/**
* Execute Script Loads environment and saves result
*
* @return null or Exception
*/
public Exception execute() {
m_result = null;
if (m_variable == null
|| m_variable.length() == 0
|| m_script == null
|| m_script.length() == 0) {
IllegalArgumentException e = new IllegalArgumentException("No variable/script");
log.config(e.toString());
return e;
}
Interpreter i = new Interpreter();
loadEnvironment(i);
try {
log.config(m_script);
i.eval(m_script);
} catch (Exception e) {
log.config(e.toString());
return e;
}
try {
m_result = i.get(m_variable);
log.config("Result (" + m_result.getClass().getName() + ") " + m_result);
} catch (Exception e) {
log.config("Result - " + e);
if (e instanceof NullPointerException)
e = new IllegalArgumentException("Result Variable not found - " + m_variable);
return e;
}
return null;
} // execute
/**
* Set Environment for Interpreter
*
* @param i Interpreter
*/
private void loadEnvironment(Interpreter i) {
if (m_ctx == null) return;
Iterator<String> it = m_ctx.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
Object value = m_ctx.get(key);
try {
if (value instanceof Boolean) i.set(key, ((Boolean) value).booleanValue());
else if (value instanceof Integer) i.set(key, ((Integer) value).intValue());
else if (value instanceof Double) i.set(key, ((Double) value).doubleValue());
else i.set(key, value);
} catch (EvalError ee) {
log.log(Level.SEVERE, "", ee);
}
}
} // setEnvironment
/**
* Script Model
*
* @author Jorg Janke
* @version $Id: Scriptlet.java,v 1.2 2006/07/30 00:51:03 jjanke Exp $
*/
public class Scriptlet {
/**
* Run Script
*
* @param variable
* @param script
* @param ctx
* @param WindowNo Included Window variables
* @return result
*/
static Object run(String variable, String script, Ctx ctx, int WindowNo) {
Scriptlet scr = new Scriptlet(variable, script, ctx, WindowNo);
scr.execute();
return scr.getResult(false);
} // run
/** Constructor */
public Scriptlet() {
this(VARIABLE, "", Env.getCtx(), 0);
} // Scriptlet
/** Default Result Variable Name */
public static final String VARIABLE = "result";
/** Logger */
private static CLogger log = CLogger.getCLogger(Scriptlet.class);
/**
* Full Constructor
*
* @param variable Variable Name
* @param script The Script
* @param ctx Context
* @param WindowNo Included Window variables
*/
public Scriptlet(String variable, String script, Ctx ctx, int WindowNo) {
setVariable(variable);
setScript(script);
setEnvironment(ctx, WindowNo);
} // Scriptlet
/**
* Full Constructor
*
* @param variable Variable Name
* @param script The Script
* @param ctx Environment
*/
public Scriptlet(String variable, String script, HashMap<String, Object> ctx) {
setVariable(variable);
setScript(script);
setEnvironment(ctx);
} // Scriptlet
/** Variable */
private String m_variable;
/** Script */
private String m_script;
/** Context */
private HashMap<String, Object> m_ctx;
/** Result */
private Object m_result;
/** ********************************************************************** */
/**
* Execute Script Loads environment and saves result
*
* @return null or Exception
*/
public Exception execute() {
m_result = null;
if (m_variable == null
|| m_variable.length() == 0
|| m_script == null
|| m_script.length() == 0) {
IllegalArgumentException e = new IllegalArgumentException("No variable/script");
log.config(e.toString());
return e;
}
Interpreter i = new Interpreter();
loadEnvironment(i);
try {
log.config(m_script);
i.eval(m_script);
} catch (Exception e) {
log.config(e.toString());
return e;
}
try {
m_result = i.get(m_variable);
log.config("Result (" + m_result.getClass().getName() + ") " + m_result);
} catch (Exception e) {
log.config("Result - " + e);
if (e instanceof NullPointerException)
e = new IllegalArgumentException("Result Variable not found - " + m_variable);
return e;
}
return null;
} // execute
/**
* Set Environment for Interpreter
*
* @param i Interpreter
*/
private void loadEnvironment(Interpreter i) {
if (m_ctx == null) return;
Iterator<String> it = m_ctx.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
Object value = m_ctx.get(key);
try {
if (value instanceof Boolean) i.set(key, ((Boolean) value).booleanValue());
else if (value instanceof Integer) i.set(key, ((Integer) value).intValue());
else if (value instanceof Double) i.set(key, ((Double) value).doubleValue());
else i.set(key, value);
} catch (EvalError ee) {
log.log(Level.SEVERE, "", ee);
}
}
} // setEnvironment
/** ********************************************************************** */
/**
* Get Variable
*
* @return variable
*/
public String getVariable() {
return m_variable;
} // getVariable
/**
* Set Variable
*
* @param variable - if null set to VARIABLE
*/
public void setVariable(String variable) {
if (variable == null || variable.length() == 0) m_variable = VARIABLE;
else m_variable = variable;
}
/**
* Set Script
*
* @param script
*/
public void setScript(String script) {
if (script == null) m_script = "";
else m_script = script;
} // setScript
/**
* Get Script
*
* @return script
*/
public String getScript() {
return m_script;
} // getScript
/**
* Set Environment
*
* @param prop
* @param WindowNo included Window variables
*/
public void setEnvironment(Ctx prop, int WindowNo) {
if (prop == null) prop = Env.getCtx();
m_ctx = new HashMap<String, Object>();
// Convert properties to HashMap
Iterator<String> it = prop.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
// filter
if (key == null
|| key.length() == 0
|| key.startsWith("P") // Preferences
|| (key.indexOf("|") != -1
&& !key.startsWith(String.valueOf(WindowNo))) // other Window Settings
) continue;
String value = prop.getContext(key);
setEnvironment(key, value);
}
} // setEnvironment
/**
* Set Environment key to value
*
* @param key variable name ('#' will be converted to '_')
* @param stringValue try to convert to Object
*/
public void setEnvironment(String key, String stringValue) {
if (key == null || key.length() == 0) return;
// log.fine( "Scriptlet.setEnvironment " + key, stringValue);
if (stringValue == null) {
m_ctx.remove(key);
return;
}
// Boolean
if (stringValue.equals("Y")) {
m_ctx.put(convertKey(key), Boolean.valueOf(true));
return;
}
if (stringValue.equals("N")) {
m_ctx.put(convertKey(key), Boolean.valueOf(false));
return;
}
// Timestamp
Timestamp timeValue = null;
try {
timeValue = Timestamp.valueOf(stringValue);
m_ctx.put(convertKey(key), timeValue);
return;
} catch (Exception e) {
}
// Numeric
Integer intValue = null;
try {
intValue = Integer.valueOf(stringValue);
} catch (NumberFormatException e) {
}
Double doubleValue = null;
try {
doubleValue = Double.valueOf(stringValue);
} catch (NumberFormatException e) {
}
if (doubleValue != null) {
if (intValue != null) {
double di = Double.parseDouble(intValue.toString());
// the numbers are the same -> integer
if (Double.compare(di, doubleValue.doubleValue()) == 0) {
m_ctx.put(convertKey(key), intValue);
return;
}
}
m_ctx.put(convertKey(key), doubleValue);
return;
}
if (intValue != null) {
m_ctx.put(convertKey(key), intValue);
return;
}
m_ctx.put(convertKey(key), stringValue);
} // SetEnvironment
/**
* Set Environment key to value
*
* @param key variable name ('#' will be vonverted to '_')
* @param value
*/
public void setEnvironment(String key, Object value) {
if (key != null && key.length() > 0) {
// log.fine( "Scriptlet.setEnvironment " + key, value);
if (value == null) m_ctx.remove(key);
else m_ctx.put(convertKey(key), value);
}
} // SetEnvironment
/**
* Convert Key # -> _
*
* @param key
* @return converted key
*/
private String convertKey(String key) {
String retValue = Util.replace(key, "#", "_");
return retValue;
} // convertKey
/**
* Set Environment
*
* @param ctx
*/
public void setEnvironment(HashMap<String, Object> ctx) {
if (ctx == null) m_ctx = new HashMap<String, Object>();
else m_ctx = ctx;
} // setEnvironment
/**
* Get Environment
*
* @return environment
*/
public HashMap<String, Object> getEnvironment() {
return m_ctx;
} // getEnvironment
/**
* ************************************************************************ Get Result
*
* @param runIt if true, execute script
* @return result or null
*/
public Object getResult(boolean runIt) {
if (runIt) execute();
return m_result;
} // getResult
/**
* String Representation incl. Result
*
* @return Scipt
*/
@Override
public String toString() {
StringBuffer sb = new StringBuffer(m_variable);
sb.append(" { ").append(m_script).append(" } = ").append(getResult(true));
return sb.toString();
} // toString
} // Scriptlet
