json patch now generates ExpressionSpec for DynamoDB UpdateItem

Author: cm-alexp

.gitignore

@@ -2,7 +2,12 @@
 target
 .idea
 META-INF
-out
-build
+/out
+/classes
+/build
 .gradle
-
+.classpath
+.project
+.settings
+/bin/
+/test-output

build.gradle

@@ -57,13 +57,16 @@ dependencies {
         version: "2.0.1");
     compile(group: "com.github.fge", name: "jackson-coreutils",
         version: "1.6");
+    compile(group: "com.amazonaws", name:"aws-java-sdk-dynamodb", version:"1.11.27");
     testCompile(group: "org.testng", name: "testng", version: "6.8.7") {
         exclude(group: "junit", module: "junit");
         exclude(group: "org.beanshell", module: "bsh");
         exclude(group: "org.yaml", module: "snakeyaml");
     };
     testCompile(group: "org.mockito", name: "mockito-core", version: "1.9.5");
     testCompile(group: "org.assertj", name: "assertj-core", version: "1.7.0");
+    testCompile(group:"com.jayway.jsonpath", name:"json-path-assert", version:"2.2.0");
+    testCompile(group: "com.amazonaws", name:"DynamoDBLocal", version:"1.11.0.1");
 }
 
 javadoc.options.links("http://docs.oracle.com/javase/6/docs/api/");
@@ -80,6 +83,26 @@ javadoc.options.links("http://fge.github.io/jackson-coreutils/");
  */
 repositories {
     mavenCentral();
+    maven {
+        url 'http://dynamodb-local.s3-website-us-west-2.amazonaws.com/release'
+    }
+    
+}
+
+task copyNativeDeps(type: Copy) {
+    from (configurations.testCompile) {
+        include "*.dylib"
+        include "*.so"
+        include "*.dll"
+    }
+    into 'build/libs'
+}
+
+test.dependsOn copyNativeDeps
+test.doFirst {
+    systemProperty "java.library.path", 'build/libs'
+    environment "DYLD_LIBRARY_PATH", './build/libs'
+    environment "LD_LIBRARY_PATH", './build/libs'
 }
 
 /*

src/main/java/com/amazonaws/services/dynamodbv2/xspec/NULLComparable.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.amazonaws.services.dynamodbv2.xspec;
+
+import com.amazonaws.services.dynamodbv2.xspec.NULL;
+
+/**
+ * TODO for daisuke
+ *
+ * @since 0.13
+ * @version $Id$
+ * @author Alexander Patrikalakis
+ */
+public class NULLComparable extends NULL {
+	public NULLComparable(String path) {
+		super(path);
+	}
+	public ComparatorCondition eq(Operand that) {
+		return new ComparatorCondition("=", this, that);
+	}
+	public static final LiteralOperand generateNull() {
+		return new LiteralOperand((Object) null);
+	}
+}

src/main/java/com/amazonaws/services/dynamodbv2/xspec/PathSetAction.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2015-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.amazonaws.services.dynamodbv2.xspec;
+
+/**
+ * TODO for daisuke
+ *
+ * @since 0.13
+ * @version $Id$
+ * @author Alexander Patrikalakis
+ */
+public class PathSetAction extends UpdateAction {
+	public PathSetAction(PathOperand attr, PathOperand value) {
+		super("SET", attr, value);
+	}
+}

src/main/java/com/github/fge/jsonpatch/AddOperation.java

@@ -1,5 +1,7 @@
 /*
  * Copyright (c) 2014, Francis Galiegue ([email protected])
+ * Copyright (c) 2016, Alexander Patrikalakis ([email protected])
+ * Copyright (c) 2015, Daisuke Miyamoto ([email protected])
  *
  * This software is dual-licensed under:
  *
@@ -19,6 +21,7 @@
 
 package com.github.fge.jsonpatch;
 
+import com.amazonaws.services.dynamodbv2.xspec.ExpressionSpecBuilder;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.databind.JsonNode;
@@ -28,6 +31,7 @@
 import com.github.fge.jackson.jsonpointer.ReferenceToken;
 import com.github.fge.jackson.jsonpointer.TokenResolver;
 import com.google.common.collect.Iterables;
+import com.google.common.collect.Iterators;
 
 
 /**
@@ -99,6 +103,17 @@ public JsonNode apply(final JsonNode node)
             ? addToArray(path, node)
             : addToObject(path, node);
     }
+    
+	@Override
+	public void applyToBuilder(ExpressionSpecBuilder builder) {
+		final TokenResolver<JsonNode> node = Iterators.getLast(path.iterator(), null /*default*/);
+		if(null == node || "-".equals(node.getToken().getRaw())) {
+			//list_append
+			throw new UnsupportedOperationException("list_append not supported yet");
+		} else {
+			super.applyToBuilder(builder);
+		}
+	}
 
     private JsonNode addToArray(final JsonPointer path, final JsonNode node)
         throws JsonPatchException
@@ -133,7 +148,7 @@ private JsonNode addToObject(final JsonPointer path, final JsonNode node)
     {
         final JsonNode ret = node.deepCopy();
         final ObjectNode target = (ObjectNode) path.parent().get(ret);
-        target.put(Iterables.getLast(path).getToken().getRaw(), value);
+        target.set(Iterables.getLast(path).getToken().getRaw(), value);
         return ret;
     }
 }

src/main/java/com/github/fge/jsonpatch/CopyOperation.java

@@ -1,5 +1,7 @@
 /*
  * Copyright (c) 2014, Francis Galiegue ([email protected])
+ * Copyright (c) 2016, Alexander Patrikalakis ([email protected])
+ * Copyright (c) 2015, Daisuke Miyamoto ([email protected])
  *
  * This software is dual-licensed under:
  *
@@ -19,6 +21,8 @@
 
 package com.github.fge.jsonpatch;
 
+import com.amazonaws.services.dynamodbv2.xspec.ExpressionSpecBuilder;
+import com.amazonaws.services.dynamodbv2.xspec.PathSetAction;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.databind.JsonNode;
@@ -60,4 +64,13 @@ public JsonNode apply(final JsonNode node)
                 "jsonPatch.noSuchPath"));
         return new AddOperation(path, dupData).apply(node);
     }
+    
+	@Override
+	public void applyToBuilder(ExpressionSpecBuilder builder) {
+		String copyPath = pathGenerator.apply(from);
+		String setPath = pathGenerator.apply(path);
+		//set the attribute in the path location
+		builder.addUpdate(new PathSetAction(ExpressionSpecBuilder.attribute(setPath),
+				ExpressionSpecBuilder.attribute(copyPath)));
+	}
 }

src/main/java/com/github/fge/jsonpatch/JsonPatch.java

@@ -1,5 +1,7 @@
 /*
  * Copyright (c) 2014, Francis Galiegue ([email protected])
+ * Copyright (c) 2016, Alexander Patrikalakis ([email protected])
+ * Copyright (c) 2015, Daisuke Miyamoto ([email protected])
  *
  * This software is dual-licensed under:
  *
@@ -19,6 +21,7 @@
 
 package com.github.fge.jsonpatch;
 
+import com.amazonaws.services.dynamodbv2.xspec.ExpressionSpecBuilder;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.JsonNode;
@@ -28,6 +31,7 @@
 import com.github.fge.jackson.JacksonUtils;
 import com.github.fge.msgsimple.bundle.MessageBundle;
 import com.github.fge.msgsimple.load.MessageBundles;
+import com.google.common.base.Supplier;
 import com.google.common.collect.ImmutableList;
 
 import java.io.IOException;
@@ -89,16 +93,16 @@
  * <p><b>IMPORTANT NOTE:</b> the JSON Patch is supposed to be VALID when the
  * constructor for this class ({@link JsonPatch#fromJson(JsonNode)} is used.</p>
  */
-public final class JsonPatch
-    implements JsonSerializable
+public class JsonPatch
+    implements JsonSerializable, Supplier<ExpressionSpecBuilder>
 {
     private static final MessageBundle BUNDLE
         = MessageBundles.getBundle(JsonPatchMessages.class);
 
     /**
      * List of operations
      */
-    private final List<JsonPatchOperation> operations;
+    protected final List<JsonPatchOperation> operations;
 
     /**
      * Constructor
@@ -126,7 +130,7 @@ public static JsonPatch fromJson(final JsonNode node)
         throws IOException
     {
         BUNDLE.checkNotNull(node, "jsonPatch.nullInput");
-        return JacksonUtils.getReader().withType(JsonPatch.class)
+        return JacksonUtils.getReader().forType(JsonPatch.class)
             .readValue(node);
     }
 
@@ -148,6 +152,19 @@ public JsonNode apply(final JsonNode node)
 
         return ret;
     }
+    
+    /**
+     * Converts this JsonPatch into an ExpressionSpecBuilder
+     * @return an expression spec builder that contains the updates contained in this
+     * patch
+     */
+	public ExpressionSpecBuilder get() {
+		ExpressionSpecBuilder builder = new ExpressionSpecBuilder();
+		for(JsonPatchOperation operation : operations) {
+			operation.applyToBuilder(builder);
+		}
+		return builder;
+	}
 
     @Override
     public String toString()

src/main/java/com/github/fge/jsonpatch/JsonPatchException.java

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2014, Francis Galiegue ([email protected])
+ * Copyright (c) 2016, Alexander Patrikalakis ([email protected])
  *
  * This software is dual-licensed under:
  *
@@ -19,6 +20,7 @@
 
 package com.github.fge.jsonpatch;
 
+@SuppressWarnings("serial")
 public final class JsonPatchException
     extends Exception
 {

src/main/java/com/github/fge/jsonpatch/JsonPatchOperation.java

@@ -1,5 +1,7 @@
 /*
  * Copyright (c) 2014, Francis Galiegue ([email protected])
+ * Copyright (c) 2016, Alexander Patrikalakis ([email protected])
+ * Copyright (c) 2015, Daisuke Miyamoto ([email protected])
  *
  * This software is dual-licensed under:
  *
@@ -27,10 +29,13 @@
 import com.github.fge.jackson.jsonpointer.JsonPointer;
 import com.github.fge.msgsimple.bundle.MessageBundle;
 import com.github.fge.msgsimple.load.MessageBundles;
+import com.google.common.base.Function;
 
 import static com.fasterxml.jackson.annotation.JsonSubTypes.*;
 import static com.fasterxml.jackson.annotation.JsonTypeInfo.*;
 
+import com.amazonaws.services.dynamodbv2.xspec.ExpressionSpecBuilder;
+
 @JsonTypeInfo(use = Id.NAME, include = As.PROPERTY, property = "op")
 
 @JsonSubTypes({
@@ -61,6 +66,8 @@ public abstract class JsonPatchOperation
 {
     protected static final MessageBundle BUNDLE
         = MessageBundles.getBundle(JsonPatchMessages.class);
+    
+	Function<JsonPointer, String> pathGenerator = new JsonPathToAttributePath();
 
     protected final String op;
 
@@ -94,6 +101,12 @@ protected JsonPatchOperation(final String op, final JsonPointer path)
     public abstract JsonNode apply(final JsonNode node)
         throws JsonPatchException;
 
+    /**
+     * Apply the current patch operation to an update expression builder
+     * @param builder the builder to apply this expression to
+     */
+    public abstract void applyToBuilder(ExpressionSpecBuilder builder);
+
     @Override
     public abstract String toString();
 }

src/main/java/com/github/fge/jsonpatch/JsonPathToAttributePath.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2016, Alexander Patrikalakis ([email protected])
+ * Copyright (c) 2015, Daisuke Miyamoto ([email protected])
+ *
+ * This software is dual-licensed under:
+ *
+ * - the Lesser General Public License (LGPL) version 3.0 or, at your option, any
+ *   later version;
+ * - the Apache Software License (ASL) version 2.0.
+ *
+ * The text of this file and of both licenses is available at the root of this
+ * project or, if you have the jar distribution, in directory META-INF/, under
+ * the names LGPL-3.0.txt and ASL-2.0.txt respectively.
+ *
+ * Direct link to the sources:
+ *
+ * - LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
+ * - ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
+ */
+package com.github.fge.jsonpatch;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.github.fge.jackson.jsonpointer.JsonPointer;
+import com.github.fge.jackson.jsonpointer.TokenResolver;
+import com.google.common.base.Function;
+import com.google.common.base.Joiner;
+
+public class JsonPathToAttributePath implements Function<JsonPointer, String> {
+	
+	private static Pattern ARRAY_PATTERN = Pattern.compile("(0|[1-9][0-9]+)");
+	
+	
+	@Override
+	public String apply(JsonPointer pointer) {
+		List<String> elements = new ArrayList<String>();
+		for (TokenResolver<JsonNode> tokenResolver : pointer) {
+			String token = tokenResolver.getToken().getRaw();
+			if (ARRAY_PATTERN.matcher(token).matches()) {
+				String last = elements.get(elements.size() - 1);
+				elements.set(elements.size() - 1, String.format("%s[%s]", last, token));
+			} else {
+				elements.add(token);
+			}
+		}
+		
+		return Joiner.on(".").join(elements);
+	}
+}