/*
* 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 abstract class OgnlExpressionBase extends OgnlElement implements OgnlExpression {
protected OgnlExpressionBase(@NotNull final ASTNode node) {
super(node);
}
@Nullable
protected final OgnlExpression getExpression(final int index) {
final OgnlExpression[] expressions = findChildrenByClass(OgnlExpression.class);
return expressions.length > index ? expressions[index] : null;
}
@Nullable
protected final PsiType getExpressionType(final int index) {
final OgnlExpression expression = getExpression(index);
return expression == null ? null : expression.getType();
}
@Override
public abstract PsiType getType();
@Override
public Object getConstantValue() {
return null;
}
}