Update #0 - First Release

sources/main/java/com/google/common/base/StandardSystemProperty.java

@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2012 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.base;
+
+import com.google.common.annotations.Beta;
+import com.google.common.annotations.GwtIncompatible;
+
+/**
+ * Represents a {@linkplain System#getProperties() standard system property}.
+ *
+ * @author Kurt Alfred Kluever
+ * @since 15.0
+ */
+@Beta
+@GwtIncompatible("java.lang.System#getProperty")
+public enum StandardSystemProperty {
+
+	/** Java Runtime Environment version. */
+	JAVA_VERSION("java.version"),
+
+	/** Java Runtime Environment vendor. */
+	JAVA_VENDOR("java.vendor"),
+
+	/** Java vendor URL. */
+	JAVA_VENDOR_URL("java.vendor.url"),
+
+	/** Java installation directory. */
+	JAVA_HOME("java.home"),
+
+	/** Java Virtual Machine specification version. */
+	JAVA_VM_SPECIFICATION_VERSION("java.vm.specification.version"),
+
+	/** Java Virtual Machine specification vendor. */
+	JAVA_VM_SPECIFICATION_VENDOR("java.vm.specification.vendor"),
+
+	/** Java Virtual Machine specification name. */
+	JAVA_VM_SPECIFICATION_NAME("java.vm.specification.name"),
+
+	/** Java Virtual Machine implementation version. */
+	JAVA_VM_VERSION("java.vm.version"),
+
+	/** Java Virtual Machine implementation vendor. */
+	JAVA_VM_VENDOR("java.vm.vendor"),
+
+	/** Java Virtual Machine implementation name. */
+	JAVA_VM_NAME("java.vm.name"),
+
+	/** Java Runtime Environment specification version. */
+	JAVA_SPECIFICATION_VERSION("java.specification.version"),
+
+	/** Java Runtime Environment specification vendor. */
+	JAVA_SPECIFICATION_VENDOR("java.specification.vendor"),
+
+	/** Java Runtime Environment specification name. */
+	JAVA_SPECIFICATION_NAME("java.specification.name"),
+
+	/** Java class format version number. */
+	JAVA_CLASS_VERSION("java.class.version"),
+
+	/** Java class path. */
+	JAVA_CLASS_PATH("java.class.path"),
+
+	/** List of paths to search when loading libraries. */
+	JAVA_LIBRARY_PATH("java.library.path"),
+
+	/** Default temp file path. */
+	JAVA_IO_TMPDIR("java.io.tmpdir"),
+
+	/** Name of JIT compiler to use. */
+	JAVA_COMPILER("java.compiler"),
+
+	/** Path of extension directory or directories. */
+	JAVA_EXT_DIRS("java.ext.dirs"),
+
+	/** Operating system name. */
+	OS_NAME("os.name"),
+
+	/** Operating system architecture. */
+	OS_ARCH("os.arch"),
+
+	/** Operating system version. */
+	OS_VERSION("os.version"),
+
+	/** File separator ("/" on UNIX). */
+	FILE_SEPARATOR("file.separator"),
+
+	/** Path separator (":" on UNIX). */
+	PATH_SEPARATOR("path.separator"),
+
+	/** Line separator ("\n" on UNIX). */
+	LINE_SEPARATOR("line.separator"),
+
+	/** User's account name. */
+	USER_NAME("user.name"),
+
+	/** User's home directory. */
+	USER_HOME("user.home"),
+
+	/** User's current working directory. */
+	USER_DIR("user.dir");
+
+	private final String key;
+
+	private StandardSystemProperty(String key) {
+		this.key = key;
+	}
+
+	/**
+	 * Returns the key used to lookup this system property.
+	 */
+	public String key() {
+		return key;
+	}
+
+	/**
+	 * Returns the current value for this system property by delegating to
+	 * {@link System#getProperty(String)}.
+	 */
+	public String value() {
+		return System.getProperty(key);
+	}
+
+	/**
+	 * Returns a string representation of this system property.
+	 */
+	@Override
+	public String toString() {
+		return key() + "=" + value();
+	}
+}