This is an automated email from the ASF dual-hosted git repository.
khmarbaise pushed a commit to branch MNG-6825
in repository https://gitbox.apache.org/repos/asf/maven.git
commit 833e61fd91688c0cc112f401c90ac128d7c445eb
Author: Karl Heinz Marbaise <khmarba...@apache.org>
AuthorDate: Mon Nov 25 20:13:38 2019 +0100
First step.
---
maven-artifact/pom.xml | 4 +-
maven-utils/pom.xml | 43 +++++++
.../java/org/apache/maven/utils/Precondition.java | 125 +++++++++++++++++++++
pom.xml | 1 +
4 files changed, 171 insertions(+), 2 deletions(-)
diff --git a/maven-artifact/pom.xml b/maven-artifact/pom.xml
index 336505b..9dd4fe9 100644
--- a/maven-artifact/pom.xml
+++ b/maven-artifact/pom.xml
@@ -38,8 +38,8 @@ under the License.
<artifactId>plexus-utils</artifactId>
</dependency>
<dependency>
- <groupId>org.apache.commons</groupId>
- <artifactId>commons-lang3</artifactId>
+ <groupId>org.apache.maven</groupId>
+ <artifactId>maven-utils</artifactId>
</dependency>
</dependencies>
diff --git a/maven-utils/pom.xml b/maven-utils/pom.xml
new file mode 100644
index 0000000..21e066d
--- /dev/null
+++ b/maven-utils/pom.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you 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.
+-->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd";>
+ <modelVersion>4.0.0</modelVersion>
+
+ <parent>
+ <groupId>org.apache.maven</groupId>
+ <artifactId>maven</artifactId>
+ <version>3.6.3-SNAPSHOT</version>
+ </parent>
+
+ <artifactId>maven-utils</artifactId>
+
+ <name>Maven Utils</name>
+
+ <dependencies>
+ <dependency>
+ <groupId>org.apiguardian</groupId>
+ <artifactId>apiguardian-api</artifactId>
+ <version>1.1.0</version>
+ </dependency>
+ </dependencies>
+</project>
diff --git a/maven-utils/src/main/java/org/apache/maven/utils/Precondition.java
b/maven-utils/src/main/java/org/apache/maven/utils/Precondition.java
new file mode 100644
index 0000000..73b50a1
--- /dev/null
+++ b/maven-utils/src/main/java/org/apache/maven/utils/Precondition.java
@@ -0,0 +1,125 @@
+package org.apache.maven.utils;
+
+import com.sun.tools.javac.util.StringUtils;
+import org.apiguardian.api.API;
+
+import java.util.List;
+
+import static org.apiguardian.api.API.Status.INTERNAL;
+
+/**
+ * Convenient utility methods for assertion of different conditions.
+ *
+ * @author Karl Heinz Marbaise
+ */
+@API( status = INTERNAL, since = "3.6.4" )
+public final class Precondition
+{
+ private Precondition()
+ {
+ // no-op
+ }
+
+ public static boolean notBlank(String str, String message)
+ {
+ for ( int i = 0; i < str.length(); i++ )
+ {
+ if ( !Character.isWhitespace( str.charAt( i ) ) )
+ {
+ return false;
+ }
+ }
+ throw new IllegalArgumentException( message );
+ }
+
+ /**
+ * assert that the given {@code obj} is not {@code null}.
+ *
+ * @param obj The instance which should be not {@code null}.
+ * @param message The message will be part of the exception.
+ * @return The supplied object as convenient.
+ */
+ public static < T > T requireNotNull(T obj, String message)
+ {
+ if ( obj == null )
+ throw new IllegalArgumentException( message );
+ return obj;
+ }
+
+ /**
+ * assert that the given {@code List<T>} is not {@code empty}.
+ *
+ * @param obj The instance which should be not {@code empty}.
+ * @param message The message will be part of the exception.
+ * @return The supplied object as convenient.
+ */
+ public static < T > List< T > requireNotEmpty(List< T > obj, String
message)
+ {
+ if ( obj.isEmpty() )
+ {
+ throw new IllegalArgumentException( message );
+ }
+ return obj;
+ }
+
+ /**
+ * assert that the given {@code longValue} is greater than {@code 0}.
+ *
+ * @param longValue The instance which should be not {@code null}
+ * and has to be greater than {@code 0}.
+ * @param message The message will be part of the exception.
+ * @return The supplied object as convenient.
+ */
+ public static Long requireGreaterThanZero(Long longValue, String message)
+ {
+ if ( longValue == null )
+ {
+ throw new IllegalArgumentException( message );
+ }
+
+ if ( longValue <= 0 )
+ {
+ throw new IllegalArgumentException( message );
+ }
+ return longValue;
+ }
+
+ /**
+ * assert that the given {@code integerValue} is greater than {@code 0}.
+ *
+ * @param integerValue The instance which should be not {@code null}
+ * and has to be greater than {@code 0}.
+ * @param message The message will be part of the exception.
+ * @return The supplied object as convenient.
+ */
+ public static Integer requireGreaterThanZero(Integer integerValue, String
message)
+ {
+ if ( integerValue == null )
+ {
+ throw new IllegalArgumentException( message );
+ }
+
+ if ( integerValue <= 0 )
+ {
+ throw new IllegalArgumentException( message );
+ }
+ return integerValue;
+ }
+
+ /**
+ * assert that the given {@code str} is not {@code null} and not {@code
empty}.
+ *
+ * @param str The str which should not be {@code null} and not be
empty.
+ * @param message The message for the exception in case of {@code null}.
+ * @return The supplied object as convenient.
+ */
+ public static String requireNotEmpty(String str, String message)
+ {
+ requireNotNull( str, message );
+ if ( StringUtils.isBlank( str ) )
+ {
+ throw new IllegalArgumentException( message );
+ }
+ return str;
+ }
+
diff --git a/pom.xml b/pom.xml
index ef2764d..c9ec5a3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -89,6 +89,7 @@ under the License.
<module>maven-settings</module>
<module>maven-settings-builder</module>
<module>maven-artifact</module>
+ <module>maven-utils</module>
<module>maven-resolver-provider</module>
<module>maven-repository-metadata</module>
<module>maven-slf4j-provider</module>
