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/*
 * Copyright (C) 2013 The Guava Authors
 *
 * 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.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import java.util.AbstractCollection;
import java.util.AbstractSet;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.annotation.Nullable;

/**
 *  Skeletal, implementation-agnostic implementation of the {@link Table} interface.
 *
 *  @author Louis Wasserman
 *
 * @deprecated The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023
 */
@GwtCompatible
@Deprecated(since = "2022-12-01")
abstract class AbstractTable implements Table {

    @Override
    public boolean containsRow(@Nullable Object rowKey) {
        return Maps.safeContainsKey(rowMap(), rowKey);
    }

    @Override
    public boolean containsColumn(@Nullable Object columnKey) {
        return Maps.safeContainsKey(columnMap(), columnKey);
    }

    @Override
    public Set rowKeySet() {
        return rowMap().keySet();
    }

    @Override
    public Set columnKeySet() {
        return columnMap().keySet();
    }

    @Override
    public boolean containsValue(@Nullable Object value) {
        for (Map row : rowMap().values()) {
            if (row.containsValue(value)) {
                return true;
            }
        }
        return false;
    }

    @Override
    public boolean contains(@Nullable Object rowKey, @Nullable Object columnKey) {
        Map row = Maps.safeGet(rowMap(), rowKey);
        return row != null && Maps.safeContainsKey(row, columnKey);
    }

    @Override
    public V get(@Nullable Object rowKey, @Nullable Object columnKey) {
        Map row = Maps.safeGet(rowMap(), rowKey);
        return (row == null) ? null : Maps.safeGet(row, columnKey);
    }

    @Override
    public boolean isEmpty() {
        return size() == 0;
    }

    @Override
    public void clear() {
        Iterators.clear(cellSet().iterator());
    }

    @Override
    public V remove(@Nullable Object rowKey, @Nullable Object columnKey) {
        Map row = Maps.safeGet(rowMap(), rowKey);
        return (row == null) ? null : Maps.safeRemove(row, columnKey);
    }

    @Override
    public V put(R rowKey, C columnKey, V value) {
        return row(rowKey).put(columnKey, value);
    }

    @Override
    public void putAll(Table table) {
        for (Table.Cell cell : table.cellSet()) {
            put(cell.getRowKey(), cell.getColumnKey(), cell.getValue());
        }
    }

    private transient Set> cellSet;

    @Override
    public Set> cellSet() {
        Set> result = cellSet;
        return (result == null) ? cellSet = createCellSet() : result;
    }

    Set> createCellSet() {
        return new CellSet();
    }

    abstract Iterator> cellIterator();

    // @deprecated The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023
    @Deprecated(since = "2022-12-01")
    class CellSet extends AbstractSet> {

        @Override
        public boolean contains(Object o) {
            if (o instanceof Cell) {
                Cell cell = (Cell) o;
                Map row = Maps.safeGet(rowMap(), cell.getRowKey());
                return row != null && Collections2.safeContains(row.entrySet(), Maps.immutableEntry(cell.getColumnKey(), cell.getValue()));
            }
            return false;
        }

        @Override
        public boolean remove(@Nullable Object o) {
            if (o instanceof Cell) {
                Cell cell = (Cell) o;
                Map row = Maps.safeGet(rowMap(), cell.getRowKey());
                return row != null && Collections2.safeRemove(row.entrySet(), Maps.immutableEntry(cell.getColumnKey(), cell.getValue()));
            }
            return false;
        }

        @Override
        public void clear() {
            AbstractTable.this.clear();
        }

        @Override
        public Iterator> iterator() {
            return cellIterator();
        }

        @Override
        public int size() {
            return AbstractTable.this.size();
        }
    }

    private transient Collection values;

    @Override
    public Collection values() {
        Collection result = values;
        return (result == null) ? values = createValues() : result;
    }

    Collection createValues() {
        return new Values();
    }

    Iterator valuesIterator() {
        return new TransformedIterator, V>(cellSet().iterator()) {

            @Override
            V transform(Cell cell) {
                return cell.getValue();
            }
        };
    }

    // @deprecated The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023
    @Deprecated(since = "2022-12-01")
    class Values extends AbstractCollection {

        @Override
        public Iterator iterator() {
            return valuesIterator();
        }

        @Override
        public boolean contains(Object o) {
            return containsValue(o);
        }

        @Override
        public void clear() {
            AbstractTable.this.clear();
        }

        @Override
        public int size() {
            return AbstractTable.this.size();
        }
    }

    @Override
    public boolean equals(@Nullable Object obj) {
        return Tables.equalsImpl(this, obj);
    }

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

    /**
     * Returns the string representation {@code rowMap().toString()}.
     */
    @Override
    public String toString() {
        return rowMap().toString();
    }
}