| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2009, 2015 Ericsson |
| 3 | * |
| 4 | * All rights reserved. This program and the accompanying materials are made |
| 5 | * available under the terms of the Eclipse Public License v1.0 which |
| 6 | * accompanies this distribution, and is available at |
| 7 | * http://www.eclipse.org/legal/epl-v10.html |
| 8 | * |
| 9 | * Contributors: |
| 10 | * Francois Chouinard - Initial API and implementation |
| 11 | * Francois Chouinard - Updated as per TMF Event Model 1.0 |
| 12 | * Alexandre Montplaisir - Removed Cloneable, made immutable |
| 13 | * Patrick Tasse - Remove getSubField |
| 14 | *******************************************************************************/ |
| 15 | |
| 16 | package org.eclipse.tracecompass.tmf.core.event; |
| 17 | |
| 18 | import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull; |
| 19 | |
| 20 | import java.util.Collection; |
| 21 | import java.util.Map; |
| 22 | |
| 23 | import org.eclipse.jdt.annotation.NonNull; |
| 24 | import org.eclipse.jdt.annotation.Nullable; |
| 25 | import org.eclipse.tracecompass.common.core.NonNullUtils; |
| 26 | import org.eclipse.tracecompass.common.core.ObjectUtils; |
| 27 | |
| 28 | import com.google.common.base.Joiner; |
| 29 | import com.google.common.collect.ImmutableMap; |
| 30 | |
| 31 | /** |
| 32 | * A basic implementation of ITmfEventField. |
| 33 | * <p> |
| 34 | * Non-value fields are structural (i.e. used to represent the event structure |
| 35 | * including optional fields) while the valued fields are actual event fields. |
| 36 | * |
| 37 | * @version 1.0 |
| 38 | * @author Francois Chouinard |
| 39 | * |
| 40 | * @see ITmfEvent |
| 41 | * @see ITmfEventType |
| 42 | */ |
| 43 | public class TmfEventField implements ITmfEventField { |
| 44 | |
| 45 | // ------------------------------------------------------------------------ |
| 46 | // Attributes |
| 47 | // ------------------------------------------------------------------------ |
| 48 | |
| 49 | private final @NonNull String fName; |
| 50 | private final @Nullable Object fValue; |
| 51 | private final @NonNull Map<String, ITmfEventField> fFields; |
| 52 | |
| 53 | // ------------------------------------------------------------------------ |
| 54 | // Constructors |
| 55 | // ------------------------------------------------------------------------ |
| 56 | |
| 57 | /** |
| 58 | * Full constructor |
| 59 | * |
| 60 | * @param name |
| 61 | * the event field id |
| 62 | * @param value |
| 63 | * the event field value |
| 64 | * @param fields |
| 65 | * the list of subfields |
| 66 | * @throws IllegalArgumentException |
| 67 | * If 'name' is null, or if 'fields' has duplicate field names. |
| 68 | */ |
| 69 | public TmfEventField(@NonNull String name, @Nullable Object value, @Nullable ITmfEventField[] fields) { |
| 70 | fName = name; |
| 71 | fValue = value; |
| 72 | |
| 73 | if (fields == null) { |
| 74 | fFields = checkNotNull(ImmutableMap.<String, ITmfEventField> of()); |
| 75 | } else { |
| 76 | /* Java 8 streams will make this even more simple! */ |
| 77 | ImmutableMap.Builder<String, ITmfEventField> mapBuilder = new ImmutableMap.Builder<>(); |
| 78 | for (ITmfEventField field : fields) { |
| 79 | final String curName = field.getName(); |
| 80 | mapBuilder.put(curName, field); |
| 81 | } |
| 82 | fFields = checkNotNull(mapBuilder.build()); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Copy constructor |
| 88 | * |
| 89 | * @param field the other event field |
| 90 | */ |
| 91 | public TmfEventField(final TmfEventField field) { |
| 92 | if (field == null) { |
| 93 | throw new IllegalArgumentException(); |
| 94 | } |
| 95 | fName = field.fName; |
| 96 | fValue = field.fValue; |
| 97 | fFields = field.fFields; |
| 98 | } |
| 99 | |
| 100 | // ------------------------------------------------------------------------ |
| 101 | // ITmfEventField |
| 102 | // ------------------------------------------------------------------------ |
| 103 | |
| 104 | @Override |
| 105 | public String getName() { |
| 106 | return fName; |
| 107 | } |
| 108 | |
| 109 | @Override |
| 110 | public Object getValue() { |
| 111 | return fValue; |
| 112 | } |
| 113 | |
| 114 | @Override |
| 115 | public final Collection<String> getFieldNames() { |
| 116 | return checkNotNull(fFields.keySet()); |
| 117 | } |
| 118 | |
| 119 | @Override |
| 120 | public final Collection<ITmfEventField> getFields() { |
| 121 | return checkNotNull(fFields.values()); |
| 122 | } |
| 123 | |
| 124 | @Override |
| 125 | public ITmfEventField getField(final String... path) { |
| 126 | if (path.length == 1) { |
| 127 | return fFields.get(path[0]); |
| 128 | } |
| 129 | ITmfEventField field = this; |
| 130 | for (String name : path) { |
| 131 | field = field.getField(name); |
| 132 | if (field == null) { |
| 133 | return null; |
| 134 | } |
| 135 | } |
| 136 | return field; |
| 137 | } |
| 138 | |
| 139 | // ------------------------------------------------------------------------ |
| 140 | // Operations |
| 141 | // ------------------------------------------------------------------------ |
| 142 | |
| 143 | /** |
| 144 | * Create a root field from a list of labels. |
| 145 | * |
| 146 | * @param labels the list of labels |
| 147 | * @return the (flat) root list |
| 148 | */ |
| 149 | public static final ITmfEventField makeRoot(final String[] labels) { |
| 150 | final ITmfEventField[] fields = new ITmfEventField[labels.length]; |
| 151 | for (int i = 0; i < labels.length; i++) { |
| 152 | String label = checkNotNull(labels[i]); |
| 153 | fields[i] = new TmfEventField(label, null, null); |
| 154 | } |
| 155 | // Return a new root field; |
| 156 | return new TmfEventField(ITmfEventField.ROOT_FIELD_ID, null, fields); |
| 157 | } |
| 158 | |
| 159 | // ------------------------------------------------------------------------ |
| 160 | // Object |
| 161 | // ------------------------------------------------------------------------ |
| 162 | |
| 163 | @Override |
| 164 | public int hashCode() { |
| 165 | final int prime = 31; |
| 166 | int result = 1; |
| 167 | result = prime * result + getName().hashCode(); |
| 168 | result = prime * result + ObjectUtils.deepHashCode(getValue()); |
| 169 | result = prime * result + fFields.hashCode(); |
| 170 | return result; |
| 171 | } |
| 172 | |
| 173 | @Override |
| 174 | public boolean equals(final Object obj) { |
| 175 | if (this == obj) { |
| 176 | return true; |
| 177 | } |
| 178 | if (obj == null) { |
| 179 | return false; |
| 180 | } |
| 181 | |
| 182 | /* We only consider equals fields of the exact same class. */ |
| 183 | if (!(this.getClass().equals(obj.getClass()))) { |
| 184 | return false; |
| 185 | } |
| 186 | |
| 187 | final TmfEventField other = (TmfEventField) obj; |
| 188 | |
| 189 | /* Check that the field names are the same. */ |
| 190 | if (!NonNullUtils.equalsNullable(getName(), other.getName())) { |
| 191 | return false; |
| 192 | } |
| 193 | |
| 194 | /* |
| 195 | * Check that the field values are the same. We use ObjectUtils to |
| 196 | * handle cases where the Object values may be primitive and/or nested |
| 197 | * arrays. |
| 198 | */ |
| 199 | if (!ObjectUtils.deepEquals(this.getValue(), other.getValue())) { |
| 200 | return false; |
| 201 | } |
| 202 | |
| 203 | /* Check that sub-fields are the same. */ |
| 204 | if (!fFields.equals(other.fFields)) { |
| 205 | return false; |
| 206 | } |
| 207 | |
| 208 | return true; |
| 209 | } |
| 210 | |
| 211 | @Override |
| 212 | public String toString() { |
| 213 | StringBuilder ret = new StringBuilder(); |
| 214 | if (fName.equals(ITmfEventField.ROOT_FIELD_ID)) { |
| 215 | /* |
| 216 | * If this field is a top-level "field container", we will print its |
| 217 | * sub-fields directly. |
| 218 | */ |
| 219 | appendSubFields(ret); |
| 220 | |
| 221 | } else { |
| 222 | /* The field has its own values */ |
| 223 | ret.append(fName); |
| 224 | ret.append('='); |
| 225 | ret.append(fValue); |
| 226 | |
| 227 | if (!fFields.isEmpty()) { |
| 228 | /* |
| 229 | * In addition to its own name/value, this field also has |
| 230 | * sub-fields. |
| 231 | */ |
| 232 | ret.append(" ["); //$NON-NLS-1$ |
| 233 | appendSubFields(ret); |
| 234 | ret.append(']'); |
| 235 | } |
| 236 | } |
| 237 | return ret.toString(); |
| 238 | } |
| 239 | |
| 240 | private void appendSubFields(StringBuilder sb) { |
| 241 | Joiner joiner = Joiner.on(", ").skipNulls(); //$NON-NLS-1$ |
| 242 | sb.append(joiner.join(getFields())); |
| 243 | } |
| 244 | |
| 245 | @Override |
| 246 | public String getFormattedValue() { |
| 247 | return getValue().toString(); |
| 248 | } |
| 249 | |
| 250 | } |