| /* |
| * 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 org.apache.ignite.binary; |
| |
| import org.apache.ignite.internal.util.typedef.internal.A; |
| |
| /** |
| * Base binary ID mapper implementation. |
| */ |
| public class BinaryBasicIdMapper implements BinaryIdMapper { |
| /** Default lower case flag setting. */ |
| public static final boolean DFLT_LOWER_CASE = true; |
| |
| /** Maximum lower-case character. */ |
| private static final char MAX_LOWER_CASE_CHAR = 0x7e; |
| |
| /** Cached lower-case characters. */ |
| private static final char[] LOWER_CASE_CHARS; |
| |
| /** */ |
| private boolean isLowerCase = DFLT_LOWER_CASE; |
| |
| /** |
| * Static initializer. |
| */ |
| static { |
| LOWER_CASE_CHARS = new char[MAX_LOWER_CASE_CHAR + 1]; |
| |
| for (char c = 0; c <= MAX_LOWER_CASE_CHAR; c++) |
| LOWER_CASE_CHARS[c] = Character.toLowerCase(c); |
| } |
| |
| /** |
| * Default constructor. |
| */ |
| public BinaryBasicIdMapper() { |
| } |
| |
| /** |
| * @param isLowerCase Whether to use strings in lower case or not. |
| * <p> |
| * Defaults to {@link #DFLT_LOWER_CASE}. |
| */ |
| public BinaryBasicIdMapper(boolean isLowerCase) { |
| this.isLowerCase = isLowerCase; |
| } |
| |
| /** |
| * Get type ID. |
| * |
| * @param typeName Type name. |
| * @return Type ID. |
| */ |
| @Override public int typeId(String typeName) { |
| A.notNull(typeName, "typeName"); |
| |
| int id = isLowerCase ? lowerCaseHashCode(typeName) : typeName.hashCode(); |
| |
| if (id != 0) |
| return id; |
| else { |
| throw new BinaryObjectException("Binary ID mapper resolved type ID to zero " + |
| "(either change type's name or use custom ID mapper) " + |
| "[name=" + typeName + ", isLowerCase=" + isLowerCase + "]"); |
| } |
| } |
| |
| /** |
| * Get field ID. |
| * |
| * @param typeId Type ID. |
| * @param fieldName Field name. |
| * @return Field ID. |
| */ |
| @Override public int fieldId(int typeId, String fieldName) { |
| A.notNull(fieldName, "fieldName"); |
| |
| int id = isLowerCase ? lowerCaseHashCode(fieldName) : fieldName.hashCode(); |
| |
| if (id != 0) |
| return id; |
| else { |
| throw new BinaryObjectException("Binary ID mapper resolved field ID to zero " + |
| "(either change filed's name or use custom ID mapper) " + |
| "[name=" + fieldName + ", isLowerCase=" + isLowerCase + "]"); |
| } |
| } |
| |
| /** |
| * Gets whether to use strings in lower case or not. |
| * |
| * @return Whether to use strings in lower case or not. |
| */ |
| public boolean isLowerCase() { |
| return isLowerCase; |
| } |
| |
| /** |
| * Sets whether to use strings in lower case or not. |
| * |
| * @param isLowerCase Whether to use strings in lower case or not. |
| * @return {@code this} for chaining. |
| */ |
| public BinaryBasicIdMapper setLowerCase(boolean isLowerCase) { |
| this.isLowerCase = isLowerCase; |
| |
| return this; |
| } |
| |
| /** |
| * Routine to calculate string hash code an |
| * |
| * @param str String. |
| * @return Hash code for given string converted to lower case. |
| */ |
| private static int lowerCaseHashCode(String str) { |
| int len = str.length(); |
| |
| int h = 0; |
| |
| for (int i = 0; i < len; i++) { |
| int c = str.charAt(i); |
| |
| c = c <= MAX_LOWER_CASE_CHAR ? LOWER_CASE_CHARS[c] : Character.toLowerCase(c); |
| |
| h = 31 * h + c; |
| } |
| |
| return h; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean equals(Object o) { |
| if (this == o) |
| return true; |
| |
| if (!(o instanceof BinaryBasicIdMapper)) |
| return false; |
| |
| BinaryBasicIdMapper mapper = (BinaryBasicIdMapper)o; |
| |
| return isLowerCase == mapper.isLowerCase; |
| |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int hashCode() { |
| return (isLowerCase ? 1 : 0); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return "BinaryBaseIdMapper [isLowerCase=" + isLowerCase + ']'; |
| } |
| } |