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PlantUML is a component that allows to quickly write diagrams from text.
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// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
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 * (C) Copyright 2009-2024, Arnaud Roques
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 * under the terms of the GNU Lesser General Public License as published by
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 * (at your option) any later version.
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 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
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 * along with this library.  If not, see .
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 * messages are usually generated on welcome or error images and never on
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package net.sourceforge.plantuml.classdiagram.command;

import java.util.EnumSet;
import java.util.Set;
import java.util.StringTokenizer;

import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.UmlDiagram;
import net.sourceforge.plantuml.abel.EntityPortion;
import net.sourceforge.plantuml.classdiagram.ClassDiagram;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.regex.IRegex;
import net.sourceforge.plantuml.regex.RegexConcat;
import net.sourceforge.plantuml.regex.RegexLeaf;
import net.sourceforge.plantuml.regex.RegexResult;
import net.sourceforge.plantuml.skin.VisibilityModifier;
import net.sourceforge.plantuml.utils.LineLocation;

public class CommandHideShowByVisibility extends SingleLineCommand2 {

	public static final CommandHideShowByVisibility ME = new CommandHideShowByVisibility();

	private CommandHideShowByVisibility() {
		super(getRegexConcat());
	}

	static IRegex getRegexConcat() {
		return RegexConcat.build(CommandHideShowByVisibility.class.getName(), RegexLeaf.start(), //
				new RegexLeaf("COMMAND", "(hide|show)"), //
				RegexLeaf.spaceOneOrMore(), //
				new RegexLeaf("VISIBILITY",
						"((?:public|private|protected|package)?(?:[,%s]+(?:public|private|protected|package))*)"), //
				RegexLeaf.spaceOneOrMore(), //
				new RegexLeaf("PORTION", "(members?|attributes?|fields?|methods?)"), RegexLeaf.end());
	}

	@Override
	protected CommandExecutionResult executeArg(UmlDiagram classDiagram, LineLocation location, RegexResult arg) {
		if (classDiagram instanceof ClassDiagram) {
			return executeArgClass((ClassDiagram) classDiagram, arg);
		}
		// Just ignored
		return CommandExecutionResult.ok();
	}

	private CommandExecutionResult executeArgClass(ClassDiagram classDiagram, RegexResult arg) {

		final EntityPortion portion = getEntityPortion(arg.get("PORTION", 0));

		final Set visibilities = EnumSet.noneOf(VisibilityModifier.class);
		final StringTokenizer st = new StringTokenizer(StringUtils.goLowerCase(arg.get("VISIBILITY", 0)), " ,");
		while (st.hasMoreTokens()) {
			addVisibilities(st.nextToken(), portion, visibilities);
		}

		classDiagram.hideOrShow(visibilities, arg.get("COMMAND", 0).equalsIgnoreCase("show"));

		return CommandExecutionResult.ok();
	}

	private void addVisibilities(String token, EntityPortion portion, Set result) {
		if (token.equals("public") && (portion == EntityPortion.MEMBER || portion == EntityPortion.FIELD)) {
			result.add(VisibilityModifier.PUBLIC_FIELD);
		}
		if (token.equals("public") && (portion == EntityPortion.MEMBER || portion == EntityPortion.METHOD)) {
			result.add(VisibilityModifier.PUBLIC_METHOD);
		}
		if (token.equals("private") && (portion == EntityPortion.MEMBER || portion == EntityPortion.FIELD)) {
			result.add(VisibilityModifier.PRIVATE_FIELD);
		}
		if (token.equals("private") && (portion == EntityPortion.MEMBER || portion == EntityPortion.METHOD)) {
			result.add(VisibilityModifier.PRIVATE_METHOD);
		}
		if (token.equals("protected") && (portion == EntityPortion.MEMBER || portion == EntityPortion.FIELD)) {
			result.add(VisibilityModifier.PROTECTED_FIELD);
		}
		if (token.equals("protected") && (portion == EntityPortion.MEMBER || portion == EntityPortion.METHOD)) {
			result.add(VisibilityModifier.PROTECTED_METHOD);
		}
		if (token.equals("package") && (portion == EntityPortion.MEMBER || portion == EntityPortion.FIELD)) {
			result.add(VisibilityModifier.PACKAGE_PRIVATE_FIELD);
		}
		if (token.equals("package") && (portion == EntityPortion.MEMBER || portion == EntityPortion.METHOD)) {
			result.add(VisibilityModifier.PACKAGE_PRIVATE_METHOD);
		}
	}

	private EntityPortion getEntityPortion(String s) {
		final String sub = StringUtils.goLowerCase(s.substring(0, 3));
		if (sub.equals("met")) {
			return EntityPortion.METHOD;
		}
		if (sub.equals("mem")) {
			return EntityPortion.MEMBER;
		}
		if (sub.equals("att") || sub.equals("fie")) {
			return EntityPortion.FIELD;
		}
		throw new IllegalArgumentException();
	}

}