ClassModel.java

/*                        __    __  __  __    __  ___
 *                       \  \  /  /    \  \  /  /  __/
 *                        \  \/  /  /\  \  \/  /  /
 *                         \____/__/  \__\____/__/.ɪᴏ
 * ᶜᵒᵖʸʳᶦᵍʰᵗ ᵇʸ ᵛᵃᵛʳ ⁻ ˡᶦᶜᵉⁿˢᵉᵈ ᵘⁿᵈᵉʳ ᵗʰᵉ ᵃᵖᵃᶜʰᵉ ˡᶦᶜᵉⁿˢᵉ ᵛᵉʳˢᶦᵒⁿ ᵗʷᵒ ᵈᵒᵗ ᶻᵉʳᵒ
 */
package io.vavr.match.model;

import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.util.Elements;
import java.util.List;

import static java.util.stream.Collectors.toList;

/**
 * Representation of a class.
 *
 * @author Daniel Dietrich
 */
public class ClassModel {

    private final Elements elementUtils;
    private final DeclaredType declaredType;

    public static ClassModel of(Elements elementUtils, TypeElement typeElement) {
        return new ClassModel(elementUtils, (DeclaredType) typeElement.asType());
    }

    public ClassModel(Elements elementUtils, DeclaredType declaredType) {
        this.elementUtils = elementUtils;
        this.declaredType = declaredType;
    }

    public TypeElement typeElement() {
        return (TypeElement) declaredType.asElement();
    }

    // returns the simple name for top level class and the combined class name for inner classes
    public String getClassName() {
        final String fqn = getFullQualifiedName();
        return hasDefaultPackage() ? fqn : fqn.substring(getPackageName().length() + 1);
    }

    public String getFullQualifiedName() {
        return typeElement().getQualifiedName().toString();
    }

    public List<MethodModel> getMethods() {
        return typeElement().getEnclosedElements().stream()
                .filter(element -> {
                    final String name = element.getSimpleName().toString();
                    return element instanceof ExecutableElement && !name.isEmpty() && !"<init>".equals(name) && !"<clinit>".equals(name);
                })
                .map(element -> new MethodModel(elementUtils, (ExecutableElement) element))
                .collect(toList());
    }

    public String getPackageName() {
        return elementUtils.getPackageOf(typeElement()).getQualifiedName().toString();
    }

    public List<TypeParameterModel> getTypeParameters() {
        return declaredType.getTypeArguments().stream()
                .map(typeMirror -> new TypeParameterModel(elementUtils, typeMirror))
                .collect(toList());
    }

    public boolean hasDefaultPackage() {
        return elementUtils.getPackageOf(typeElement()).isUnnamed();
    }

    @Override
    public boolean equals(Object o) {
        return (o == this) || (o instanceof ClassModel && toString().equals(o.toString()));
    }

    @Override
    public int hashCode() {
        return toString().hashCode();
    }

    @Override
    public String toString() {
        return declaredType.toString();
    }
}