/* * This file is part of CraftoDB, licensed under the MIT License (MIT). * * Copyright (c) 2017 CraftolutionDE <https://craftolution.de> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Website: https://craftolution.de/ * Contact: [email protected] */ package de.craftolution.craftodb.table; import de.craftolution.craftodb.column.Column; import de.craftolution.craftodb.query.Query; import de.craftolution.craftodb.utils.DBUtil; import java.util.Arrays; /** * Represents an index */ public class Index { private final String name; private final IndexType type; private final String[] columns; /** TODO: Documentation */ public Index(final String name, final IndexType type, final Column... columns) throws IllegalArgumentException { DBUtil.notNullNotEmpty(name, "The name must neither be null nor empty!"); DBUtil.notNull(type, "The type must not be null!"); DBUtil.notNullNotEmpty(columns, "The columns array must neither be null nor empty!"); this.name = name; this.type = type; this.columns = new String[columns.length]; // Convert Column to String & check for null for (int i = 0; i < columns.length; i++) { if (columns[i] == null) { throw new IllegalArgumentException("The column at index " + i + " is null!"); } this.columns[i] = columns[i].getName(); } } /** TODO: Documentation */ public Index(final String name, final IndexType type, final String... columns) throws IllegalArgumentException { DBUtil.notNull(name, "The name must not be null!"); DBUtil.notNull(type, "The type must not be null!"); DBUtil.notNullNotEmpty(columns, "The columns array must neither be null nor empty!"); this.name = name; this.type = type; this.columns = columns; // Check for null for (int i = 0; i < columns.length; i++) { if (columns[i] == null) { throw new IllegalArgumentException("The column at index " + i + " is null!"); } } } /** TODO: Documentation */ public String getName() { return this.name; } /** TODO: Documentation */ public IndexType getType() { return this.type; } /** TODO: Documentation */ public String[] getColumns() { return this.columns; } /** TODO: Documentation */ public Query toQuery() { final StringBuilder b = new StringBuilder(); switch (this.type) { case FULLTEXT: b.append("FULLTEXT KEY `").append(this.name).append("` (").append(DBUtil.join(c -> "`" + c + "`", ", ", this.columns)).append(")"); break; case INDEX: b.append("KEY `").append(this.name).append("` (").append(DBUtil.join(c -> "`" + c + "`", ", ", this.columns)).append(")"); break; case PRIMARY: b.append("PRIMARY KEY `").append(this.name).append("` (").append(DBUtil.join(c -> "`" + c + "`", ", ", this.columns)).append(")"); break; case UNIQUE: b.append("UNIQUE KEY `").append(this.name).append("` (").append(DBUtil.join(c -> "`" + c + "`", ", ", this.columns)).append(")"); break; } return Query.of(b.toString()); } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Index index = (Index) o; if (!getName().equals(index.getName())) return false; if (getType() != index.getType()) return false; // Probably incorrect - comparing Object[] arrays with Arrays.equals return Arrays.equals(getColumns(), index.getColumns()); } @Override public int hashCode() { int result = getName().hashCode(); result = 31 * result + getType().hashCode(); result = 31 * result + Arrays.hashCode(getColumns()); return result; } @Override public String toString() { return "Index{" + "name='" + name + '\'' + ", type=" + type + ", columns=" + Arrays.toString(columns) + '}'; } }