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package bsh;
import java.lang.reflect.Array;
class BSHArrayInitializer extends SimpleNode {
BSHArrayInitializer(int id) {
super(id);
}
public Object eval(CallStack callstack, Interpreter interpreter) throws EvalError {
throw new EvalError("Array initializer has no base type.", this, callstack);
}
/**
* Construct the array from the initializer syntax.
*
* @param baseType
* the base class type of the array (no dimensionality)
* @param dimensions
* the top number of dimensions of the array e.g. 2 for a
* String [][];
*/
public Object eval(Class baseType, int dimensions, CallStack callstack, Interpreter interpreter) throws EvalError {
int numInitializers = jjtGetNumChildren();
// allocate the array to store the initializers
int[] dima = new int[dimensions]; // description of the
// array
// The other dimensions default to zero and are assigned when
// the values are set.
dima[0] = numInitializers;
Object initializers = Array.newInstance(baseType, dima);
// Evaluate the initializers
for (int i = 0; i < numInitializers; i++) {
SimpleNode node = (SimpleNode) jjtGetChild(i);
Object currentInitializer;
if (node instanceof BSHArrayInitializer) {
if (dimensions < 2)
throw new EvalError("Invalid Location for Intializer, position: " + i, this, callstack);
currentInitializer = ((BSHArrayInitializer) node).eval(baseType, dimensions - 1, callstack, interpreter);
} else
currentInitializer = node.eval(callstack, interpreter);
if (currentInitializer == Primitive.VOID)
throw new EvalError("Void in array initializer, position" + i, this, callstack);
// Determine if any conversion is necessary on the
// initializers.
//
// Quick test to see if conversions apply:
// If the dimensionality of the array is 1 then the
// elements of
// the initializer can be primitives or boxable types.
// If it is
// greater then the values must be array (object) types
// and there
// are currently no conversions that we do on those.
// If we have conversions on those in the future then we
// need to
// get the real base type here instead of the
// dimensionless one.
Object value = currentInitializer;
if (dimensions == 1) {
// We do a bsh cast here. strictJava should be
// able to affect
// the cast there when we tighten control
try {
value = Types.castObject(currentInitializer, baseType, Types.CAST);
} catch (UtilEvalError e) {
throw e.toEvalError("Error in array initializer", this, callstack);
}
// unwrap any primitive, map voids to null, etc.
value = Primitive.unwrap(value);
}
// store the value in the array
try {
Array.set(initializers, i, value);
} catch (IllegalArgumentException e) {
Interpreter.debug("illegal arg" + e);
throwTypeError(baseType, currentInitializer, i, callstack);
} catch (ArrayStoreException e) { // I think this
// can happen
Interpreter.debug("arraystore" + e);
throwTypeError(baseType, currentInitializer, i, callstack);
}
}
return initializers;
}
private void throwTypeError(Class baseType, Object initializer, int argNum, CallStack callstack) throws EvalError {
String rhsType;
if (initializer instanceof Primitive)
rhsType = ((Primitive) initializer).getType().getName();
else
rhsType = Reflect.normalizeClassName(initializer.getClass());
throw new EvalError("Incompatible type: " + rhsType + " in initializer of array type: " + baseType + " at position: " + argNum, this, callstack);
}
}
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