/**
* MVEL 2.0
* Copyright (C) 2007 The Codehaus
* Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.mvel2.ast;
import org.mvel2.CompileException;
import org.mvel2.MVEL;
import org.mvel2.ParserContext;
import org.mvel2.compiler.ExecutableStatement;
import org.mvel2.integration.VariableResolverFactory;
import org.mvel2.util.ParseTools;
import static org.mvel2.util.ParseTools.subCompileExpression;
public class Negation extends ASTNode {
private ExecutableStatement stmt;
public Negation(char[] expr, int start, int offset, int fields, ParserContext pCtx) {
super(pCtx);
this.expr = expr;
this.start = start;
this.offset = offset;
if ((fields & COMPILE_IMMEDIATE) != 0) {
if (((this.stmt = (ExecutableStatement) subCompileExpression(expr, start, offset, pCtx)).getKnownEgressType() != null)
&& (!ParseTools.boxPrimitive(stmt.getKnownEgressType()).isAssignableFrom(Boolean.class))) {
throw new CompileException("negation operator cannot be applied to non-boolean type", expr, start);
}
}
}
public Object getReducedValueAccelerated(Object ctx, Object thisValue, VariableResolverFactory factory) {
return !((Boolean) stmt.getValue(ctx, thisValue, factory));
}
public Object getReducedValue(Object ctx, Object thisValue, VariableResolverFactory factory) {
try {
return !((Boolean) MVEL.eval(expr, start, offset, ctx, factory));
}
catch (NullPointerException e) {
throw new CompileException("negation operator applied to a null value", expr, start, e);
}
catch (ClassCastException e) {
throw new CompileException("negation operator applied to non-boolean expression", expr, start, e);
}
}
public Class getEgressType() {
return Boolean.class;
}
public ExecutableStatement getStatement() {
return stmt;
}
}