RegExpFactory.java

/*
 * Copyright 2000-2017 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 org.intellij.lang.regexp.inspection;

import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiFileFactory;
import com.intellij.psi.util.PsiTreeUtil;
import org.intellij.lang.regexp.RegExpFileType;
import org.intellij.lang.regexp.psi.RegExpBranch;
import org.intellij.lang.regexp.psi.RegExpPattern;
import org.jetbrains.annotations.NotNull;

/**
 * @author Bas Leijdekkers
 */
public class RegExpFactory {

  private RegExpFactory() {}

  @NotNull
  public static RegExpPattern createPatternFromText(@NotNull CharSequence text, @NotNull PsiElement context) {
    final PsiFileFactory factory = PsiFileFactory.getInstance(context.getProject());
    final PsiFile file = factory.createFileFromText("dummy.regexp", RegExpFileType.INSTANCE, text);
    final RegExpPattern pattern = PsiTreeUtil.getChildOfType(file, RegExpPattern.class);
    assert pattern != null;
    return pattern;
  }

  @NotNull
  public static RegExpBranch createBranchFromText(@NotNull CharSequence text, @NotNull PsiElement context) {
    final RegExpPattern pattern = createPatternFromText(text, context);
    final RegExpBranch branch = PsiTreeUtil.getChildOfType(pattern, RegExpBranch.class);
    assert branch != null;
    return branch;
  }
}