anjiaqi1234567 | 7cc5e71 | 2016-10-18 16:07:06 +0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | 23c7e32 | 2017-08-03 18:48:27 -0700 | [diff] [blame^] | 2 | * Copyright 2016-present Open Networking Foundation |
anjiaqi1234567 | 7cc5e71 | 2016-10-18 16:07:06 +0800 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.nemo.model.common; |
| 17 | |
| 18 | import java.beans.ConstructorProperties; |
| 19 | import java.io.Serializable; |
| 20 | import java.util.Objects; |
| 21 | import java.util.regex.Pattern; |
| 22 | |
| 23 | import static com.google.common.base.Preconditions.checkArgument; |
| 24 | import static com.google.common.base.Preconditions.checkNotNull; |
| 25 | |
| 26 | /** |
| 27 | * A generic string name type. Names must start with a letter. |
| 28 | */ |
| 29 | public class Name implements Serializable { |
| 30 | private static final long serialVersionUID = -1664832583906649664L; |
| 31 | |
| 32 | // package-private for unit test access |
| 33 | static final int MIN_LENGTH = 1; |
| 34 | static final int MAX_LENGTH = 256; |
| 35 | |
| 36 | static final String E_NULL_VALUE = "Supplied value may not be null"; |
| 37 | static final String E_BAD_FORMAT = |
| 38 | "Supplied value \"%s\" does not match required pattern \"%s\""; |
| 39 | static String E_BAD_LENGTH = "Invalid length: %d, expected: [[" + |
| 40 | MIN_LENGTH + "‥" + MAX_LENGTH + "]]."; |
| 41 | |
| 42 | static final String NAME_PATTERN = "^[a-zA-Z]([a-zA-Z0-9\\-_.])*$"; |
| 43 | |
| 44 | private static final Pattern RE_NAME = Pattern.compile(NAME_PATTERN); |
| 45 | |
| 46 | private final String value; |
| 47 | |
| 48 | /** |
| 49 | * Creates a new instance from a given name. |
| 50 | * |
| 51 | * @param value name |
| 52 | */ |
| 53 | @ConstructorProperties("value") |
| 54 | public Name(String value) { |
| 55 | checkNotNull(value, E_NULL_VALUE); |
| 56 | checkValueLength(value); |
| 57 | checkArgument(RE_NAME.matcher(value).matches(), |
| 58 | E_BAD_FORMAT, value, NAME_PATTERN); |
| 59 | this.value = value; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * Creates a copy from the given name object. |
| 64 | * |
| 65 | * @param source name object |
| 66 | */ |
| 67 | public Name(Name source) { |
| 68 | this.value = source.value; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Returns the value of this instance. |
| 73 | * |
| 74 | * @return the value |
| 75 | */ |
| 76 | public String getValue() { |
| 77 | return value; |
| 78 | } |
| 79 | |
| 80 | @Override |
| 81 | public int hashCode() { |
| 82 | return value.hashCode(); |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public boolean equals(Object obj) { |
| 87 | if (this == obj) { |
| 88 | return true; |
| 89 | } |
| 90 | if (obj == null) { |
| 91 | return false; |
| 92 | } |
| 93 | if (getClass() != obj.getClass()) { |
| 94 | return false; |
| 95 | } |
| 96 | Name other = (Name) obj; |
| 97 | return Objects.equals(value, other.value); |
| 98 | } |
| 99 | |
| 100 | private static void checkValueLength(String value) { |
| 101 | int length = value.length(); |
| 102 | if (length < MIN_LENGTH || length > MAX_LENGTH) { |
| 103 | throw new IllegalArgumentException(String.format(E_BAD_LENGTH, length)); |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | |