diff --git a/.gitignore b/.gitignore
index 6ab3f7a5..7f4b61fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,5 @@ vendor/
.idea
# Dependency directories
node_modules/
+# Ignore Gradle build output directory
+build
diff --git a/asset-transfer-basic/chaincode-java/.gitattributes b/asset-transfer-basic/chaincode-java/.gitattributes
new file mode 100644
index 00000000..00a51aff
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/.gitattributes
@@ -0,0 +1,6 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# These are explicitly windows files and should use crlf
+*.bat text eol=crlf
+
diff --git a/asset-transfer-basic/chaincode-java/build.gradle b/asset-transfer-basic/chaincode-java/build.gradle
new file mode 100644
index 00000000..5f90c5ac
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/build.gradle
@@ -0,0 +1,75 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+plugins {
+ id 'application'
+ id 'checkstyle'
+ id 'jacoco'
+}
+
+group 'org.hyperledger.fabric.samples'
+version '1.0-SNAPSHOT'
+
+dependencies {
+
+ compileOnly 'org.hyperledger.fabric-chaincode-java:fabric-chaincode-shim:2.+'
+ implementation 'com.owlike:genson:1.5'
+ testImplementation 'org.hyperledger.fabric-chaincode-java:fabric-chaincode-shim:2.+'
+ testImplementation 'org.junit.jupiter:junit-jupiter:5.4.2'
+ testImplementation 'org.assertj:assertj-core:3.11.1'
+ testImplementation 'org.mockito:mockito-core:2.+'
+}
+
+repositories {
+ maven {
+ url "https://hyperledger.jfrog.io/hyperledger/fabric-maven"
+ }
+ jcenter()
+ maven {
+ url 'https://jitpack.io'
+ }
+}
+
+application {
+ mainClass = 'org.hyperledger.fabric.contract.ContractRouter'
+}
+
+checkstyle {
+ toolVersion '8.21'
+ configFile file("config/checkstyle/checkstyle.xml")
+}
+
+checkstyleMain {
+ source ='src/main/java'
+}
+
+checkstyleTest {
+ source ='src/test/java'
+}
+
+jacocoTestReport {
+ dependsOn test
+}
+
+jacocoTestCoverageVerification {
+ violationRules {
+ rule {
+ limit {
+ minimum = 0.9
+ }
+ }
+ }
+
+ finalizedBy jacocoTestReport
+}
+
+test {
+ useJUnitPlatform()
+ testLogging {
+ events "passed", "skipped", "failed"
+ }
+}
+
+check.dependsOn jacocoTestCoverageVerification
+installDist.dependsOn check
diff --git a/asset-transfer-basic/chaincode-java/config/checkstyle/checkstyle.xml b/asset-transfer-basic/chaincode-java/config/checkstyle/checkstyle.xml
new file mode 100644
index 00000000..acd5df44
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/config/checkstyle/checkstyle.xml
@@ -0,0 +1,171 @@
+
+
+
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diff --git a/asset-transfer-basic/chaincode-java/config/checkstyle/suppressions.xml b/asset-transfer-basic/chaincode-java/config/checkstyle/suppressions.xml
new file mode 100644
index 00000000..8c44b0a0
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/config/checkstyle/suppressions.xml
@@ -0,0 +1,9 @@
+
+
+
+
+
+
+
diff --git a/asset-transfer-basic/chaincode-java/gradle/wrapper/gradle-wrapper.jar b/asset-transfer-basic/chaincode-java/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..5c2d1cf0
Binary files /dev/null and b/asset-transfer-basic/chaincode-java/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/asset-transfer-basic/chaincode-java/gradle/wrapper/gradle-wrapper.properties b/asset-transfer-basic/chaincode-java/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..bb8b2fc2
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/asset-transfer-basic/chaincode-java/gradlew b/asset-transfer-basic/chaincode-java/gradlew
new file mode 100755
index 00000000..83f2acfd
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/gradlew
@@ -0,0 +1,188 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 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
+#
+# https://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.
+#
+
+##############################################################################
+##
+## Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+ ls=`ls -ld "$PRG"`
+ link=`expr "$ls" : '.*-> \(.*\)$'`
+ if expr "$link" : '/.*' > /dev/null; then
+ PRG="$link"
+ else
+ PRG=`dirname "$PRG"`"/$link"
+ fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+ echo "$*"
+}
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+ CYGWIN* )
+ cygwin=true
+ ;;
+ Darwin* )
+ darwin=true
+ ;;
+ MINGW* )
+ msys=true
+ ;;
+ NONSTOP* )
+ nonstop=true
+ ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD="$JAVA_HOME/jre/sh/java"
+ else
+ JAVACMD="$JAVA_HOME/bin/java"
+ fi
+ if [ ! -x "$JAVACMD" ] ; then
+ die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD="java"
+ which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+ MAX_FD_LIMIT=`ulimit -H -n`
+ if [ $? -eq 0 ] ; then
+ if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+ MAX_FD="$MAX_FD_LIMIT"
+ fi
+ ulimit -n $MAX_FD
+ if [ $? -ne 0 ] ; then
+ warn "Could not set maximum file descriptor limit: $MAX_FD"
+ fi
+ else
+ warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+ fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+ GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+ APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+ CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+ JAVACMD=`cygpath --unix "$JAVACMD"`
+
+ # We build the pattern for arguments to be converted via cygpath
+ ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+ SEP=""
+ for dir in $ROOTDIRSRAW ; do
+ ROOTDIRS="$ROOTDIRS$SEP$dir"
+ SEP="|"
+ done
+ OURCYGPATTERN="(^($ROOTDIRS))"
+ # Add a user-defined pattern to the cygpath arguments
+ if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+ OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+ fi
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ i=0
+ for arg in "$@" ; do
+ CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+ CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
+
+ if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
+ eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+ else
+ eval `echo args$i`="\"$arg\""
+ fi
+ i=$((i+1))
+ done
+ case $i in
+ (0) set -- ;;
+ (1) set -- "$args0" ;;
+ (2) set -- "$args0" "$args1" ;;
+ (3) set -- "$args0" "$args1" "$args2" ;;
+ (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+ (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+ (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+ (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+ (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+ (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+ esac
+fi
+
+# Escape application args
+save () {
+ for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+ echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+ cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/asset-transfer-basic/chaincode-java/gradlew.bat b/asset-transfer-basic/chaincode-java/gradlew.bat
new file mode 100644
index 00000000..9618d8d9
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/asset-transfer-basic/chaincode-java/settings.gradle b/asset-transfer-basic/chaincode-java/settings.gradle
new file mode 100644
index 00000000..2633c4b9
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/settings.gradle
@@ -0,0 +1,5 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+rootProject.name = 'basic'
diff --git a/asset-transfer-basic/chaincode-java/src/main/java/org/hyperledger/fabric/samples/assettransfer/Asset.java b/asset-transfer-basic/chaincode-java/src/main/java/org/hyperledger/fabric/samples/assettransfer/Asset.java
new file mode 100644
index 00000000..803f22fb
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/src/main/java/org/hyperledger/fabric/samples/assettransfer/Asset.java
@@ -0,0 +1,93 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.hyperledger.fabric.samples.assettransfer;
+
+import java.util.Objects;
+
+import org.hyperledger.fabric.contract.annotation.DataType;
+import org.hyperledger.fabric.contract.annotation.Property;
+
+import com.owlike.genson.annotation.JsonProperty;
+
+@DataType()
+public final class Asset {
+
+ @Property()
+ private final String assetID;
+
+ @Property()
+ private final String color;
+
+ @Property()
+ private final int size;
+
+ @Property()
+ private final String owner;
+
+ @Property()
+ private final int appraisedValue;
+
+ public String getAssetID() {
+ return assetID;
+ }
+
+ public String getColor() {
+ return color;
+ }
+
+ public int getSize() {
+ return size;
+ }
+
+ public String getOwner() {
+ return owner;
+ }
+
+ public int getAppraisedValue() {
+ return appraisedValue;
+ }
+
+ public Asset(@JsonProperty("assetID") final String assetID, @JsonProperty("color") final String color,
+ @JsonProperty("size") final int size, @JsonProperty("owner") final String owner,
+ @JsonProperty("appraisedValue") final int appraisedValue) {
+ this.assetID = assetID;
+ this.color = color;
+ this.size = size;
+ this.owner = owner;
+ this.appraisedValue = appraisedValue;
+ }
+
+ @Override
+ public boolean equals(final Object obj) {
+ if (this == obj) {
+ return true;
+ }
+
+ if ((obj == null) || (getClass() != obj.getClass())) {
+ return false;
+ }
+
+ Asset other = (Asset) obj;
+
+ return Objects.deepEquals(
+ new String[] {getAssetID(), getColor(), getOwner()},
+ new String[] {other.getAssetID(), other.getColor(), other.getOwner()})
+ &&
+ Objects.deepEquals(
+ new int[] {getSize(), getAppraisedValue()},
+ new int[] {other.getSize(), other.getAppraisedValue()});
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(getAssetID(), getColor(), getSize(), getOwner(), getAppraisedValue());
+ }
+
+ @Override
+ public String toString() {
+ return this.getClass().getSimpleName() + "@" + Integer.toHexString(hashCode()) + " [assetID=" + assetID + ", color="
+ + color + ", size=" + size + ", owner=" + owner + ", appraisedValue=" + appraisedValue + "]";
+ }
+}
diff --git a/asset-transfer-basic/chaincode-java/src/main/java/org/hyperledger/fabric/samples/assettransfer/AssetTransfer.java b/asset-transfer-basic/chaincode-java/src/main/java/org/hyperledger/fabric/samples/assettransfer/AssetTransfer.java
new file mode 100644
index 00000000..465d4694
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/src/main/java/org/hyperledger/fabric/samples/assettransfer/AssetTransfer.java
@@ -0,0 +1,236 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.hyperledger.fabric.samples.assettransfer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.hyperledger.fabric.contract.Context;
+import org.hyperledger.fabric.contract.ContractInterface;
+import org.hyperledger.fabric.contract.annotation.Contact;
+import org.hyperledger.fabric.contract.annotation.Contract;
+import org.hyperledger.fabric.contract.annotation.Default;
+import org.hyperledger.fabric.contract.annotation.Info;
+import org.hyperledger.fabric.contract.annotation.License;
+import org.hyperledger.fabric.contract.annotation.Transaction;
+import org.hyperledger.fabric.shim.ChaincodeException;
+import org.hyperledger.fabric.shim.ChaincodeStub;
+import org.hyperledger.fabric.shim.ledger.KeyValue;
+import org.hyperledger.fabric.shim.ledger.QueryResultsIterator;
+
+import com.owlike.genson.Genson;
+
+@Contract(
+ name = "basic",
+ info = @Info(
+ title = "Asset Transfer",
+ description = "The hyperlegendary asset transfer",
+ version = "0.0.1-SNAPSHOT",
+ license = @License(
+ name = "Apache 2.0 License",
+ url = "http://www.apache.org/licenses/LICENSE-2.0.html"),
+ contact = @Contact(
+ email = "a.transfer@example.com",
+ name = "Adrian Transfer",
+ url = "https://hyperledger.example.com")))
+@Default
+public final class AssetTransfer implements ContractInterface {
+
+ private final Genson genson = new Genson();
+
+ private enum AssetTransferErrors {
+ ASSET_NOT_FOUND,
+ ASSET_ALREADY_EXISTS
+ }
+
+ /**
+ * Creates some initial assets on the ledger.
+ *
+ * @param ctx the transaction context
+ */
+ @Transaction(intent = Transaction.TYPE.SUBMIT)
+ public void InitLedger(final Context ctx) {
+ ChaincodeStub stub = ctx.getStub();
+
+ CreateAsset(ctx, "asset1", "blue", 5, "Tomoko", 300);
+ CreateAsset(ctx, "asset2", "red", 5, "Brad", 400);
+ CreateAsset(ctx, "asset3", "green", 10, "Jin Soo", 500);
+ CreateAsset(ctx, "asset4", "yellow", 10, "Max", 600);
+ CreateAsset(ctx, "asset5", "black", 15, "Adrian", 700);
+ CreateAsset(ctx, "asset6", "white", 15, "Michel", 700);
+
+ }
+
+ /**
+ * Creates a new asset on the ledger.
+ *
+ * @param ctx the transaction context
+ * @param assetID the ID of the new asset
+ * @param color the color of the new asset
+ * @param size the size for the new asset
+ * @param owner the owner of the new asset
+ * @param appraisedValue the appraisedValue of the new asset
+ * @return the created asset
+ */
+ @Transaction(intent = Transaction.TYPE.SUBMIT)
+ public Asset CreateAsset(final Context ctx, final String assetID, final String color, final int size,
+ final String owner, final int appraisedValue) {
+ ChaincodeStub stub = ctx.getStub();
+
+ if (AssetExists(ctx, assetID)) {
+ String errorMessage = String.format("Asset %s already exists", assetID);
+ System.out.println(errorMessage);
+ throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_ALREADY_EXISTS.toString());
+ }
+
+ Asset asset = new Asset(assetID, color, size, owner, appraisedValue);
+ String assetJSON = genson.serialize(asset);
+ stub.putStringState(assetID, assetJSON);
+
+ return asset;
+ }
+
+ /**
+ * Retrieves an asset with the specified ID from the ledger.
+ *
+ * @param ctx the transaction context
+ * @param assetID the ID of the asset
+ * @return the asset found on the ledger if there was one
+ */
+ @Transaction(intent = Transaction.TYPE.EVALUATE)
+ public Asset ReadAsset(final Context ctx, final String assetID) {
+ ChaincodeStub stub = ctx.getStub();
+ String assetJSON = stub.getStringState(assetID);
+
+ if (assetJSON == null || assetJSON.isEmpty()) {
+ String errorMessage = String.format("Asset %s does not exist", assetID);
+ System.out.println(errorMessage);
+ throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_NOT_FOUND.toString());
+ }
+
+ Asset asset = genson.deserialize(assetJSON, Asset.class);
+ return asset;
+ }
+
+ /**
+ * Updates the properties of an asset on the ledger.
+ *
+ * @param ctx the transaction context
+ * @param assetID the ID of the asset being updated
+ * @param color the color of the asset being updated
+ * @param size the size of the asset being updated
+ * @param owner the owner of the asset being updated
+ * @param appraisedValue the appraisedValue of the asset being updated
+ * @return the transferred asset
+ */
+ @Transaction(intent = Transaction.TYPE.SUBMIT)
+ public Asset UpdateAsset(final Context ctx, final String assetID, final String color, final int size,
+ final String owner, final int appraisedValue) {
+ ChaincodeStub stub = ctx.getStub();
+
+ if (!AssetExists(ctx, assetID)) {
+ String errorMessage = String.format("Asset %s does not exist", assetID);
+ System.out.println(errorMessage);
+ throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_NOT_FOUND.toString());
+ }
+
+ Asset newAsset = new Asset(assetID, color, size, owner, appraisedValue);
+ String newAssetJSON = genson.serialize(newAsset);
+ stub.putStringState(assetID, newAssetJSON);
+
+ return newAsset;
+ }
+
+ /**
+ * Deletes asset on the ledger.
+ *
+ * @param ctx the transaction context
+ * @param assetID the ID of the asset being deleted
+ */
+ @Transaction(intent = Transaction.TYPE.SUBMIT)
+ public void DeleteAsset(final Context ctx, final String assetID) {
+ ChaincodeStub stub = ctx.getStub();
+
+ if (!AssetExists(ctx, assetID)) {
+ String errorMessage = String.format("Asset %s does not exist", assetID);
+ System.out.println(errorMessage);
+ throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_NOT_FOUND.toString());
+ }
+
+ stub.delState(assetID);
+ }
+
+ /**
+ * Checks the existence of the asset on the ledger
+ *
+ * @param ctx the transaction context
+ * @param assetID the ID of the asset
+ * @return boolean indicating the existence of the asset
+ */
+ @Transaction(intent = Transaction.TYPE.EVALUATE)
+ public boolean AssetExists(final Context ctx, final String assetID) {
+ ChaincodeStub stub = ctx.getStub();
+ String assetJSON = stub.getStringState(assetID);
+
+ return (assetJSON != null && !assetJSON.isEmpty());
+ }
+
+ /**
+ * Changes the owner of a asset on the ledger.
+ *
+ * @param ctx the transaction context
+ * @param assetID the ID of the asset being transferred
+ * @param newOwner the new owner
+ * @return the updated asset
+ */
+ @Transaction(intent = Transaction.TYPE.SUBMIT)
+ public Asset TransferAsset(final Context ctx, final String assetID, final String newOwner) {
+ ChaincodeStub stub = ctx.getStub();
+ String assetJSON = stub.getStringState(assetID);
+
+ if (assetJSON == null || assetJSON.isEmpty()) {
+ String errorMessage = String.format("Asset %s does not exist", assetID);
+ System.out.println(errorMessage);
+ throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_NOT_FOUND.toString());
+ }
+
+ Asset asset = genson.deserialize(assetJSON, Asset.class);
+
+ Asset newAsset = new Asset(asset.getAssetID(), asset.getColor(), asset.getSize(), newOwner, asset.getAppraisedValue());
+ String newAssetJSON = genson.serialize(newAsset);
+ stub.putStringState(assetID, newAssetJSON);
+
+ return newAsset;
+ }
+
+ /**
+ * Retrieves all assets from the ledger.
+ *
+ * @param ctx the transaction context
+ * @return array of assets found on the ledger
+ */
+ @Transaction(intent = Transaction.TYPE.EVALUATE)
+ public String GetAllAssets(final Context ctx) {
+ ChaincodeStub stub = ctx.getStub();
+
+ List queryResults = new ArrayList();
+
+ // To retrieve all assets from the ledger use getStateByRange with empty startKey & endKey.
+ // Giving empty startKey & endKey is interpreted as all the keys from beginning to end.
+ // As another example, if you use startKey = 'asset0', endKey = 'asset9' ,
+ // then getStateByRange will retrieve asset with keys between asset0 (inclusive) and asset9 (exclusive) in lexical order.
+ QueryResultsIterator results = stub.getStateByRange("", "");
+
+ for (KeyValue result: results) {
+ Asset asset = genson.deserialize(result.getStringValue(), Asset.class);
+ queryResults.add(asset);
+ System.out.println(asset.toString());
+ }
+
+ final String response = genson.serialize(queryResults);
+
+ return response;
+ }
+}
diff --git a/asset-transfer-basic/chaincode-java/src/test/java/org/hyperledger/fabric/samples/assettransfer/AssetTest.java b/asset-transfer-basic/chaincode-java/src/test/java/org/hyperledger/fabric/samples/assettransfer/AssetTest.java
new file mode 100644
index 00000000..7da94caa
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/src/test/java/org/hyperledger/fabric/samples/assettransfer/AssetTest.java
@@ -0,0 +1,74 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.hyperledger.fabric.samples.assettransfer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+public final class AssetTest {
+
+ @Nested
+ class Equality {
+
+ @Test
+ public void isReflexive() {
+ Asset asset = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+ assertThat(asset).isEqualTo(asset);
+ }
+
+ @Test
+ public void isSymmetric() {
+ Asset assetA = new Asset("asset1", "Blue", 20, "Guy", 100);
+ Asset assetB = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+ assertThat(assetA).isEqualTo(assetB);
+ assertThat(assetB).isEqualTo(assetA);
+ }
+
+ @Test
+ public void isTransitive() {
+ Asset assetA = new Asset("asset1", "Blue", 20, "Guy", 100);
+ Asset assetB = new Asset("asset1", "Blue", 20, "Guy", 100);
+ Asset assetC = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+ assertThat(assetA).isEqualTo(assetB);
+ assertThat(assetB).isEqualTo(assetC);
+ assertThat(assetA).isEqualTo(assetC);
+ }
+
+ @Test
+ public void handlesInequality() {
+ Asset assetA = new Asset("asset1", "Blue", 20, "Guy", 100);
+ Asset assetB = new Asset("asset2", "Red", 40, "Lady", 200);
+
+ assertThat(assetA).isNotEqualTo(assetB);
+ }
+
+ @Test
+ public void handlesOtherObjects() {
+ Asset assetA = new Asset("asset1", "Blue", 20, "Guy", 100);
+ String assetB = "not a asset";
+
+ assertThat(assetA).isNotEqualTo(assetB);
+ }
+
+ @Test
+ public void handlesNull() {
+ Asset asset = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+ assertThat(asset).isNotEqualTo(null);
+ }
+ }
+
+ @Test
+ public void toStringIdentifiesAsset() {
+ Asset asset = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+ assertThat(asset.toString()).isEqualTo("Asset@e04f6c53 [assetID=asset1, color=Blue, size=20, owner=Guy, appraisedValue=100]");
+ }
+}
diff --git a/asset-transfer-basic/chaincode-java/src/test/java/org/hyperledger/fabric/samples/assettransfer/AssetTransferTest.java b/asset-transfer-basic/chaincode-java/src/test/java/org/hyperledger/fabric/samples/assettransfer/AssetTransferTest.java
new file mode 100644
index 00000000..cbbb172f
--- /dev/null
+++ b/asset-transfer-basic/chaincode-java/src/test/java/org/hyperledger/fabric/samples/assettransfer/AssetTransferTest.java
@@ -0,0 +1,305 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.hyperledger.fabric.samples.assettransfer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.ThrowableAssert.catchThrowable;
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verifyZeroInteractions;
+import static org.mockito.Mockito.when;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.hyperledger.fabric.contract.Context;
+import org.hyperledger.fabric.shim.ChaincodeException;
+import org.hyperledger.fabric.shim.ChaincodeStub;
+import org.hyperledger.fabric.shim.ledger.KeyValue;
+import org.hyperledger.fabric.shim.ledger.QueryResultsIterator;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.mockito.InOrder;
+
+public final class AssetTransferTest {
+
+ private final class MockKeyValue implements KeyValue {
+
+ private final String key;
+ private final String value;
+
+ MockKeyValue(final String key, final String value) {
+ super();
+ this.key = key;
+ this.value = value;
+ }
+
+ @Override
+ public String getKey() {
+ return this.key;
+ }
+
+ @Override
+ public String getStringValue() {
+ return this.value;
+ }
+
+ @Override
+ public byte[] getValue() {
+ return this.value.getBytes();
+ }
+
+ }
+
+ private final class MockAssetResultsIterator implements QueryResultsIterator {
+
+ private final List assetList;
+
+ MockAssetResultsIterator() {
+ super();
+
+ assetList = new ArrayList();
+
+ assetList.add(new MockKeyValue("asset1",
+ "{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 5, \"owner\": \"Tomoko\", \"appraisedValue\": 300 }"));
+ assetList.add(new MockKeyValue("asset2",
+ "{ \"assetID\": \"asset2\", \"color\": \"red\", \"size\": 5,\"owner\": \"Brad\", \"appraisedValue\": 400 }"));
+ assetList.add(new MockKeyValue("asset3",
+ "{ \"assetID\": \"asset3\", \"color\": \"green\", \"size\": 10,\"owner\": \"Jin Soo\", \"appraisedValue\": 500 }"));
+ assetList.add(new MockKeyValue("asset4",
+ "{ \"assetID\": \"asset4\", \"color\": \"yellow\", \"size\": 10,\"owner\": \"Max\", \"appraisedValue\": 600 }"));
+ assetList.add(new MockKeyValue("asset5",
+ "{ \"assetID\": \"asset5\", \"color\": \"black\", \"size\": 15,\"owner\": \"Adrian\", \"appraisedValue\": 700 }"));
+ assetList.add(new MockKeyValue("asset6",
+ "{ \"assetID\": \"asset6\", \"color\": \"white\", \"size\": 15,\"owner\": \"Michel\", \"appraisedValue\": 800 }"));
+ }
+
+ @Override
+ public Iterator iterator() {
+ return assetList.iterator();
+ }
+
+ @Override
+ public void close() throws Exception {
+ // do nothing
+ }
+
+ }
+
+ @Test
+ public void invokeUnknownTransaction() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+
+ Throwable thrown = catchThrowable(() -> {
+ contract.unknownTransaction(ctx);
+ });
+
+ assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+ .hasMessage("Undefined contract method called");
+ assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo(null);
+
+ verifyZeroInteractions(ctx);
+ }
+
+ @Nested
+ class InvokeReadAssetTransaction {
+
+ @Test
+ public void whenAssetExists() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1"))
+ .thenReturn("{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 5, \"owner\": \"Tomoko\", \"appraisedValue\": 300 }");
+
+ Asset asset = contract.ReadAsset(ctx, "asset1");
+
+ assertThat(asset).isEqualTo(new Asset("asset1", "blue", 5, "Tomoko", 300));
+ }
+
+ @Test
+ public void whenAssetDoesNotExist() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1")).thenReturn("");
+
+ Throwable thrown = catchThrowable(() -> {
+ contract.ReadAsset(ctx, "asset1");
+ });
+
+ assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+ .hasMessage("Asset asset1 does not exist");
+ assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_NOT_FOUND".getBytes());
+ }
+ }
+
+ @Test
+ void invokeInitLedgerTransaction() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+
+ contract.InitLedger(ctx);
+
+ InOrder inOrder = inOrder(stub);
+ inOrder.verify(stub).putStringState("asset1", "{\"appraisedValue\":300,\"assetID\":\"asset1\",\"color\":\"blue\",\"owner\":\"Tomoko\",\"size\":5}");
+ inOrder.verify(stub).putStringState("asset2", "{\"appraisedValue\":400,\"assetID\":\"asset2\",\"color\":\"red\",\"owner\":\"Brad\",\"size\":5}");
+ inOrder.verify(stub).putStringState("asset3", "{\"appraisedValue\":500,\"assetID\":\"asset3\",\"color\":\"green\",\"owner\":\"Jin Soo\",\"size\":10}");
+ inOrder.verify(stub).putStringState("asset4", "{\"appraisedValue\":600,\"assetID\":\"asset4\",\"color\":\"yellow\",\"owner\":\"Max\",\"size\":10}");
+ inOrder.verify(stub).putStringState("asset5", "{\"appraisedValue\":700,\"assetID\":\"asset5\",\"color\":\"black\",\"owner\":\"Adrian\",\"size\":15}");
+
+ }
+
+ @Nested
+ class InvokeCreateAssetTransaction {
+
+ @Test
+ public void whenAssetExists() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1"))
+ .thenReturn("{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 5, \"owner\": \"Tomoko\", \"appraisedValue\": 300 }");
+
+ Throwable thrown = catchThrowable(() -> {
+ contract.CreateAsset(ctx, "asset1", "blue", 45, "Siobhán", 60);
+ });
+
+ assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+ .hasMessage("Asset asset1 already exists");
+ assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_ALREADY_EXISTS".getBytes());
+ }
+
+ @Test
+ public void whenAssetDoesNotExist() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1")).thenReturn("");
+
+ Asset asset = contract.CreateAsset(ctx, "asset1", "blue", 45, "Siobhán", 60);
+
+ assertThat(asset).isEqualTo(new Asset("asset1", "blue", 45, "Siobhán", 60));
+ }
+ }
+
+ @Test
+ void invokeGetAllAssetsTransaction() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStateByRange("", "")).thenReturn(new MockAssetResultsIterator());
+
+ String assets = contract.GetAllAssets(ctx);
+
+ assertThat(assets).isEqualTo("[{\"appraisedValue\":300,\"assetID\":\"asset1\",\"color\":\"blue\",\"owner\":\"Tomoko\",\"size\":5},"
+ + "{\"appraisedValue\":400,\"assetID\":\"asset2\",\"color\":\"red\",\"owner\":\"Brad\",\"size\":5},"
+ + "{\"appraisedValue\":500,\"assetID\":\"asset3\",\"color\":\"green\",\"owner\":\"Jin Soo\",\"size\":10},"
+ + "{\"appraisedValue\":600,\"assetID\":\"asset4\",\"color\":\"yellow\",\"owner\":\"Max\",\"size\":10},"
+ + "{\"appraisedValue\":700,\"assetID\":\"asset5\",\"color\":\"black\",\"owner\":\"Adrian\",\"size\":15},"
+ + "{\"appraisedValue\":800,\"assetID\":\"asset6\",\"color\":\"white\",\"owner\":\"Michel\",\"size\":15}]");
+
+ }
+
+ @Nested
+ class TransferAssetTransaction {
+
+ @Test
+ public void whenAssetExists() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1"))
+ .thenReturn("{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 5, \"owner\": \"Tomoko\", \"appraisedValue\": 300 }");
+
+ Asset asset = contract.TransferAsset(ctx, "asset1", "Dr Evil");
+
+ assertThat(asset).isEqualTo(new Asset("asset1", "blue", 5, "Dr Evil", 300));
+ }
+
+ @Test
+ public void whenAssetDoesNotExist() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1")).thenReturn("");
+
+ Throwable thrown = catchThrowable(() -> {
+ contract.TransferAsset(ctx, "asset1", "Dr Evil");
+ });
+
+ assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+ .hasMessage("Asset asset1 does not exist");
+ assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_NOT_FOUND".getBytes());
+ }
+ }
+
+ @Nested
+ class UpdateAssetTransaction {
+
+ @Test
+ public void whenAssetExists() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1"))
+ .thenReturn("{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 45, \"owner\": \"Arturo\", \"appraisedValue\": 60 }");
+
+ Asset asset = contract.UpdateAsset(ctx, "asset1", "pink", 45, "Arturo", 600);
+
+ assertThat(asset).isEqualTo(new Asset("asset1", "pink", 45, "Arturo", 600));
+ }
+
+ @Test
+ public void whenAssetDoesNotExist() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1")).thenReturn("");
+
+ Throwable thrown = catchThrowable(() -> {
+ contract.TransferAsset(ctx, "asset1", "Alex");
+ });
+
+ assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+ .hasMessage("Asset asset1 does not exist");
+ assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_NOT_FOUND".getBytes());
+ }
+ }
+
+ @Nested
+ class DeleteAssetTransaction {
+
+ @Test
+ public void whenAssetDoesNotExist() {
+ AssetTransfer contract = new AssetTransfer();
+ Context ctx = mock(Context.class);
+ ChaincodeStub stub = mock(ChaincodeStub.class);
+ when(ctx.getStub()).thenReturn(stub);
+ when(stub.getStringState("asset1")).thenReturn("");
+
+ Throwable thrown = catchThrowable(() -> {
+ contract.DeleteAsset(ctx, "asset1");
+ });
+
+ assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+ .hasMessage("Asset asset1 does not exist");
+ assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_NOT_FOUND".getBytes());
+ }
+ }
+}
diff --git a/ci/azure-pipelines.yml b/ci/azure-pipelines.yml
index 9875d0da..759d36a3 100644
--- a/ci/azure-pipelines.yml
+++ b/ci/azure-pipelines.yml
@@ -84,6 +84,10 @@ jobs:
DIRECTORY: asset-transfer-basic
LANGUAGE: go
TYPE: chaincode
+ Basic-Chaincode-Java:
+ DIRECTORY: asset-transfer-basic
+ LANGUAGE: java
+ TYPE: chaincode
Basic-Chaincode-Javascript:
DIRECTORY: asset-transfer-basic
LANGUAGE: javascript
@@ -126,6 +130,9 @@ jobs:
Basic-Go:
CHAINCODE_NAME: basic
CHAINCODE_LANGUAGE: go
+ Basic-Java:
+ CHAINCODE_NAME: basic
+ CHAINCODE_LANGUAGE: java
Basic-Javascript:
CHAINCODE_NAME: basic
CHAINCODE_LANGUAGE: javascript
diff --git a/ci/scripts/lint.sh b/ci/scripts/lint.sh
index 9e8fd4e3..275b4d62 100755
--- a/ci/scripts/lint.sh
+++ b/ci/scripts/lint.sh
@@ -27,6 +27,10 @@ if [[ "${LANGUAGE}" == "go" ]]; then
print "The following files contain import errors, please run 'goimports -l -w ' to fix these issues:"
echo "${output}"
fi
+elif [[ "${LANGUAGE}" == "java" ]]; then
+ cd "${DIRECTORY}/${TYPE}-${LANGUAGE}"
+ print "Running Gradle Build"
+ ./gradlew build
elif [[ "${LANGUAGE}" == "javascript" ]]; then
npm install -g eslint
cd "${DIRECTORY}/${TYPE}-${LANGUAGE}"