Differential D4006 Diff 19063 java/src/main/java/org/softwareheritage/graph/labels/AbstractLongListLabel.java

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java/src/main/java/org/softwareheritage/graph/labels/AbstractLongListLabel.java

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				// TODO: should be in webgraph upstream
				// package it.unimi.dsi.big.webgraph.labelling;
				package org.softwareheritage.graph.labels;

				/*
				* Copyright (C) 2020 TODO
				*
				* This program is free software; you can redistribute it and/or modify it
				* under the terms of the GNU General Public License as published by the Free
				* Software Foundation; either version 3 of the License, or (at your option)
				* any later version.
				*
				* This program is distributed in the hope that it will be useful, but
				* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
				* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
				* for more details.
				*
				* You should have received a copy of the GNU General Public License
				* along with this program; if not, see <http://www.gnu.org/licenses/>.
				*
				*/

				import it.unimi.dsi.big.webgraph.labelling.AbstractLabel;
				import it.unimi.dsi.big.webgraph.labelling.Label;

				import java.util.Arrays;

				/** An abstract (single-attribute) list-of-longs label.
				*
				* <p>This class provides basic methods for a label holding a list of longs.
				* Concrete implementations may impose further requirements on the long.
				*
				* <p>Implementing subclasses must provide constructors, {@link Label#copy()},
				* {@link Label#fromBitStream(it.unimi.dsi.io.InputBitStream, int)}, {@link Label#toBitStream(it.unimi.dsi.io.OutputBitStream, int)}
				* and possibly override {@link #toString()}.
				*/

				public abstract class AbstractLongListLabel extends AbstractLabel implements Label {
				/** The key of the attribute represented by this label. */
				protected final String key;
				/** The values of the attribute represented by this label. */
				public long[] value;

				/** Creates an long label with given key and value.
				*
				* @param key the (only) key of this label.
				* @param value the value of this label.
				*/
				public AbstractLongListLabel(String key, long[] value) {
				this.key = key;
				this.value = value;
				}

				@Override
				public String wellKnownAttributeKey() {
				return key;
				}

				@Override
				public String[] attributeKeys() {
				return new String[] { key };
				}

				@Override
				public Class<?>[] attributeTypes() {
				return new Class[] { long[].class };
				}

				@Override
				public Object get(String key) {
				if (this.key.equals(key)) return value;
				throw new IllegalArgumentException();
				}

				@Override
				public Object get() {
				return value;
				}

				@Override
				public String toString() {
				return key + ":" + Arrays.toString(value);
				}

				@Override
				public boolean equals(Object x) {
				if (x instanceof AbstractLongListLabel) return Arrays.equals(value, ((AbstractLongListLabel)x).value);
				else return false;
				}

				@Override
				public int hashCode() {
				return Arrays.hashCode(value);
				}
				}