1 files changed, 165 insertions, 0 deletions
diff --git a/src/com/kenai/jbosh/AttrVersion.java b/src/com/kenai/jbosh/AttrVersion.java
new file mode 100644
index 0000000..9396e3b
--- /dev/null
+++ b/src/com/kenai/jbosh/AttrVersion.java
@@ -0,0 +1,165 @@
+/*
+ * Copyright 2009 Mike Cumings
+ *
+ * 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.kenai.jbosh;
+
+/**
+ * Data type representing the getValue of the {@code ver} attribute of the
+ * {@code bosh} element.
+ */
+final class AttrVersion extends AbstractAttr<String> implements Comparable {
+
+    /**
+     * Default value if none is provided.
+     */
+    private static final AttrVersion DEFAULT;
+    static {
+        try {
+            DEFAULT = createFromString("1.8");
+        } catch (BOSHException boshx) {
+            throw(new IllegalStateException(boshx));
+        }
+    }
+
+    /**
+     * Major portion of the version.
+     */
+    private final int major;
+    
+    /**
+     * Minor portion of the version.
+     */
+    private final int minor;
+
+    /**
+     * Creates a new attribute object.
+     * 
+     * @param val attribute getValue
+     * @throws BOSHException on parse or validation failure
+     */
+    private AttrVersion(final String val) throws BOSHException {
+        super(val);
+
+        int idx = val.indexOf('.');
+        if (idx <= 0) {
+            throw(new BOSHException(
+                    "Illegal ver attribute value (not in major.minor form): "
+                    + val));
+        }
+
+        String majorStr = val.substring(0, idx);
+        try {
+            major = Integer.parseInt(majorStr);
+        } catch (NumberFormatException nfx) {
+            throw(new BOSHException(
+                    "Could not parse ver attribute value (major ver): "
+                    + majorStr,
+                    nfx));
+        }
+        if (major < 0) {
+            throw(new BOSHException(
+                    "Major version may not be < 0"));
+        }
+
+        String minorStr = val.substring(idx + 1);
+        try {
+            minor = Integer.parseInt(minorStr);
+        } catch (NumberFormatException nfx) {
+            throw(new BOSHException(
+                    "Could not parse ver attribute value (minor ver): "
+                    + minorStr,
+                    nfx));
+        }
+        if (minor < 0) {
+            throw(new BOSHException(
+                    "Minor version may not be < 0"));
+        }
+    }
+    
+    /**
+     * Get the version of specifcation that we support.
+     *
+     * @return max spec version the code supports
+     */
+    static AttrVersion getSupportedVersion() {
+        return DEFAULT;
+    }
+
+    /**
+     * Creates a new attribute instance from the provided String.
+     * 
+     * @param str string representation of the attribute
+     * @return attribute instance or {@code null} if provided string is
+     *  {@code null}
+     * @throws BOSHException on parse or validation failure
+     */
+    static AttrVersion createFromString(final String str)
+    throws BOSHException {
+        if (str == null) {
+            return null;
+        } else {
+            return new AttrVersion(str);
+        }
+    }
+
+    /**
+     * Returns the 'major' portion of the version number.
+     *
+     * @return major digits only
+     */
+    int getMajor() {
+        return major;
+    }
+
+    /**
+     * Returns the 'minor' portion of the version number.
+     *
+     * @return minor digits only
+     */
+    int getMinor() {
+        return minor;
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Comparable interface:
+
+    /**
+     * {@inheritDoc}
+     *
+     * @param otherObj object to compare to
+     * @return -1, 0, or 1
+     */
+    @Override
+    public int compareTo(final Object otherObj) {
+        if (otherObj instanceof AttrVersion) {
+            AttrVersion other = (AttrVersion) otherObj;
+            if (major < other.major) {
+                return -1;
+            } else if (major > other.major) {
+                return 1;
+            } else if (minor < other.minor) {
+                return -1;
+            } else if (minor > other.minor) {
+                return 1;
+            } else {
+                return 0;
+            }
+        } else {
+            return 0;
+        }
+    }
+
+}