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/*
 * Copyright 2015 JAXIO http://www.jaxio.com
 *
 * 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.jaxio.celerio.model.support;

import com.jaxio.celerio.model.Attribute;
import com.jaxio.celerio.model.Entity;
import com.jaxio.celerio.model.Relation;
import com.jaxio.celerio.model.Unique;
import com.jaxio.celerio.util.support.ListGetter;

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

import static com.google.common.collect.Lists.newArrayList;
import static java.util.Collections.emptyList;

public class EntityListGetters {

    public static ListGetter LOCALIZABLE_TO_DISPLAY_STRING_ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            List result = newArrayList();
            for (Attribute a : o.printerAttributes()) {
                if (a.isLocalizable()) {
                    result.add(a);
                }
            }
            return result;
        }
    };

    public static ListGetter PRINTER_ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            return o.printerAttributes();
        }
    };

    public static ListGetter STRING_PRINTER_ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            return o.stringPrinterAttributes();
        }
    };

    public static ListGetter INDEXED_PRINTER_ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            return o.indexedPrinterAttributes();
        }
    };

    public static ListGetter ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            return o.getCurrentAttributes();
        }
    };

    public static ListGetter PK_ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            return o.getPrimaryKey().getAttributes();
        }
    };

    public static ListGetter CPK_ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            if (o.hasCompositePk()) {
                return o.getPrimaryKey().getAttributes();
            } else {
                return emptyList();
            }
        }
    };

    public static ListGetter ATTRIBUTES_AND_PK_ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            List result = newArrayList();
            result.addAll(o.getCurrentAttributes());
            if (!o.isRoot()) {
                result.addAll(o.getRoot().getPrimaryKey().getAttributes());
            }
            return result;
        }
    };

    public static ListGetter HIERARCHY_ATTRIBUTES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            return newArrayList(o.getParent());
        }
    };

    public static ListGetter RELATED_ENTITIES = new ListGetter() {
        @Override
        public List getList(Entity entity) {
            ArrayList ret = newArrayList(entity);
            for (Relation relation : entity.getRelations().getList()) {
                ret.add(relation.getToEntity());
            }
            return ret;
        }
    };

    public static ListGetter RELATIONS = new ListGetter() {
        @Override
        public List getList(Entity o) {
            return o.getCurrentRelations();
        }
    };

    public static ListGetter UNIQUES = new ListGetter() {
        @Override
        public List getList(Entity o) {
            return o.getCurrentUniques();
        }
    };

    public static ListGetter SEARCH_RESULTS = new ListGetter() {
        @Override
        public List getList(Entity entity) {
            ArrayList ret = newArrayList();
            ret.addAll(entity.getSearchResultAttributesManual().getList());
            if (ret.size() == 0) {
                int left = 6;
                for (Attribute attr : entity.getSearchResultAttributesConvention().getList()) {
                    if (left > 0) {
                        left--;
                        ret.add(attr);
                    }
                }
            }
            return ret;
        }
    };
}