1 files changed, 79 insertions, 0 deletions
diff --git a/src/main/java/com/amazon/carbonado/sequence/AbstractSequenceValueProducer.java b/src/main/java/com/amazon/carbonado/sequence/AbstractSequenceValueProducer.java
new file mode 100644
index 0000000..8deb3d7
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+++ b/src/main/java/com/amazon/carbonado/sequence/AbstractSequenceValueProducer.java
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+/*
+ * Copyright 2006 Amazon Technologies, Inc. or its affiliates.
+ * Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
+ * of Amazon Technologies, Inc. or its affiliates.  All rights reserved.
+ *
+ * Licensed 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 com.amazon.carbonado.sequence;
+
+import java.math.BigInteger;
+
+import com.amazon.carbonado.PersistException;
+
+/**
+ *
+ *
+ * @author Brian S O'Neill
+ */
+public abstract class AbstractSequenceValueProducer implements SequenceValueProducer {
+    protected AbstractSequenceValueProducer() {
+    }
+
+    public int nextIntValue() throws PersistException {
+        return (int) nextLongValue();
+    }
+
+    public String nextDecimalValue() throws PersistException {
+        return nextNumericalValue(10, 0);
+    }
+
+    public String nextNumericalValue(int radix, int minLength) throws PersistException {
+        long next = nextLongValue();
+        String str;
+
+        if (next >= 0) {
+            str = Long.toString(next, radix);
+        } else {
+            // Use BigInteger to print negative values as positive by expanding
+            // precision to 72 bits
+
+            byte[] bytes = new byte[9];
+            bytes[8] = (byte) (next & 0xff);
+            bytes[7] = (byte) ((next >>= 8) & 0xff);
+            bytes[6] = (byte) ((next >>= 8) & 0xff);
+            bytes[5] = (byte) ((next >>= 8) & 0xff);
+            bytes[4] = (byte) ((next >>= 8) & 0xff);
+            bytes[3] = (byte) ((next >>= 8) & 0xff);
+            bytes[2] = (byte) ((next >>= 8) & 0xff);
+            bytes[1] = (byte) ((next >>= 8) & 0xff);
+            //bytes[0] = 0;
+
+            str = new BigInteger(bytes).toString(radix);
+        }
+
+        int pad = minLength - str.length();
+
+        if (pad > 0) {
+            StringBuilder b = new StringBuilder(minLength);
+            while (--pad >= 0) {
+                b.append('0');
+            }
+            b.append(str);
+            str = b.toString();
+        }
+
+        return str;
+    }
+}