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[MNG-6776] Inconsistent list of parameters for MojoDescriptor (#584) #1361

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Jan 6, 2024
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[MNG-6776] Inconsistent list of parameters for MojoDescriptor (#584) #1361

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79 changes: 23 additions & 56 deletions maven-plugin-api/src/main/java/org/apache/maven/plugin/descriptor/MojoDescriptor.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,10 +18,11 @@
*/
package org.apache.maven.plugin.descriptor;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;

import org.apache.maven.plugin.Mojo;
import org.codehaus.plexus.component.repository.ComponentDescriptor;
Expand Down Expand Up @@ -51,9 +52,7 @@ public class MojoDescriptor extends ComponentDescriptor<Mojo> implements Cloneab

private static final String DEFAULT_LANGUAGE = "java";

private List<Parameter> parameters;

private Map<String, Parameter> parameterMap;
private final ArrayList<Parameter> parameters;
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/** By default, the execution strategy is "once-per-session" */
private String executionStrategy = SINGLE_PASS_EXEC_STRATEGY;
Expand Down Expand Up @@ -91,7 +90,7 @@ public class MojoDescriptor extends ComponentDescriptor<Mojo> implements Cloneab
private String deprecated;

/**
* Flags this Mojo to run it in a multi module way, i.e. aggregate the build with the set of projects listed as
* Flags this Mojo to run it in a multi-module way, i.e. aggregate the build with the set of projects listed as
* modules. By default, no need to aggregate the Maven project and its child modules
*/
private boolean aggregator = false;
Expand Down Expand Up @@ -140,6 +139,7 @@ public class MojoDescriptor extends ComponentDescriptor<Mojo> implements Cloneab
* Default constructor.
*/
public MojoDescriptor() {
this.parameters = new ArrayList<>();
setInstantiationStrategy(DEFAULT_INSTANTIATION_STRATEGY);
setComponentFactory(DEFAULT_LANGUAGE);
}
Expand Down Expand Up @@ -177,17 +177,19 @@ public void setDeprecated(String deprecated) {
}

/**
* @return the list of parameters
* @return the list of parameters copy. Any change to returned list is NOT reflected on this instance. To add
* parameters, use {@link #addParameter(Parameter)} method.
*/
public List<Parameter> getParameters() {
return parameters;
return new ArrayList<>(parameters);
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}

/**
* @param parameters the new list of parameters
* @throws DuplicateParameterException if any
*/
public void setParameters(List<Parameter> parameters) throws DuplicateParameterException {
this.parameters.clear();
for (Parameter parameter : parameters) {
addParameter(parameter);
}
Expand All @@ -198,31 +200,25 @@ public void setParameters(List<Parameter> parameters) throws DuplicateParameterE
* @throws DuplicateParameterException if any
*/
public void addParameter(Parameter parameter) throws DuplicateParameterException {
if (parameters != null && parameters.contains(parameter)) {
if (parameters.contains(parameter)) {
throw new DuplicateParameterException(parameter.getName()
+ " has been declared multiple times in mojo with goal: " + getGoal() + " (implementation: "
+ getImplementation() + ")");
}

if (parameters == null) {
parameters = new LinkedList<>();
}

parameters.add(parameter);
}

/**
* @return the list parameters as a Map
* @return the list parameters as a Map (keyed by {@link Parameter#getName()}) that is built from
* {@link #parameters} list on each call. In other words, the map returned is built on fly and is a copy.
* Any change to this map is NOT reflected on list and other way around!
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*/
public Map<String, Parameter> getParameterMap() {
if (parameterMap == null) {
parameterMap = new HashMap<>();

if (parameters != null) {
for (Parameter pd : parameters) {
parameterMap.put(pd.getName(), pd);
}
}
LinkedHashMap<String, Parameter> parameterMap = new LinkedHashMap<>();

for (Parameter pd : parameters) {
parameterMap.put(pd.getName(), pd);
}

return parameterMap;
Expand Down Expand Up @@ -321,14 +317,14 @@ public boolean requiresOnline() {
}

/**
* @return the binded phase name of the Mojo
* @return the bound phase name of the Mojo
*/
public String getPhase() {
return phase;
}

/**
* @param phase the new binded phase name of the Mojo
* @param phase the new bound phase name of the Mojo
*/
public void setPhase(String phase) {
this.phase = phase;
Expand Down Expand Up @@ -482,45 +478,16 @@ public boolean equals(Object object) {
if (object instanceof MojoDescriptor) {
MojoDescriptor other = (MojoDescriptor) object;

if (!compareObjects(getPluginDescriptor(), other.getPluginDescriptor())) {
return false;
}

return compareObjects(getGoal(), other.getGoal());
return Objects.equals(getPluginDescriptor(), other.getPluginDescriptor())
&& Objects.equals(getGoal(), other.getGoal());
}

return false;
}

private boolean compareObjects(Object first, Object second) {
if (first == second) {
return true;
}

if (first == null || second == null) {
return false;
}

return first.equals(second);
}

/** {@inheritDoc} */
public int hashCode() {
int result = 1;

String goal = getGoal();

if (goal != null) {
result += goal.hashCode();
}

PluginDescriptor pd = getPluginDescriptor();

if (pd != null) {
result -= pd.hashCode();
}

return result;
return Objects.hash(getGoal(), getPluginDescriptor());
}

/**
Expand Down
48 changes: 48 additions & 0 deletions maven-plugin-api/src/test/java/org/apache/maven/plugin/descriptor/MojoDescriptorTest.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,48 @@
/*
* 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.
*/
package org.apache.maven.plugin.descriptor;

import junit.framework.TestCase;

public class MojoDescriptorTest extends TestCase {

public void testGetParameterMap() throws DuplicateParameterException {
MojoDescriptor mojoDescriptor = new MojoDescriptor();
Parameter param1 = new Parameter();
param1.setName("param1");
param1.setDefaultValue("value1");
mojoDescriptor.addParameter(param1);

assertEquals(1, mojoDescriptor.getParameters().size());

assertEquals(
mojoDescriptor.getParameters().size(),
mojoDescriptor.getParameterMap().size());

Parameter param2 = new Parameter();
param2.setName("param2");
param2.setDefaultValue("value2");
mojoDescriptor.addParameter(param2);

assertEquals(2, mojoDescriptor.getParameters().size());
assertEquals(
mojoDescriptor.getParameters().size(),
mojoDescriptor.getParameterMap().size());
}
}