Update #0 - First Release

sources/main/java/com/google/common/hash/AbstractHasher.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2011 The Guava Authors
+ *
+ * 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.google.common.hash;
+
+import java.nio.charset.Charset;
+
+/**
+ * An abstract hasher, implementing {@link #putBoolean(boolean)},
+ * {@link #putDouble(double)}, {@link #putFloat(float)},
+ * {@link #putUnencodedChars(CharSequence)}, and
+ * {@link #putString(CharSequence, Charset)} as prescribed by {@link Hasher}.
+ *
+ * @author Dimitris Andreou
+ */
+abstract class AbstractHasher implements Hasher {
+	@Override
+	public final Hasher putBoolean(boolean b) {
+		return putByte(b ? (byte) 1 : (byte) 0);
+	}
+
+	@Override
+	public final Hasher putDouble(double d) {
+		return putLong(Double.doubleToRawLongBits(d));
+	}
+
+	@Override
+	public final Hasher putFloat(float f) {
+		return putInt(Float.floatToRawIntBits(f));
+	}
+
+	@Override
+	public Hasher putUnencodedChars(CharSequence charSequence) {
+		for (int i = 0, len = charSequence.length(); i < len; i++) {
+			putChar(charSequence.charAt(i));
+		}
+		return this;
+	}
+
+	@Override
+	public Hasher putString(CharSequence charSequence, Charset charset) {
+		return putBytes(charSequence.toString().getBytes(charset));
+	}
+}