TypeCategory.java

/*
 * Copyright 2010, Mysema Ltd
 * 
 * Licensed 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 com.mysema.codegen.model;

import java.util.HashSet;
import java.util.Set;

/**
 * TypeCategory defines the expression type used for a Field
 * 
 * @author tiwe
 * 
 */
public enum TypeCategory {
    /**
     *
     */
    SIMPLE(null),
    /**
     *
     */
    MAP(null),
    /**
     *
     */
    COLLECTION(null),
    /**
     *
     */
    LIST(COLLECTION),
    /**
     *
     */
    SET(COLLECTION),
    /**
     *
     */
    ARRAY(null),
    /**
     *
     */
    COMPARABLE(SIMPLE),
    /**
     *
     */
    BOOLEAN(COMPARABLE, Boolean.class.getName()),
    /**
     *
     */
    DATE(COMPARABLE, java.sql.Date.class.getName(), "org.joda.time.LocalDate",
            "java.time.LocalDate"),
    /**
     *
     */
    DATETIME(COMPARABLE, java.util.Calendar.class.getName(), java.util.Date.class.getName(),
            java.sql.Timestamp.class.getName(), "org.joda.time.LocalDateTime",
            "org.joda.time.Instant", "org.joda.time.DateTime", "org.joda.time.DateMidnight",
            "java.time.Instant", "java.time.LocalDateTime", "java.time.OffsetDateTime", "java.time.ZonedDateTime"),
    /**
     * 
     */
    ENUM(COMPARABLE),
    /**
     * 
     */
    CUSTOM(null),

    /**
     *
     */
    ENTITY(null),

    /**
     *
     */
    NUMERIC(COMPARABLE),
    /**
     *
     */
    STRING(COMPARABLE, String.class.getName()),
    /**
     *
     */
    TIME(COMPARABLE, java.sql.Time.class.getName(), "org.joda.time.LocalTime",
            "java.time.LocalTime", "java.time.OffsetTime");

    private final TypeCategory superType;

    private final Set<String> types;

    TypeCategory(TypeCategory superType, String... types) {
        this.superType = superType;
        this.types = new HashSet<String>(types.length);
        for (String type : types) {
            this.types.add(type);
        }
    }

    public TypeCategory getSuperType() {
        return superType;
    }

    public boolean supports(Class<?> cl) {
        return supports(cl.getName());
    }

    public boolean supports(String className) {
        return types.contains(className);
    }

    /**
     * transitive and reflexive subCategoryOf check
     * 
     * @param ancestor
     * @return
     */
    public boolean isSubCategoryOf(TypeCategory ancestor) {
        if (this == ancestor) {
            return true;
        } else if (superType == null) {
            return false;
        } else {
            return superType == ancestor || superType.isSubCategoryOf(ancestor);
        }
    }

    public static TypeCategory get(String className) {
        for (TypeCategory category : values()) {
            if (category.supports(className)) {
                return category;
            }
        }
        return SIMPLE;
    }

}