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An annotation processor for generating type-safe bean mappers
There is a newer version: 1.6.3
/*
 * Copyright MapStruct Authors.
 *
 * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
 */
package org.mapstruct.ap.internal.model;

import java.util.List;
import java.util.Set;
import java.util.SortedSet;

import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.TypeElement;

import org.mapstruct.ap.internal.model.common.Accessibility;
import org.mapstruct.ap.internal.model.common.Type;
import org.mapstruct.ap.internal.model.common.TypeFactory;
import org.mapstruct.ap.internal.option.Options;
import org.mapstruct.ap.internal.version.VersionInformation;

/**
 * Represents a type implementing a mapper interface (annotated with {@code @Mapper}). This is the root object of the
 * mapper model.
 *
 * @author Gunnar Morling
 */
public class Mapper extends GeneratedType {

    static final String CLASS_NAME_PLACEHOLDER = "";
    static final String PACKAGE_NAME_PLACEHOLDER = "";
    static final String DEFAULT_IMPLEMENTATION_CLASS = CLASS_NAME_PLACEHOLDER + "Impl";
    static final String DEFAULT_IMPLEMENTATION_PACKAGE = PACKAGE_NAME_PLACEHOLDER;

    public static class Builder extends GeneratedTypeBuilder {

        private TypeElement element;
        private List fields;
        private Set fragments;

        private Decorator decorator;
        private String implName;
        private boolean customName;
        private String implPackage;
        private boolean customPackage;

        public Builder() {
            super( Builder.class );
        }

        public Builder element(TypeElement element) {
            this.element = element;
            return this;
        }

        public Builder fields(List fields) {
            this.fields = fields;
            return this;
        }

        public Builder constructorFragments(Set  fragments) {
            this.fragments = fragments;
            return this;
        }

        public Builder decorator(Decorator decorator) {
            this.decorator = decorator;
            return this;
        }

        public Builder implName(String implName) {
            this.implName = implName;
            this.customName = !DEFAULT_IMPLEMENTATION_CLASS.equals( this.implName );
            return this;
        }

        public Builder implPackage(String implPackage) {
            this.implPackage = implPackage;
            this.customPackage = !DEFAULT_IMPLEMENTATION_PACKAGE.equals( this.implPackage );
            return this;
        }

        public Mapper build() {
            String implementationName = implName.replace( CLASS_NAME_PLACEHOLDER, getFlatName( element ) ) +
                ( decorator == null ? "" : "_" );

            String elementPackage = elementUtils.getPackageOf( element ).getQualifiedName().toString();
            String packageName = implPackage.replace( PACKAGE_NAME_PLACEHOLDER, elementPackage );
            Constructor constructor = null;
            if ( !fragments.isEmpty() ) {
                constructor = new NoArgumentConstructor( implementationName, fragments );
            }
            return new Mapper(
                typeFactory,
                packageName,
                implementationName,
                element.getKind() != ElementKind.INTERFACE ? element.getSimpleName().toString() : null,
                elementPackage,
                element.getKind() == ElementKind.INTERFACE ? element.getSimpleName().toString() : null,
                customPackage,
                customName,
                methods,
                options,
                versionInformation,
                Accessibility.fromModifiers( element.getModifiers() ),
                fields,
                constructor,
                decorator,
                extraImportedTypes
            );
        }

    }

    private final boolean customPackage;
    private final boolean customImplName;
    private Decorator decorator;

    @SuppressWarnings( "checkstyle:parameternumber" )
    private Mapper(TypeFactory typeFactory, String packageName, String name, String superClassName,
                   String interfacePackage, String interfaceName, boolean customPackage, boolean customImplName,
                   List methods, Options options, VersionInformation versionInformation,
                   Accessibility accessibility, List fields, Constructor constructor,
                   Decorator decorator, SortedSet extraImportedTypes ) {

        super(
            typeFactory,
            packageName,
            name,
            superClassName,
            interfacePackage,
            interfaceName,
            methods,
            fields,
            options,
            versionInformation,
            accessibility,
            extraImportedTypes,
            constructor
        );
        this.customPackage = customPackage;
        this.customImplName = customImplName;

        this.decorator = decorator;
    }

    public Decorator getDecorator() {
        return decorator;
    }

    public void removeDecorator() {
        this.decorator = null;
    }

    public boolean hasCustomImplementation() {
        return customImplName || customPackage;
    }

    @Override
    protected String getTemplateName() {
        return getTemplateNameForClass( GeneratedType.class );
    }

    /**
     * Returns the same as {@link Class#getName()} but without the package declaration.
     */
    public static String getFlatName(TypeElement element) {
        if (!(element.getEnclosingElement() instanceof TypeElement)) {
            return element.getSimpleName().toString();
        }
        StringBuilder nameBuilder = new StringBuilder( element.getSimpleName().toString() );
        for (Element enclosing = element.getEnclosingElement(); enclosing instanceof TypeElement; enclosing =
                enclosing.getEnclosingElement()) {
            nameBuilder.insert( 0, '$' );
            nameBuilder.insert( 0, enclosing.getSimpleName().toString() );
        }
        return nameBuilder.toString();
    }
}