/*****************************************************************************
* *
* This file is part of the BeanShell Java Scripting distribution. *
* Documentation and updates may be found at http://www.beanshell.org/ *
* *
* Sun Public License Notice: *
* *
* The contents of this file are subject to the Sun Public License Version *
* 1.0 (the "License"); you may not use this file except in compliance with *
* the License. A copy of the License is available at http://www.sun.com *
* *
* The Original Code is BeanShell. The Initial Developer of the Original *
* Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
* (C) 2000. All Rights Reserved. *
* *
* GNU Public License Notice: *
* *
* Alternatively, the contents of this file may be used under the terms of *
* the GNU Lesser General Public License (the "LGPL"), in which case the *
* provisions of LGPL are applicable instead of those above. If you wish to *
* allow use of your version of this file only under the terms of the LGPL *
* and not to allow others to use your version of this file under the SPL, *
* indicate your decision by deleting the provisions above and replace *
* them with the notice and other provisions required by the LGPL. If you *
* do not delete the provisions above, a recipient may use your version of *
* this file under either the SPL or the LGPL. *
* *
* Patrick Niemeyer ([email protected]) *
* Author of Learning Java, O'Reilly & Associates *
* http://www.pat.net/~pat/ *
* *
*****************************************************************************/
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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