy DSL
 
 ```
@@ -53,6 +45,15 @@ application {
 }
 ```
 
+#### Repositories
+
+```
+mavenCentral()
+maven("https://jitpack.io")
+maven("https://hyperledger.jfrog.io/artifactory/besu-maven")
+```
+
+
 #### Data read sample
 
 ```java
@@ -72,7 +73,6 @@ String table = "directory";
 
 ChainClientConfig cfg =  new ChainClientConfig()
         .organization(organization)
-        .seed(seed)
         .http(new HttpClientConfig()
                 .host(host)
                 .port(port)

build.gradle.kts

@@ -115,7 +115,7 @@ publishing {
         create<MavenPublication>("Maven") {
             groupId = "com.weavechain"
             artifactId = "api"
-            version = "1.1"
+            version = "1.2"
             from(components["java"])
         }
         withType<MavenPublication> {

src/main/java/com/weavechain/core/data/DataLayout.java

@@ -140,6 +140,7 @@ private void buildTransformationsMap() {
         transformationAlgo = new HashMap<>();
 
         transformationAlgo.put(DataTransform.ERASURE, new Erasure());
+        transformationAlgo.put(DataTransform.REDACTION, new Redaction());
         transformationAlgo.put(DataTransform.HASHING, new Hashing(MappingRepositories.INSTANCE.getHashesRepository()));
         transformationAlgo.put(DataTransform.RANDOM_ID, new RandomId(MappingRepositories.INSTANCE.getRandomIdsRepository()));
         transformationAlgo.put(DataTransform.LINKED_RANDOM_ID, new RandomId(MappingRepositories.INSTANCE.getLinkedRandomIdsRepository()));

src/main/java/com/weavechain/core/data/transform/DataTransform.java

@@ -6,6 +6,8 @@ public enum DataTransform {
 
     ERASURE,            //field value is blanked. Nulls and data type are preserved
 
+    REDACTION,          //field value is replaced. Nulls and data type are preserved
+
     HASHING,            //field value is hashed (SHA2). Nulls are preserved, result data type is string
 
     RANDOM_ID,          //field value is associated a random id. Nulls are preserved, result data type is long

src/main/java/com/weavechain/core/data/transform/Redaction.java

@@ -0,0 +1,44 @@
+package com.weavechain.core.data.transform;
+
+import com.weavechain.core.data.DataLayout;
+import com.weavechain.core.encoding.Utils;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+import java.util.Map;
+
+public class Redaction implements Transformation {
+
+    @Override
+    public Object transform(String scope, String table, Object value) {
+        TransformationAlgoParams algoParams = DataLayout.getTransformAlgoParams(scope, table);
+        Redaction.Params params = algoParams != null ? algoParams.getRedactionParams() : null;
+
+        if (value == null) {
+            return null;
+        } else if (value instanceof Long) {
+            Object redacted = params != null && params.getRedactionMappings() != null ? params.getRedactionMappings().get(value) : null;
+            return redacted != null ? redacted : params != null && params.getDefaultRedaction() != null ? params.getDefaultRedaction() : 0L;
+        } else if (value instanceof Double) {
+            Object redacted = params != null && params.getRedactionMappings() != null ? params.getRedactionMappings().get(value) : null;
+            return redacted != null ? redacted : params != null && params.getDefaultRedaction() != null ? params.getDefaultRedaction() : 0d;
+        } else {
+            Object redacted = params != null && params.getRedactionMappings() != null ? params.getRedactionMappings().get(value) : null;
+            return redacted != null ? redacted : params != null && params.getDefaultRedaction() != null ? params.getDefaultRedaction() : "";
+        }
+    }
+
+    @Override
+    public String reverse(String scope, String table, Object value) {
+        throw new IllegalArgumentException("Not supported");
+    }
+
+    @Getter
+    @AllArgsConstructor
+    public static class Params {
+
+        private Object defaultRedaction;
+
+        private Map<Object, Object> redactionMappings;
+    }
+}

src/main/java/com/weavechain/core/data/transform/TransformationAlgoParams.java

@@ -15,6 +15,8 @@ public class TransformationAlgoParams {
 
     private Encrypt.Params encryptParams;
 
+    private Redaction.Params redactionParams;
+
     public TransformationAlgoParams quantizationParams(Quantization.Params value) {
         this.quantizationParams = value;
         return this;
@@ -30,11 +32,17 @@ public TransformationAlgoParams encryptParams(Encrypt.Params value) {
         return this;
     }
 
+    public TransformationAlgoParams redactionParams(Redaction.Params value) {
+        this.redactionParams = value;
+        return this;
+    }
+
     public TransformationAlgoParams copy() {
         return new TransformationAlgoParams(
                 quantizationParams,
                 noiseParams,
-                encryptParams
+                encryptParams,
+                redactionParams
         );
     }
 }