java/sql-dk/src/main/java/info/globalcode/sql/dk/configuration/FormatterDefinition.java
branchv_0
changeset 238 4a1864c3e867
parent 188 54bacc7ed42b
child 250 aae5009bd0af
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/sql-dk/src/main/java/info/globalcode/sql/dk/configuration/FormatterDefinition.java	Mon Mar 04 20:15:24 2019 +0100
@@ -0,0 +1,114 @@
+/**
+ * SQL-DK
+ * Copyright © 2013 František Kučera (frantovo.cz)
+ *
+ * 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 info.globalcode.sql.dk.configuration;
+
+import static info.globalcode.sql.dk.Xmlns.CONFIGURATION;
+import info.globalcode.sql.dk.formatting.Formatter;
+import info.globalcode.sql.dk.formatting.FormatterContext;
+import info.globalcode.sql.dk.formatting.FormatterException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import javax.xml.bind.annotation.XmlElement;
+
+/**
+ * Configured (but not yet instantiated) formatter.
+ *
+ * @author Ing. František Kučera (frantovo.cz)
+ */
+public class FormatterDefinition implements NameIdentified {
+
+	private String name;
+	private String className;
+	private Properties properties = new Properties();
+
+	public FormatterDefinition() {
+	}
+
+	public FormatterDefinition(String name, String className) {
+		this.name = name;
+		this.className = className;
+	}
+
+	public FormatterDefinition(String name, String className, Properties properties) {
+		this(name, className);
+		this.properties = properties;
+	}
+
+	@XmlElement(name = "name", namespace = CONFIGURATION)
+	@Override
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	/**
+	 * Filter's class. Must implement the
+	 * <code>info.globalcode.sql.dk.formatting.Formatter</code> interface.
+	 * Subclassing the
+	 * <code>info.globalcode.sql.dk.formatting.AbstractFormatter</code> is strongly recommended.
+	 * The constructor must accept one parameter:
+	 * <code>info.globalcode.sql.dk.formatting.FormatterContext</code>
+	 *
+	 * @return fully qualified class name
+	 */
+	@XmlElement(name = "class", namespace = CONFIGURATION)
+	public String getClassName() {
+		return className;
+	}
+
+	public void setClassName(String className) {
+		this.className = className;
+	}
+
+	@XmlElement(name = "property", namespace = CONFIGURATION)
+	public Properties getProperties() {
+		return properties;
+	}
+
+	public void setProperties(Properties properties) {
+		this.properties = properties;
+	}
+
+	/**
+	 * @param context
+	 * @return
+	 * @throws FormatterException
+	 */
+	public Formatter getInstance(FormatterContext context) throws FormatterException {
+		context.getProperties().setDefaults(properties);
+		try {
+			Constructor constructor = Class.forName(className).getConstructor(context.getClass());
+
+			Object instance = constructor.newInstance(context);
+			if (instance instanceof Formatter) {
+				return (Formatter) instance;
+			} else {
+				throw new FormatterException("Formatter " + instance + " does not implement the " + Formatter.class.getName() + " interface");
+			}
+		} catch (ClassNotFoundException e) {
+			throw new FormatterException("Formatter class does not exist: " + className, e);
+		} catch (NoSuchMethodException e) {
+			throw new FormatterException("Formatter class with no valid constructor: " + className, e);
+		} catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+			throw new FormatterException("Formatter's constructor caused an error: " + className, e);
+		}
+	}
+}