/*
 * Copyright 2011 The authors
 * 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 com.intellij.lang.ognl.psi;

import com.intellij.lang.ASTNode;
import com.intellij.psi.PsiType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author Yann Cébron
 */
public class OgnlBinaryExpression extends OgnlExpressionBase {

  public OgnlBinaryExpression(@NotNull final ASTNode node) {
    super(node);
  }

  @Nullable
  public OgnlExpression getLeftOperand() {
    return getExpression(0);
  }

  @Nullable
  public OgnlExpression getRightOperand() {
    return getExpression(1);
  }

  @NotNull
  public OgnlTokenType getOperationSign() {
    final ASTNode node = getNode().findChildByType(OgnlTokenTypes.OPERATIONS);
    assert node != null : "unknown operation sign: '" + getText() + "'";
    return (OgnlTokenType) node.getElementType();
  }

  @Override
  public PsiType getType() {
    final OgnlExpression leftOperand = getLeftOperand();
    return leftOperand != null ? leftOperand.getType() : null;
  }

}