org.mvel2.ast.OperativeAssign Maven / Gradle / Ivy

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/**
 * 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 static org.mvel2.MVEL.eval;
import static org.mvel2.util.ParseTools.subCompileExpression;

import org.mvel2.ParserContext;
import org.mvel2.compiler.ExecutableStatement;
import org.mvel2.integration.VariableResolver;
import org.mvel2.integration.VariableResolverFactory;
import org.mvel2.math.MathProcessor;
import org.mvel2.util.ParseTools;

public class OperativeAssign extends ASTNode {

    private final int operation;
    private String varName;
    private ExecutableStatement statement;
    private int knownInType = -1;

    public OperativeAssign(String variableName, char[] expr, int start, int offset, int operation, int fields, ParserContext pCtx) {
        super(pCtx);
        this.varName = variableName;
        this.operation = operation;
        this.expr = expr;
        this.start = start;
        this.offset = offset;

        if ((fields & COMPILE_IMMEDIATE) != 0) {
            egressType = (statement = (ExecutableStatement) subCompileExpression(expr, start, offset, pCtx)).getKnownEgressType();

            if (pCtx.isStrongTyping()) {
                knownInType = ParseTools.__resolveType(egressType);
            }

            if (!pCtx.hasVarOrInput(varName)) {
                pCtx.addInput(varName, egressType);
            }
        }
    }

    public Object getReducedValueAccelerated(Object ctx, Object thisValue, VariableResolverFactory factory) {
        VariableResolver resolver = factory.getVariableResolver(varName);
        resolver.setValue(
                ctx = MathProcessor.doOperations(resolver.getValue(), operation, knownInType, statement.getValue(ctx, thisValue, factory)));
        return ctx;
    }

    public Object getReducedValue(Object ctx, Object thisValue, VariableResolverFactory factory) {
        VariableResolver resolver = factory.getVariableResolver(varName);
        resolver.setValue(ctx = MathProcessor.doOperations(resolver.getValue(), operation, eval(expr, start, offset, ctx, factory)));
        return ctx;
    }
}