Created idgenerator package

src/opensesim/util/idgenerator/IDGenerator.java

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+/*
+ * Copyright (c) 2018, 7u83 <7u83@mail.ru>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package opensesim.util.idgenerator;
+
+/**
+ * Implementation of a simple ID generator to create uniqe IDs of type long
+ *
+ * @author 7u83 <7u83@mail.ru>
+ */
+public class IDGenerator {
+
+    private Long next_id;
+    private Long start_id;
+
+    /**
+     * Initialize the ID generator
+     *
+     * @param start ID value to start with
+     */
+    public IDGenerator(Long start) {
+        start_id=start;
+        reset();
+    }
+
+    /**
+     * Initialize ID Generator with start ID = 0
+     */
+    public IDGenerator() {
+        this(0L);
+    }
+
+    /**
+     * Reset the ID generator
+     */
+    protected final void reset() {
+        next_id = start_id;
+    }
+
+    /**
+     * Get the next ID
+     *
+     * @return the next generated ID
+     */
+    public synchronized Id getNext() {
+        return new Id<Long>(next_id++);
+    }
+}

src/opensesim/util/idgenerator/Id.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2018, 7u83 <7u83@mail.ru>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package opensesim.util.idgenerator;
+
+import java.util.Objects;
+
+/**
+ *
+ * @author 7u83 <7u83@mail.ru>
+ */
+public class Id<T extends Comparable> implements Comparable<Id> {
+
+    final T value;
+
+    Id(T id) {
+        value = id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o.getClass() != Id.class) {
+            return false;
+        }
+        return Objects.equals(value, ((Id) o).value);
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 47 * hash + Objects.hashCode(this.value);
+        return hash;
+    }
+
+    @Override
+    public String toString() {
+        return value.toString();
+    }
+
+    @Override
+    public int compareTo(Id o) {
+        return value.compareTo(o);
+    }
+
+}
+
+
+