Moved meta data about the NVD CVE into a database table rather then an external properties file

Former-commit-id: ccef3663d13f8176b3e4f06bd5b9db4c23b207d5

dependency-check-core/src/main/java/org/owasp/dependencycheck/data/nvdcve/DatabaseProperties.java

@@ -0,0 +1,122 @@
+/*
+ * This file is part of dependency-check-core.
+ *
+ * Dependency-check-core 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.
+ *
+ * Dependency-check-core 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
+ * dependency-check-core. If not, see http://www.gnu.org/licenses/.
+ *
+ * Copyright (c) 2013 Jeremy Long. All Rights Reserved.
+ */
+package org.owasp.dependencycheck.data.nvdcve;
+
+import java.util.Properties;
+import org.owasp.dependencycheck.data.UpdateException;
+import org.owasp.dependencycheck.data.update.NvdCveInfo;
+
+/**
+ * This is a wrapper around a set of properties that are stored in the database.
+ *
+ * @author Jeremy Long (jeremy.long@owasp.org)
+ */
+public class DatabaseProperties {
+
+    /**
+     * Modified key word, used as a key to store information about the modified
+     * file (i.e. the containing the last 8 days of updates)..
+     */
+    public static final String MODIFIED = "modified";
+    /**
+     * The properties file key for the last updated field - used to store the
+     * last updated time of the Modified NVD CVE xml file.
+     */
+    public static final String LAST_UPDATED = "lastupdated.modified";
+    /**
+     * Stores the last updated time for each of the NVD CVE files. These
+     * timestamps should be updated if we process the modified file within 7
+     * days of the last update.
+     */
+    public static final String LAST_UPDATED_BASE = "lastupdated.";
+    /**
+     * A collection of properties about the data.
+     */
+    private Properties properties;
+    /**
+     * A reference to the database.
+     */
+    private CveDB cveDB;
+
+    /**
+     * Constructs a new data properties object.
+     *
+     * @param cveDB the database object holding the properties
+     */
+    DatabaseProperties(CveDB cveDB) {
+        this.cveDB = cveDB;
+        loadProperties();
+    }
+
+    /**
+     * Loads the properties from the database.
+     */
+    private void loadProperties() {
+        this.properties = cveDB.getProperties();
+    }
+
+    /**
+     * Returns whether or not any properties are set.
+     *
+     * @return whether or not any properties are set
+     */
+    public boolean isEmpty() {
+        return properties == null || properties.isEmpty();
+    }
+
+    /**
+     * Writes a properties file containing the last updated date to the
+     * VULNERABLE_CPE directory.
+     *
+     * @param updatedValue the updated NVD CVE entry
+     * @throws UpdateException is thrown if there is an update exception
+     */
+    public void save(NvdCveInfo updatedValue) throws UpdateException {
+        if (updatedValue == null) {
+            return;
+        }
+        properties.put("version", CveDB.DB_SCHEMA_VERSION);
+        properties.put(LAST_UPDATED_BASE + updatedValue.getId(), String.valueOf(updatedValue.getTimestamp()));
+        cveDB.saveProperty("version", CveDB.DB_SCHEMA_VERSION);
+        cveDB.saveProperty(LAST_UPDATED_BASE + updatedValue.getId(), String.valueOf(updatedValue.getTimestamp()));
+    }
+
+    /**
+     * Returns the property value for the given key. If the key is not contained
+     * in the underlying properties null is returned.
+     *
+     * @param key the property key
+     * @return the value of the property
+     */
+    public String getProperty(String key) {
+        return properties.getProperty(key);
+    }
+
+    /**
+     * Returns the property value for the given key. If the key is not contained
+     * in the underlying properties the default value is returned.
+     *
+     * @param key the property key
+     * @param defaultValue the default value
+     * @return the value of the property
+     */
+    public String getProperty(String key, String defaultValue) {
+        return properties.getProperty(key, defaultValue);
+    }
+}