Problems with the creation of the file corresponding to the PersistentStateComponent

IntelliJ Platform
1

Hello everyone.

Today, I try to develop a personnal JETBRAINS plugin.

My problem, my code does not create the xml file corresponding to my PersistentStateComponent.

Here’s my code.

File 1 : ColorStateBean.java

package states.beans;

import com.intellij.util.xmlb.annotations.Attribute;
import com.intellij.util.xmlb.annotations.Property;
import com.intellij.util.xmlb.annotations.Tag;
import com.intellij.util.xmlb.annotations.Transient;

@Tag("color")
@Property(surroundWithTag = false, alwaysWrite = true, flat = true, style = Property.Style.ATTRIBUTE)
public class ColorStateBean {
    // Color identifier
    @Attribute("identifier")
    public int _identifier;

    // Hexadecimal color code.
    @Attribute("hexadecimal_color_code")
    public String _hexadecimal_color_code;

    // Corresponding name.
    @Attribute("corresponding_name")
    public String _corresponding_name;

    // Empty constructor for the PersistentStateComponent XML serialisation.
    @SuppressWarnings({"UnusedDeclaration"})
    public ColorStateBean() {}

    public ColorStateBean(
        ColorStateBean color
    ) {
        System.out.println("ColorStateBean Constructor");
        setId(color.getId());
        setColor(color.getColor());
        setName(color.getName());
    }

    public ColorStateBean(
        int identifier,
        String hexadecimal_color_code,
        String corresponding_name
    ) {
        System.out.println("ColorStateBean Constructor");
        setId(identifier);
        setColor(hexadecimal_color_code);
        setName(corresponding_name);
    }

    @Transient
    public int getId() {
        return _identifier;
    }

    public void setId(int identifier) {
        this._identifier = identifier;
    }

    @Transient
    public String getColor() {
        return _hexadecimal_color_code;
    }

    public void setColor(String hexadecimal_color_code) {
        this._hexadecimal_color_code = hexadecimal_color_code;
    }

    @Transient
    public String getName() {
        return _corresponding_name;
    }

    public void setName(String corresponding_name) {
        this._corresponding_name = corresponding_name;
    }
}

File 2 : ColorsStateBean.java

package states.beans;

import com.intellij.util.xmlb.annotations.Tag;
import com.intellij.util.xmlb.annotations.XCollection;
import states.ColorsDefaultSettings;

import java.util.List;

public class ColorsStateBean {
    @Tag("colors")
    @XCollection()
    public List<ColorStateBean> colorList;

    public ColorsStateBean() {
        System.out.println("ColorsStateBean Constructor");
        colorList = ColorsDefaultSettings.getColorSettingsList();
    }
}

File 3 : ColorsDefaultSettings.java

package states;

import states.beans.ColorStateBean;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class ColorsDefaultSettings {
    public static List<ColorStateBean> getColorSettingsList() {
        return new ArrayList<ColorStateBean>(Arrays.asList(
            new ColorStateBean(1, "#ff0000", "Red"),
            new ColorStateBean(2, "#00ff00", "Green"),
            new ColorStateBean(2, "#0000ff", "Blue")
        ));
    }
}

File 4 : ProjectStateService.java

package services;

import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.components.*;
import com.intellij.openapi.components.State;
import com.intellij.util.xmlb.XmlSerializerUtil;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import states.beans.ColorStateBean;
import states.beans.ColorsStateBean;


@State(name = "CustomProjectTreeView", storages = {@Storage("customProjectTreeView_colors.xml")})
public class ProjectStateService implements PersistentStateComponent<ColorsStateBean> {
    private ColorsStateBean colorsStateBean = new ColorsStateBean();

    public ProjectStateService() {
        System.out.println("ProjectStateService Constructor");
    }

    @Override
    public @Nullable ColorsStateBean getState() {
        System.out.println("getState");
        return this.colorsStateBean;
    }

    @Override
    public void loadState(@NotNull ColorsStateBean colorsStateBean) {
        System.out.println("loadState");
        XmlSerializerUtil.copyBean(colorsStateBean, this.colorsStateBean);
    }
}

File 5 : ProjectStartupActivity.kt

import com.intellij.openapi.project.Project
import com.intellij.openapi.startup.ProjectActivity
import functions.PluginFilesChecker
import services.ProjectStateService


class ProjectStartupActivity : ProjectActivity {
    override suspend fun execute(project: Project) {
        println("The project \"${project.name}\" is loaded.")

        if (PluginFilesChecker.checkColorFileExistence(project)) {
            println("The plugin color file exist.");
        }
        else {
            println("The plugin color file does not exist.")

            val projectStateService = ProjectStateService();

            projectStateService.loadState();
        }
    }
}

File 6 : plugin.xml

<!-- Plugin Configuration File. Read more: https://plugins.jetbrains.com/docs/intellij/plugin-configuration-file.html -->
<idea-plugin>
    <!-- Unique identifier of the plugin. It should be FQN. It cannot be changed between the plugin versions. -->
    <id>com.example.CustomProjectTreeView</id>

    <!-- Public plugin name should be written in Title Case.
         Guidelines: https://plugins.jetbrains.com/docs/marketplace/plugin-overview-page.html#plugin-name -->
    <name>CustomProjectTreeView</name>

    <!-- A displayed Vendor name or Organization ID displayed on the Plugins Page. -->
    <vendor email="TODO" url="TODO">TODO</vendor>

    <!-- Description of the plugin displayed on the Plugin Page and IDE Plugin Manager.
         Simple HTML elements (text formatting, paragraphs, and lists) can be added inside of <![CDATA[ ]]> tag.
         Guidelines: https://plugins.jetbrains.com/docs/marketplace/plugin-overview-page.html#plugin-description -->
    <description>
        <![CDATA[
            Enter short description for your plugin here.<br>
            <em>most HTML tags may be used</em>
        ]]>
    </description>

    <!-- Product and plugin compatibility requirements.
         Read more: https://plugins.jetbrains.com/docs/intellij/plugin-compatibility.html -->
    <depends>com.intellij.modules.platform</depends>

    <!-- Extension points defined by the plugin.
         Read more: https://plugins.jetbrains.com/docs/intellij/plugin-extension-points.html -->
    <extensions defaultExtensionNs="com.intellij">
        <projectService serviceImplementation="services.ProjectStateService"/>
        <postStartupActivity implementation="ProjectStartupActivity"/>
    </extensions>

</idea-plugin>

Hoping for some help.
Let me know if you need any clarification.