proguard.evaluation.util.jsonprinter.StateTracker Maven / Gradle / Ivy

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ProGuardCORE is a free library to read, analyze, modify, and write Java class files.

There is a newer version: 9.1.6

/*
 * ProGuardCORE -- library to process Java bytecode.
 *
 * Copyright (c) 2002-2023 Guardsquare NV
 *
 * 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 proguard.evaluation.util.jsonprinter;

import java.util.ArrayList;
import java.util.List;

/** Track the state of a partial evaluator instance. */
class StateTracker {
  private final List codeAttributes = new ArrayList<>();

  public CodeAttributeRecord getLastCodeAttribute() {
    if (codeAttributes.isEmpty()) {
      return null;
    }
    return codeAttributes.get(codeAttributes.size() - 1);
  }

  public List getCodeAttributes() {
    return codeAttributes;
  }

  public String toJson() {
    StringBuilder builder = new StringBuilder();
    builder.append("{");
    return JsonPrinter.listToJson("codeAttributes", codeAttributes, builder).append("}").toString();
  }
}