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      1 /*
      2  * Copyright 2016 Google Inc. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.turbine.diag;
     18 
     19 import com.google.common.collect.ImmutableList;
     20 import com.google.turbine.diag.TurbineError.ErrorKind;
     21 import java.util.LinkedHashSet;
     22 import java.util.Set;
     23 
     24 /** A log that collects diagnostics. */
     25 public class TurbineLog {
     26 
     27   private final Set<TurbineDiagnostic> errors = new LinkedHashSet<>();
     28 
     29   public TurbineLogWithSource withSource(SourceFile source) {
     30     return new TurbineLogWithSource(source);
     31   }
     32 
     33   public void maybeThrow() {
     34     if (!errors.isEmpty()) {
     35       throw new TurbineError(ImmutableList.copyOf(errors));
     36     }
     37   }
     38 
     39   /** A log for a specific source file. */
     40   public class TurbineLogWithSource {
     41 
     42     private final SourceFile source;
     43 
     44     private TurbineLogWithSource(SourceFile source) {
     45       this.source = source;
     46     }
     47 
     48     public void error(ErrorKind kind, Object... args) {
     49       errors.add(TurbineDiagnostic.format(source, kind, args));
     50     }
     51 
     52     public void error(int position, ErrorKind kind, Object... args) {
     53       errors.add(TurbineDiagnostic.format(source, position, kind, args));
     54     }
     55   }
     56 }
     57