platform/lang-api/src/com/intellij/codeInsight/completion/CompletionResult.java

/*
 * Copyright 2000-2011 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.codeInsight.completion;

import com.intellij.codeInsight.lookup.LookupElement;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author peter
 */
public class CompletionResult {
  private final LookupElement myLookupElement;
  private final PrefixMatcher myMatcher;
  private final CompletionSorter mySorter;

  private CompletionResult(LookupElement lookupElement, PrefixMatcher matcher, CompletionSorter sorter) {
    myLookupElement = lookupElement;
    myMatcher = matcher;
    mySorter = sorter;
  }

  @Nullable
  public static CompletionResult wrap(LookupElement lookupElement, PrefixMatcher matcher, CompletionSorter sorter) {
    if (matcher.prefixMatches(lookupElement)) {
      return new CompletionResult(lookupElement, matcher, sorter);
    }
    return null;
  }

  public PrefixMatcher getPrefixMatcher() {
    return myMatcher;
  }

  public CompletionSorter getSorter() {
    return mySorter;
  }

  public LookupElement getLookupElement() {
    return myLookupElement;
  }

  @NotNull
  public CompletionResult withLookupElement(@NotNull LookupElement element) {
    if (!myMatcher.prefixMatches(element)) {
      throw new AssertionError("The new element doesn't match the prefix");
    }
    return new CompletionResult(element, myMatcher, mySorter);
  }

  public boolean isStartMatch() {
    return myMatcher.isStartMatch(myLookupElement);
  }

}