--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/src/main/java/digilib/util/Parameter.java	Tue Apr 26 20:24:31 2011 +0200
@@ -0,0 +1,284 @@
+/* Parameter -- General digilib parameter class.
+
+ Digital Image Library servlet components
+
+ Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de)
+
+ 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 2 of the  License, or (at your
+ option) any later version.
+ 
+ Please read license.txt for the full details. A copy of the GPL
+ may be found at http://www.gnu.org/copyleft/lgpl.html
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ 
+ *
+ * Created on 02.09.2003 by casties
+ * 
+ */
+package digilib.util;
+
+import java.io.File;
+import java.io.IOException;
+
+
+/**
+ * General digilib parameter class.
+ * 
+ * @author casties
+ *  
+ */
+public class Parameter {
+	/** real value */
+	protected Object value = null;
+
+	/** default value */
+	protected Object defval = null;
+
+	/** parameter name (e.g. in config file) */
+	protected String name = null;
+
+	/** parameter type */
+	protected int type = 0;
+
+	/**
+	 * Default constructor.
+	 *  
+	 */
+	public Parameter() {
+		super();
+	}
+
+	/**
+	 * Constructor with name, default, and value.
+	 * 
+	 * @param value
+	 * @param defval
+	 */
+	public Parameter(String name, Object defval, Object value) {
+		this.name = name;
+		this.value = value;
+		this.defval = defval;
+	}
+
+	/**
+	 * Constructor with name, default, value, and type.
+	 * 
+	 * @param value
+	 * @param defval
+	 */
+	public Parameter(String name, Object defval, Object value, int type) {
+		this.name = name;
+		this.value = value;
+		this.defval = defval;
+		this.type = type;
+	}
+
+	/**
+	 * Is the value valid.
+	 * 
+	 * @return
+	 */
+	public boolean hasValue() {
+		return (value != null);
+	}
+
+	/**
+	 * Try to set the value from a String.
+	 * 
+	 * Tries to convert the String to the same type as the default value. Sets
+	 * the value anyway if the default is null. Returns if the value could be
+	 * set.
+	 * 
+	 * @param val
+	 * @return
+	 */
+	public boolean setValueFromString(String val) {
+		if (val == null) {
+			val = "";
+		}
+		// no default matches all
+		if (defval == null) {
+			this.value = val;
+			return true;
+		}
+		Class<? extends Object> c = defval.getClass();
+		// take String as is
+		if (c == String.class) {
+			this.value = val;
+			return true;
+		}
+		// set File
+		if (c == File.class) {
+			this.value = new File(val);
+			return true;
+		}
+		// set Options
+		if (c == OptionsSet.class) {
+			this.value = new OptionsSet(val);
+			return true;
+		}
+		// set Boolean if string == "true"
+		if (c == Boolean.class) {
+			this.value = new Boolean(val.compareToIgnoreCase("true") == 0);
+			return true;
+		}
+		try {
+			// set Integer
+			if (c == Integer.class) {
+				this.value = new Integer(Integer.parseInt(val));
+				return true;
+			}
+			// set Float
+			if (c == Float.class) {
+				this.value = new Float(Float.parseFloat(val));
+				return true;
+			}
+		} catch (NumberFormatException e) {
+		}
+		// then it's unknown
+		return false;
+	}
+
+	/**
+	 * Get the default as Object.
+	 * 
+	 * @return
+	 */
+	public Object getDefault() {
+		return defval;
+	}
+
+	/**
+	 * Set the default.
+	 * 
+	 * @param defval
+	 */
+	public void setDefault(Object defval) {
+		this.defval = defval;
+	}
+
+	/**
+	 * Get the value as Object.
+	 * 
+	 * Returns the default if the value is not set.
+	 * 
+	 * @return
+	 */
+	public Object getValue() {
+		return (value != null) ? value : defval;
+	}
+
+	public int getAsInt() {
+		Integer i = (Integer) getValue();
+		return (i != null) ? i.intValue() : 0;
+	}
+
+	public float getAsFloat() {
+		Float f = (Float) getValue();
+		return (f != null) ? f.floatValue() : 0f;
+	}
+
+	public String getAsString() {
+		Object s = getValue();
+		if (s == null) {
+			return "";
+		}
+		if (s.getClass() == File.class) {
+			try {
+				return ((File) s).getCanonicalPath();
+			} catch (IOException e) {
+				return "ERR: " + s.toString();
+			}
+		}
+		return s.toString();
+	}
+
+	public boolean getAsBoolean() {
+		Boolean b = (Boolean) getValue();
+		return (b != null) ? b.booleanValue() : false;
+	}
+
+	public String[] parseAsArray(String separator) {
+		String s = getAsString();
+		String[] sa = s.split(separator);
+		return sa;
+	}
+
+	public float[] parseAsFloatArray(String separator) {
+		String s = getAsString();
+		String[] sa = s.split(separator);
+		float[] fa = null;
+		try {
+			int n = sa.length;
+			fa = new float[n];
+			for (int i = 0; i < n; i++) {
+				float f = Float.parseFloat(sa[i]);
+				fa[i] = f;
+			}
+		} catch (Exception e) {
+		}
+
+		return fa;
+	}
+
+	/**
+	 * Set the value.
+	 * 
+	 * @param value
+	 */
+	public void setValue(Object value) {
+		this.value = value;
+	}
+
+	/**
+	 * Set the value.
+	 * 
+	 * @param value
+	 */
+	public void setValue(int value) {
+		this.value = new Integer(value);
+	}
+
+	/**
+	 * Set the value.
+	 * 
+	 * @param value
+	 */
+	public void setValue(float value) {
+		this.value = new Float(value);
+	}
+
+	/**
+	 * @return
+	 */
+	public String getName() {
+		return name;
+	}
+
+	/**
+	 * @param name
+	 */
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	/**
+	 * @return
+	 */
+	public int getType() {
+		return type;
+	}
+
+	/**
+	 * @param type
+	 */
+	public void setType(int type) {
+		this.type = type;
+	}
+
+}