/*
    * 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 java.util.HashMap;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.maven.plugin.Mojo;
  import org.codehaus.plexus.component.repository.ComponentDescriptor;
  import org.codehaus.plexus.configuration.PlexusConfiguration;
  import org.codehaus.plexus.configuration.xml.XmlPlexusConfiguration;
  
  /**
   * The bean containing the Mojo descriptor.<br>
   * For more information about the usage tag, have a look to:
   * <a href="https://maven.apache.org/developers/mojo-api-specification.html">
   * https://maven.apache.org/developers/mojo-api-specification.html</a>
   *
   * TODO is there a need for the delegation of MavenMojoDescriptor to this?
   * Why not just extend ComponentDescriptor here?
   */
  public class MojoDescriptor extends ComponentDescriptor<Mojo> implements Cloneable {
      /** The Plexus component type */
      public static final String MAVEN_PLUGIN = "maven-plugin";
  
      /** "once-per-session" execution strategy */
      public static final String SINGLE_PASS_EXEC_STRATEGY = "once-per-session";
  
      /** "always" execution strategy */
      public static final String MULTI_PASS_EXEC_STRATEGY = "always";
  
      private static final String DEFAULT_INSTANTIATION_STRATEGY = "per-lookup";
  
      private static final String DEFAULT_LANGUAGE = "java";
  
      private List<Parameter> parameters;
  
      private Map<String, Parameter> parameterMap;
  
      /** By default, the execution strategy is "once-per-session" */
      private String executionStrategy = SINGLE_PASS_EXEC_STRATEGY;
  
      /**
       * The goal name for the Mojo, that users will reference from the command line to execute the Mojo directly, or
       * inside a POM in order to provide Mojo-specific configuration.
       */
      private String goal;
  
      /**
       * Defines a default phase to bind a mojo execution to if the user does not explicitly set a phase in the POM.
       * <i>Note:</i> This will not automagically make a mojo run when the plugin declaration is added to the POM. It
       * merely enables the user to omit the <code>&lt;phase&gt;</code> element from the surrounding
       * <code>&lt;execution&gt;</code> element.
       */
      private String phase;
  
      /** Specify the version when the Mojo was added to the API. Similar to Javadoc since. */
      private String since;
  
      /** Reference the invocation phase of the Mojo. */
      private String executePhase;
  
      /** Reference the invocation goal of the Mojo. */
      private String executeGoal;
  
      /** Reference the invocation lifecycle of the Mojo. */
      private String executeLifecycle;
  
      /**
       * Description with reason of Mojo deprecation. Similar to Javadoc {@code @deprecated}.
       * This will trigger a warning when a user tries to use a Mojo marked as deprecated.
       */
      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
       * modules. By default, no need to aggregate the Maven project and its child modules
       */
      private boolean aggregator = false;
  
      // ----------------------------------------------------------------------
     //
     // ----------------------------------------------------------------------
 
     /** Specify the required dependencies in a specified scope */
     private String dependencyResolutionRequired = null;
 
     /**
      * The scope of (transitive) dependencies that should be collected but not resolved.
      * @since 3.0-alpha-3
      */
     private String dependencyCollectionRequired;
 
     /**  By default, the Mojo needs a Maven project to be executed */
     private boolean projectRequired = true;
 
     /**  By default, the Mojo is assumed to work offline as well */
     private boolean onlineRequired = false;
 
     /**  Plugin configuration */
     private PlexusConfiguration mojoConfiguration;
 
     /**  Plugin descriptor */
     private PluginDescriptor pluginDescriptor;
 
     /**  By default, the Mojo is inherited */
     private boolean inheritedByDefault = true;
 
     /**  By default, the Mojo cannot be invoked directly */
     private boolean directInvocationOnly = false;
 
     /**  By default, the Mojo don't need reports to run */
     private boolean requiresReports = false;
 
     /**
      * By default, mojos are not threadsafe
      * @since 3.0-beta-2
      */
     private boolean threadSafe = false;
 
     /**
      * Default constructor.
      */
     public MojoDescriptor() {
         setInstantiationStrategy(DEFAULT_INSTANTIATION_STRATEGY);
         setComponentFactory(DEFAULT_LANGUAGE);
     }
 
     // ----------------------------------------------------------------------
     //
     // ----------------------------------------------------------------------
 
     /**
      * @return the language of this Mojo, i.e. <code>java</code>
      */
     public String getLanguage() {
         return getComponentFactory();
     }
 
     /**
      * @param language the new language
      */
     public void setLanguage(String language) {
         setComponentFactory(language);
     }
 
     /**
      * @return Description with reason of a Mojo deprecation.
      */
     public String getDeprecated() {
         return deprecated;
     }
 
     /**
      * @param deprecated Description with reason of a Mojo deprecation.
      */
     public void setDeprecated(String deprecated) {
         this.deprecated = deprecated;
     }
 
     /**
      * @return the list of parameters
      */
     public List<Parameter> getParameters() {
         return parameters;
     }
 
     /**
      * @param parameters the new list of parameters
      * @throws DuplicateParameterException if any
      */
     public void setParameters(List<Parameter> parameters) throws DuplicateParameterException {
         for (Parameter parameter : parameters) {
             addParameter(parameter);
         }
     }
 
     /**
      * @param parameter add a new parameter
      * @throws DuplicateParameterException if any
      */
     public void addParameter(Parameter parameter) throws DuplicateParameterException {
         if (parameters != null && 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
      */
     public Map<String, Parameter> getParameterMap() {
         if (parameterMap == null) {
             parameterMap = new HashMap<>();
 
             if (parameters != null) {
                 for (Parameter pd : parameters) {
                     parameterMap.put(pd.getName(), pd);
                 }
             }
         }
 
         return parameterMap;
     }
 
     // ----------------------------------------------------------------------
     // Dependency requirement
     // ----------------------------------------------------------------------
 
     /**
      * @param requiresDependencyResolution the new required dependencies in a specified scope
      */
     public void setDependencyResolutionRequired(String requiresDependencyResolution) {
         this.dependencyResolutionRequired = requiresDependencyResolution;
     }
 
     public String getDependencyResolutionRequired() {
         return dependencyResolutionRequired;
     }
 
     /**
      * @return the required dependencies in a specified scope
      * TODO the name is not intelligible
      */
     @Deprecated
     public String isDependencyResolutionRequired() {
         return dependencyResolutionRequired;
     }
 
     /**
      * @since 3.0-alpha-3
      */
     public void setDependencyCollectionRequired(String requiresDependencyCollection) {
         this.dependencyCollectionRequired = requiresDependencyCollection;
     }
 
     /**
      * Gets the scope of (transitive) dependencies that should be collected. Dependency collection refers to the process
      * of calculating the complete dependency tree in terms of artifact coordinates. In contrast to dependency
      * resolution, this does not include the download of the files for the dependency artifacts. It is meant for mojos
      * that only want to analyze the set of transitive dependencies, in particular during early lifecycle phases where
      * full dependency resolution might fail due to projects which haven't been built yet.
      *
      * @return The scope of (transitive) dependencies that should be collected or {@code null} if none.
      * @since 3.0-alpha-3
      */
     public String getDependencyCollectionRequired() {
         return dependencyCollectionRequired;
     }
 
     // ----------------------------------------------------------------------
     // Project requirement
     // ----------------------------------------------------------------------
 
     /**
      * @param requiresProject <code>true</code> if the Mojo needs a Maven project to be executed, <code>false</code>
      * otherwise.
      */
     public void setProjectRequired(boolean requiresProject) {
         this.projectRequired = requiresProject;
     }
 
     /**
      * @return <code>true</code> if the Mojo needs a Maven project to be executed, <code>false</code> otherwise.
      */
     public boolean isProjectRequired() {
         return projectRequired;
     }
 
     // ----------------------------------------------------------------------
     // Online vs. Offline requirement
     // ----------------------------------------------------------------------
 
     /**
      * @param requiresOnline <code>true</code> if the Mojo is online, <code>false</code> otherwise.
      */
     public void setOnlineRequired(boolean requiresOnline) {
         this.onlineRequired = requiresOnline;
     }
 
     /**
      * @return <code>true</code> if the Mojo is online, <code>false</code> otherwise.
      */
     // blech! this isn't even intelligible as a method name. provided for
     // consistency...
     public boolean isOnlineRequired() {
         return onlineRequired;
     }
 
     /**
      * @return <code>true</code> if the Mojo is online, <code>false</code> otherwise.
      */
     // more english-friendly method...keep the code clean! :)
     public boolean requiresOnline() {
         return onlineRequired;
     }
 
     /**
      * @return the binded phase name of the Mojo
      */
     public String getPhase() {
         return phase;
     }
 
     /**
      * @param phase the new binded phase name of the Mojo
      */
     public void setPhase(String phase) {
         this.phase = phase;
     }
 
     /**
      * @return the version when the Mojo was added to the API
      */
     public String getSince() {
         return since;
     }
 
     /**
      * @param since the new version when the Mojo was added to the API
      */
     public void setSince(String since) {
         this.since = since;
     }
 
     /**
      * @return The goal name of the Mojo
      */
     public String getGoal() {
         return goal;
     }
 
     /**
      * @param goal The new goal name of the Mojo
      */
     public void setGoal(String goal) {
         this.goal = goal;
     }
 
     /**
      * @return the invocation phase of the Mojo
      */
     public String getExecutePhase() {
         return executePhase;
     }
 
     /**
      * @param executePhase the new invocation phase of the Mojo
      */
     public void setExecutePhase(String executePhase) {
         this.executePhase = executePhase;
     }
 
     /**
      * @return <code>true</code> if the Mojo uses <code>always</code> for the <code>executionStrategy</code>
      */
     public boolean alwaysExecute() {
         return MULTI_PASS_EXEC_STRATEGY.equals(executionStrategy);
     }
 
     /**
      * @return the execution strategy
      */
     public String getExecutionStrategy() {
         return executionStrategy;
     }
 
     /**
      * @param executionStrategy the new execution strategy
      */
     public void setExecutionStrategy(String executionStrategy) {
         this.executionStrategy = executionStrategy;
     }
 
     /**
      * @return the mojo configuration
      */
     public PlexusConfiguration getMojoConfiguration() {
         if (mojoConfiguration == null) {
             mojoConfiguration = new XmlPlexusConfiguration("configuration");
         }
         return mojoConfiguration;
     }
 
     /**
      * @param mojoConfiguration a new mojo configuration
      */
     public void setMojoConfiguration(PlexusConfiguration mojoConfiguration) {
         this.mojoConfiguration = mojoConfiguration;
     }
 
     /** {@inheritDoc} */
     public String getRole() {
         return Mojo.ROLE;
     }
 
     /** {@inheritDoc} */
     public String getRoleHint() {
         return getId();
     }
 
     /**
      * @return the id of the mojo, based on the goal name
      */
     public String getId() {
         return getPluginDescriptor().getId() + ":" + getGoal();
     }
 
     /**
      * @return the full goal name
      * @see PluginDescriptor#getGoalPrefix()
      * @see #getGoal()
      */
     public String getFullGoalName() {
         return getPluginDescriptor().getGoalPrefix() + ":" + getGoal();
     }
 
     /** {@inheritDoc} */
     public String getComponentType() {
         return MAVEN_PLUGIN;
     }
 
     /**
      * @return the plugin descriptor
      */
     public PluginDescriptor getPluginDescriptor() {
         return pluginDescriptor;
     }
 
     /**
      * @param pluginDescriptor the new plugin descriptor
      */
     public void setPluginDescriptor(PluginDescriptor pluginDescriptor) {
         this.pluginDescriptor = pluginDescriptor;
     }
 
     /**
      * @return <code>true</code> if the Mojo is inherited, <code>false</code> otherwise.
      */
     public boolean isInheritedByDefault() {
         return inheritedByDefault;
     }
 
     /**
      * @param inheritedByDefault <code>true</code> if the Mojo is inherited, <code>false</code> otherwise.
      */
     public void setInheritedByDefault(boolean inheritedByDefault) {
         this.inheritedByDefault = inheritedByDefault;
     }
 
     /** {@inheritDoc} */
     public boolean equals(Object object) {
         if (this == object) {
             return true;
         }
 
         if (object instanceof MojoDescriptor) {
             MojoDescriptor other = (MojoDescriptor) object;
 
             if (!compareObjects(getPluginDescriptor(), other.getPluginDescriptor())) {
                 return false;
             }
 
             return compareObjects(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 the invocation lifecycle of the Mojo
      */
     public String getExecuteLifecycle() {
         return executeLifecycle;
     }
 
     /**
      * @param executeLifecycle the new invocation lifecycle of the Mojo
      */
     public void setExecuteLifecycle(String executeLifecycle) {
         this.executeLifecycle = executeLifecycle;
     }
 
     /**
      * @param aggregator <code>true</code> if the Mojo uses the Maven project and its child modules,
      * <code>false</code> otherwise.
      */
     public void setAggregator(boolean aggregator) {
         this.aggregator = aggregator;
     }
 
     /**
      * @return <code>true</code> if the Mojo uses the Maven project and its child modules,
      * <code>false</code> otherwise.
      */
     public boolean isAggregator() {
         return aggregator;
     }
 
     /**
      * @return <code>true</code> if the Mojo cannot be invoked directly, <code>false</code> otherwise.
      */
     public boolean isDirectInvocationOnly() {
         return directInvocationOnly;
     }
 
     /**
      * @param directInvocationOnly <code>true</code> if the Mojo cannot be invoked directly,
      * <code>false</code> otherwise.
      */
     public void setDirectInvocationOnly(boolean directInvocationOnly) {
         this.directInvocationOnly = directInvocationOnly;
     }
 
     /**
      * @return <code>true</code> if the Mojo needs reports to run, <code>false</code> otherwise.
      */
     public boolean isRequiresReports() {
         return requiresReports;
     }
 
     /**
      * @param requiresReports <code>true</code> if the Mojo needs reports to run, <code>false</code> otherwise.
      */
     public void setRequiresReports(boolean requiresReports) {
         this.requiresReports = requiresReports;
     }
 
     /**
      * @param executeGoal the new invocation goal of the Mojo
      */
     public void setExecuteGoal(String executeGoal) {
         this.executeGoal = executeGoal;
     }
 
     /**
      * @return the invocation goal of the Mojo
      */
     public String getExecuteGoal() {
         return executeGoal;
     }
 
     /**
      * @return True if the <code>Mojo</code> is thread-safe and can be run safely in parallel
      * @since 3.0-beta-2
      */
     public boolean isThreadSafe() {
         return threadSafe;
     }
 
     /**
      * @param threadSafe indicates that the mojo is thread-safe and can be run safely in parallel
      * @since 3.0-beta-2
      */
     public void setThreadSafe(boolean threadSafe) {
         this.threadSafe = threadSafe;
     }
 
     /**
      * @return {@code true} if this mojo forks either a goal or the lifecycle, {@code false} otherwise.
      */
     public boolean isForking() {
         return (getExecuteGoal() != null && getExecuteGoal().length() > 0)
                 || (getExecutePhase() != null && getExecutePhase().length() > 0);
     }
 
     /**
      * Creates a shallow copy of this mojo descriptor.
      */
     @Override
     public MojoDescriptor clone() {
         try {
             return (MojoDescriptor) super.clone();
         } catch (CloneNotSupportedException e) {
             throw new UnsupportedOperationException(e);
         }
     }
 }