/jEdit/tags/jedit-4-0-pre5/bsh/BSHLHSPrimarySuffix.java
Java | 156 lines | 94 code | 19 blank | 43 comment | 9 complexity | 0d7a4130b44fbea1425edb25a93e9820 MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
- /*****************************************************************************
- * *
- * 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 (pat@pat.net) *
- * Author of Learning Java, O'Reilly & Associates *
- * http://www.pat.net/~pat/ *
- * *
- *****************************************************************************/
- /*
- Warning: this is a hack... should be unified with BSHPrimarySuffix
- */
- package bsh;
- import java.util.Hashtable;
- import java.lang.reflect.InvocationTargetException;
- class BSHLHSPrimarySuffix extends SimpleNode
- {
- public static final int
- INDEX = 1,
- NAME = 2,
- PROPERTY = 3;
- public int operation; // field access or index
- Object index; // the index value if any
- /*
- If this is a simple field access field is the field
- If we're hopscotching a method to a field, method is the
- method name and field is the field of the resulting object
- */
- public String field;
- public String method;
- BSHLHSPrimarySuffix(int id) { super(id); }
- public LHS doLHSSuffix(
- Object obj, CallStack callstack, Interpreter interpreter)
- throws EvalError
- {
- try
- {
- switch(operation)
- {
- case INDEX:
- return doIndex(obj, callstack, interpreter);
- case NAME:
- return doName(obj, callstack, interpreter);
- case PROPERTY:
- return doProperty(obj, callstack, interpreter);
- default:
- throw new InterpreterError("LHS suffix");
- }
- }
- catch(ReflectError e)
- {
- throw new EvalError("reflection error: " + e, this);
- }
- catch(InvocationTargetException e)
- {
- throw new TargetError(
- "target exception", e.getTargetException(), this, true);
- }
- }
- private LHS doName(
- Object obj, CallStack callstack, Interpreter interpreter)
- throws EvalError, ReflectError, InvocationTargetException
- {
- if (jjtGetNumChildren() == 0)
- // simple field access
- return Reflect.getLHSObjectField(obj, field);
- else {
- // intermediate method invocation, and field access
- Object[] oa = ((BSHArguments)jjtGetChild(0)).getArguments(
- callstack, interpreter);
- try {
- obj = Reflect.invokeObjectMethod(interpreter, obj, method, oa, this);
- } catch ( EvalError ee ) {
- // catch and re-throw to get line number right
- throw new EvalError( ee.getMessage(), this );
- }
- return Reflect.getLHSObjectField(obj, field);
- }
- }
- private LHS doIndex(
- Object obj, CallStack callstack, Interpreter interpreter)
- throws EvalError, ReflectError
- {
- if(!obj.getClass().isArray())
- throw new EvalError("Not an array", this);
- int index;
- try
- {
- Primitive val = (Primitive)(((SimpleNode)jjtGetChild(0)).eval(
- callstack, interpreter));
- index = val.intValue();
- }
- catch(Exception e)
- {
- throw new EvalError("You can only index arrays by integer types", this);
- }
- return new LHS(obj, index);
- }
- private LHS doProperty(
- Object obj, CallStack callstack, Interpreter interpreter)
- throws EvalError, ReflectError
- {
- if(obj == Primitive.VOID)
- throw new EvalError("Attempt to access property on a void type", this);
- else if(obj instanceof Primitive)
- throw new EvalError("Attempt to access property on a primitive", this);
- Object value = ((SimpleNode)jjtGetChild(0)).eval(
- callstack, interpreter);
- if(!(value instanceof String))
- throw new EvalError("Property expression must be a String or identifier.", this);
- Interpreter.debug("LHS property access: ");
- return new LHS(obj, (String)value);
- }
- }