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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you 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.hazelcast.org.apache.calcite.avatica.util;

import com.hazelcast.org.apache.calcite.avatica.AvaticaUtils;
import com.hazelcast.org.apache.calcite.avatica.ColumnMetaData;

import java.sql.Array;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Objects;

/** Implementation of JDBC {@link Array}. */
public class ArrayImpl implements Array {
  private final List list;
  private final AbstractCursor.ArrayAccessor accessor;

  public ArrayImpl(List list, AbstractCursor.ArrayAccessor accessor) {
    this.list = list;
    this.accessor = accessor;
  }

  public String getBaseTypeName() throws SQLException {
    return accessor.componentType.getName();
  }

  public int getBaseType() throws SQLException {
    return accessor.componentType.id;
  }

  public Object getArray() throws SQLException {
    return getArray(list, accessor);
  }

  @Override public String toString() {
    final Iterator iterator = list.iterator();
    if (!iterator.hasNext()) {
      return "[]";
    }
    final StringBuilder buf = new StringBuilder("[");
    for (;;) {
      accessor.componentSlotGetter.slot = iterator.next();
      try {
        append(buf, accessor.componentAccessor.getString());
      } catch (SQLException e) {
        throw new RuntimeException(e);
      }
      accessor.componentSlotGetter.slot = null;
      if (!iterator.hasNext()) {
        return buf.append("]").toString();
      }
      buf.append(", ");
    }
  }

  private void append(StringBuilder buf, Object o) {
    if (o == null) {
      buf.append("null");
    } else if (o.getClass().isArray()) {
      append(buf, AvaticaUtils.primitiveList(o));
    } else {
      buf.append(o);
    }
  }

  /**
   * Converts a list into an array.
   *
   * 

If the elements of the list are primitives, converts to an array of * primitives (e.g. {@code boolean[]}.

* * @param list List of objects * * @return array * @throws ClassCastException if any element is not of the box type * @throws NullPointerException if any element is null */ @SuppressWarnings("unchecked") protected Object getArray(List list, AbstractCursor.ArrayAccessor arrayAccessor) throws SQLException { int i = 0; switch (arrayAccessor.componentType.rep) { case PRIMITIVE_DOUBLE: final double[] doubles = new double[list.size()]; for (double v : (List) list) { doubles[i++] = v; } return doubles; case PRIMITIVE_FLOAT: final float[] floats = new float[list.size()]; for (float v : (List) list) { floats[i++] = v; } return floats; case PRIMITIVE_INT: final int[] ints = new int[list.size()]; for (int v : (List) list) { ints[i++] = v; } return ints; case PRIMITIVE_LONG: final long[] longs = new long[list.size()]; for (long v : (List) list) { longs[i++] = v; } return longs; case PRIMITIVE_SHORT: final short[] shorts = new short[list.size()]; for (short v : (List) list) { shorts[i++] = v; } return shorts; case PRIMITIVE_BOOLEAN: final boolean[] booleans = new boolean[list.size()]; for (boolean v : (List) list) { booleans[i++] = v; } return booleans; case PRIMITIVE_BYTE: final byte[] bytes = new byte[list.size()]; for (byte v : (List) list) { bytes[i++] = v; } return bytes; case PRIMITIVE_CHAR: final char[] chars = new char[list.size()]; for (char v : (List) list) { chars[i++] = v; } return chars; default: // fall through } final Object[] objects = list.toArray(); switch (arrayAccessor.componentType.id) { case Types.ARRAY: final AbstractCursor.ArrayAccessor componentAccessor = (AbstractCursor.ArrayAccessor) arrayAccessor.componentAccessor; for (i = 0; i < objects.length; i++) { // Convert the element into a Object[] or primitive array, recurse! objects[i] = getArrayData(objects[i], componentAccessor); } } return objects; } Object getArrayData(Object o, AbstractCursor.ArrayAccessor componentAccessor) throws SQLException { if (o instanceof List) { return getArray((List) o, componentAccessor); } else if (o instanceof ArrayImpl) { return (ArrayImpl) o; } throw new RuntimeException("Unhandled"); } @Override public Object getArray(Map> map) throws SQLException { throw new UnsupportedOperationException(); // TODO } @Override public Object getArray(long index, int count) throws SQLException { if (index > Integer.MAX_VALUE) { throw new IllegalArgumentException("Arrays cannot be longer than " + Integer.MAX_VALUE); } // Convert from one-index to zero-index int startIndex = ((int) index) - 1; if (startIndex < 0 || startIndex > list.size()) { throw new IllegalArgumentException("Invalid index: " + index + ". Size = " + list.size()); } int endIndex = startIndex + count; if (endIndex > list.size()) { throw new IllegalArgumentException("Invalid count provided. Size = " + list.size() + ", count = " + count); } // End index is non-inclusive return getArray(list.subList(startIndex, endIndex), accessor); } @Override public Object getArray(long index, int count, Map> map) throws SQLException { throw new UnsupportedOperationException(); // TODO } @Override public ResultSet getResultSet() throws SQLException { return accessor.factory.create(accessor.componentType, list); } @Override public ResultSet getResultSet(Map> map) throws SQLException { throw new UnsupportedOperationException(); // TODO } @Override public ResultSet getResultSet(long index, int count) throws SQLException { throw new UnsupportedOperationException(); // TODO } @Override public ResultSet getResultSet(long index, int count, Map> map) throws SQLException { throw new UnsupportedOperationException(); // TODO } @Override public void free() throws SQLException { // nothing to do } /** Returns whether two arrays have the same contents. * *

Arrays must have the same size, and elements in the same order. * Elements are compared using {@link Object#equals(Object)}, and null * values are equal to each other. */ public static boolean equalContents(Array left, Array right) throws SQLException { if (left.getBaseType() != right.getBaseType()) { return false; } ResultSet leftResultSet = left.getResultSet(); ResultSet rightResultSet = right.getResultSet(); int leftColumnCount = leftResultSet.getMetaData().getColumnCount(); int rightColumnCount = rightResultSet.getMetaData().getColumnCount(); if (leftColumnCount != rightColumnCount) { return false; } while (leftResultSet.next() && rightResultSet.next()) { for (int i = 1; i <= leftColumnCount; i++) { if (!Objects.equals(leftResultSet.getObject(i), rightResultSet.getObject(i))) { return false; } } } return !leftResultSet.next() && !rightResultSet.next(); } /** Factory that can create a ResultSet or Array based on a stream of values. */ public interface Factory { /** * Creates a {@link ResultSet} from the given list of values per {@link Array#getResultSet()}. * * @param elementType The type of the elements * @param iterable The elements * @throws SQLException on error */ ResultSet create(ColumnMetaData.AvaticaType elementType, Iterable iterable) throws SQLException; /** * Creates an {@link Array} from the given list of values, converting any primitive values * into the corresponding objects. * * @param elementType The type of the elements * @param elements The elements */ Array createArray(ColumnMetaData.AvaticaType elementType, Iterable elements); } } // End ArrayImpl.java