/*
* Copyright 2000-2015 JetBrains s.r.o.
*
* 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;
import com.intellij.psi.PsiElement;
import org.jetbrains.annotations.NotNull;
import java.util.List;
/**
* @see com.intellij.codeInsight.hint.actions.ShowExpressionTypeAction
*
* @author gregsh
*/
public abstract class ExpressionTypeProvider<T extends PsiElement> {
/**
* Returns HTML string for type info hint.
* @see com.intellij.openapi.util.text.StringUtil#escapeXml(String)
*/
@NotNull
public abstract String getInformationHint(@NotNull T element);
/**
* Returns HTML string if no target found at position.
*/
@NotNull
public abstract String getErrorHint();
/**
* Returns the list of all possible targets at specified position.
*/
@NotNull
public abstract List<T> getExpressionsAt(@NotNull PsiElement elementAt);
}