Add a file state.

diff --git a/src/main/java/net/pterodactylus/reactor/states/FileState.java b/src/main/java/net/pterodactylus/reactor/states/FileState.java
new file mode 100644 (file)
index 0000000..b0c439e
--- /dev/null
+++ b/src/main/java/net/pterodactylus/reactor/states/FileState.java
@@ -0,0 +1,117 @@
+/*
+ * Reactor - FileState.java - Copyright © 2013 David Roden
+ *
+ * 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/>.
+ */
+
+package net.pterodactylus.reactor.states;
+
+import net.pterodactylus.reactor.State;
+
+/**
+ * A {@link State} that contains information about a file.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class FileState extends AbstractState {
+
+       /** Whether the file exists. */
+       private final boolean exists;
+
+       /** Whether the file is readable. */
+       private final boolean readable;
+
+       /** The size of the file. */
+       private final long size;
+
+       /** The modification time of the file. */
+       private final long modificationTime;
+
+       /**
+        * Creates a new file state that signals that an exceptio occured during
+        * retrieval.
+        *
+        * @param exception
+        *            The exception that occured
+        */
+       public FileState(Throwable exception) {
+               super(exception);
+               exists = false;
+               readable = false;
+               size = -1;
+               modificationTime = -1;
+       }
+
+       /**
+        * Creates a new file state.
+        *
+        * @param exists
+        *            {@code true} if the file exists, {@code false} otherwise
+        * @param readable
+        *            {@code true} if the file is readable, {@code false} otherwise
+        * @param size
+        *            The size of the file (in bytes)
+        * @param modificationTime
+        *            The modification time of the file (in milliseconds since Jan
+        *            1, 1970 UTC)
+        */
+       public FileState(boolean exists, boolean readable, long size, long modificationTime) {
+               this.exists = exists;
+               this.readable = readable;
+               this.size = size;
+               this.modificationTime = modificationTime;
+       }
+
+       //
+       // ACCESSORS
+       //
+
+       /**
+        * Returns whether the file exists.
+        *
+        * @return {@code true} if the file exists, {@code false} otherwise
+        */
+       public boolean exists() {
+               return exists;
+       }
+
+       /**
+        * Returns whether the file is readable.
+        *
+        * @return {@code true} if the file is readable, {@code false} otherwise
+        */
+       public boolean readable() {
+               return readable;
+       }
+
+       /**
+        * Returns the size of the file.
+        *
+        * @return The size of the file (in bytes)
+        */
+       public long size() {
+               return size;
+       }
+
+       /**
+        * Returns the modification time of the file.
+        *
+        * @return The modification time of the file (in milliseconds since Jan 1,
+        *         1970 UTC)
+        */
+       public long modificationTime() {
+               return modificationTime;
+       }
+
+}