/**
* Caches a block of code, returning a handle that can be passed to runCachedBlock().
*
* @param id An identifier. If null, a unique identifier is generated
* @param code The code
* @param namespace If true, the namespace will be set
* @return Description of the Return Value
* @exception Exception instances are thrown when various BeanShell errors occur
* @since jEdit 4.1pre1
*/
public BshMethod cacheBlock(String id, String code, boolean namespace) throws Exception {
String name = "__internal_" + id;
// evaluate a method declaration
if (namespace) {
_eval(global, name + "(ns) {\nthis.callstack.set(0,ns);\n" + code + "\n}");
return global.getMethod(name, new Class[] {NameSpace.class});
} else {
_eval(global, name + "() {\n" + code + "\n}");
return global.getMethod(name, new Class[0]);
}
} // }}}
/**
* A command is a scripted method or compiled command class implementing a specified method
* signature. Commands are loaded from the classpath and may be imported using the
* importCommands() method.
*
* <p>This method searches the imported commands packages for a script or command object
* corresponding to the name of the method. If it is a script the script is sourced into this
* namespace and the BshMethod for the requested signature is returned. If it is a compiled class
* the class is returned. (Compiled command classes implement static invoke() methods).
*
* <p>The imported packages are searched in reverse order, so that later imports take priority.
* Currently only the first object (script or class) with the appropriate name is checked. If
* another, overloaded form, is located in another package it will not currently be found. This
* could be fixed.
*
* <p>
*
* @return a BshMethod, Class, or null if no such command is found.
* @param name is the name of the desired command method
* @param argTypes is the signature of the desired command method.
* @throws UtilEvalError if loadScriptedCommand throws UtilEvalError i.e. on errors loading a
* script that was found
*/
public Object getCommand(String name, Class[] argTypes, Interpreter interpreter)
throws UtilEvalError {
if (Interpreter.DEBUG) Interpreter.debug("getCommand: " + name);
BshClassManager bcm = interpreter.getClassManager();
if (importedCommands != null) {
// loop backwards for precedence
for (int i = importedCommands.size() - 1; i >= 0; i--) {
String path = importedCommands.get(i);
String scriptPath;
if (path.equals("/")) scriptPath = path + name + ".bsh";
else scriptPath = path + "/" + name + ".bsh";
Interpreter.debug("searching for script: " + scriptPath);
InputStream in = bcm.getResourceAsStream(scriptPath);
if (in != null) return loadScriptedCommand(in, name, argTypes, scriptPath, interpreter);
// Chop leading "/" and change "/" to "."
String className;
if (path.equals("/")) className = name;
else className = path.substring(1).replace('/', '.') + "." + name;
Interpreter.debug("searching for class: " + className);
Class clas = bcm.classForName(className);
if (clas != null) return clas;
}
}
if (parent != null) return parent.getCommand(name, argTypes, interpreter);
else return null;
}
/**
* Get the bsh method matching the specified signature declared in this name space or a parent.
*
* <p>Note: this method is primarily intended for use internally. If you use this method outside
* of the bsh package you will have to be familiar with BeanShell's use of the Primitive wrapper
* class.
*
* @see bsh.Primitive
* @return the BshMethod or null if not found
* @param declaredOnly if true then only methods declared directly in this namespace will be found
* and no inherited or imported methods will be visible.
*/
public BshMethod getMethod(String name, Class[] sig, boolean declaredOnly) throws UtilEvalError {
BshMethod method = null;
// Change import precedence if we are a class body/instance
// Get import first.
if (method == null && isClass && !declaredOnly) method = getImportedMethod(name, sig);
if (method == null && methods != null) {
List<BshMethod> list = methods.get(name);
if (list != null) {
// Apply most specific signature matching
Class[][] candidates = new Class[list.size()][];
for (int i = 0; i < candidates.length; i++) candidates[i] = list.get(i).getParameterTypes();
int match = Reflect.findMostSpecificSignature(sig, candidates);
if (match != -1) method = list.get(match);
}
}
if (method == null && !isClass && !declaredOnly) method = getImportedMethod(name, sig);
// try parent
if (!declaredOnly && (method == null) && (parent != null)) return parent.getMethod(name, sig);
return method;
}
String getPackage() {
if (packageName != null) return packageName;
if (parent != null) return parent.getPackage();
return null;
}
/**
* Load a class through this namespace taking into account imports. The class search will proceed
* through the parent namespaces if necessary.
*
* @return null if not found.
*/
public Class getClass(String name) throws UtilEvalError {
Class c = getClassImpl(name);
if (c != null) return c;
else
// implement the recursion for getClassImpl()
if (parent != null) return parent.getClass(name);
else return null;
}
NameSpace copy() {
try {
final NameSpace clone = (NameSpace) clone();
clone.thisReference = null;
clone.variables = clone(variables);
clone.methods = clone(methods);
clone.importedClasses = clone(importedClasses);
clone.importedPackages = clone(importedPackages);
clone.importedCommands = clone(importedCommands);
clone.importedObjects = clone(importedObjects);
clone.importedStatic = clone(importedStatic);
clone.names = clone(names);
return clone;
} catch (CloneNotSupportedException e) {
throw new IllegalStateException(e);
}
}
/**
* Description of the Method
*
* @param namespace Description of the Parameter
* @exception UtilEvalError Description of the Exception
*/
private void resetDefaultVariables(NameSpace namespace)
// throws UtilEvalError {
{
try {
namespace.setVariable("reg", factory, false);
} catch (UtilEvalError ex) {
log.error(ex, ex);
}
} // }}}
public BshClassManager getClassManager() {
if (classManager != null) return classManager;
if (parent != null && parent != JAVACODE) return parent.getClassManager();
System.out.println("experiment: creating class manager");
classManager = BshClassManager.createClassManager(null /*interp*/);
// Interpreter.debug("No class manager namespace:" +this);
return classManager;
}
/** Description of the Method */
public void init() {
global = new NameSpace(new BshClassManager(), "Embedded BeanShell interpreter");
// global.importPackage("org.gjt.sp.util");
global.importPackage("org.twdata.TW1606U.gui");
global.importPackage("org.twdata.TW1606U.signal");
global.importPackage("org.twdata.TW1606U.action");
global.importPackage("org.twdata.TW1606U.tw");
global.importPackage("org.twdata.TW1606U.tw.data");
global.importPackage("org.twdata.TW1606U.data");
global.importPackage("org.twdata.TW1606U.tw.model");
global.importPackage("org.twdata.TW1606U.tw.signal");
global.importPackage("org.werx.framework.bus");
interpForMethods = createInterpreter(global);
} // }}}
/**
* Locate a variable and return the Variable object with optional recursion through parent name
* spaces.
*
* <p>If this namespace is static, return only static variables.
*
* @return the Variable value or null if it is not defined
*/
protected Variable getVariableImpl(String name, boolean recurse) throws UtilEvalError {
Variable var = null;
// Change import precedence if we are a class body/instance
// Get imported first.
if (var == null && isClass) var = getImportedVar(name);
if (var == null && variables != null) var = (Variable) variables.get(name);
// Change import precedence if we are a class body/instance
if (var == null && !isClass) var = getImportedVar(name);
// try parent
if (recurse && (var == null) && (parent != null)) var = parent.getVariableImpl(name, recurse);
return var;
}
/** Helper for implementing NameSource */
protected void getAllNamesAux(List<String> list) {
list.addAll(variables.keySet());
list.addAll(methods.keySet());
if (parent != null) parent.getAllNamesAux(list);
}
static {
JAVACODE.isMethod = true;
}
/**
* Get the top level namespace or this namespace if we are the top. Note: this method should
* probably return type bsh.This to be consistent with getThis();
*/
public This getGlobal(Interpreter declaringInterpreter) {
if (parent != null) return parent.getGlobal(declaringInterpreter);
else return getThis(declaringInterpreter);
}
SimpleNode getNode() {
if (callerInfoNode != null) return callerInfoNode;
if (parent != null) return parent.getNode();
else return null;
}
