001/* 002 * Copyright (C) 2022 - 2024, the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package io.github.ascopes.jct.repr; 017 018import static java.util.stream.Collectors.joining; 019 020import io.github.ascopes.jct.diagnostics.TraceDiagnostic; 021import java.util.Collection; 022import javax.tools.JavaFileObject; 023import org.apiguardian.api.API; 024import org.apiguardian.api.API.Status; 025import org.assertj.core.presentation.Representation; 026import org.jspecify.annotations.Nullable; 027 028/** 029 * Representation of a collection of diagnostics. 030 * 031 * @author Ashley Scopes 032 * @since 0.0.1 033 */ 034@API(since = "0.0.1", status = Status.STABLE) 035public final class TraceDiagnosticListRepresentation implements Representation { 036 037 private static final TraceDiagnosticListRepresentation INSTANCE 038 = new TraceDiagnosticListRepresentation(); 039 040 /** 041 * Get an instance of this diagnostic collection representation. 042 * 043 * @return the instance. 044 */ 045 public static TraceDiagnosticListRepresentation getInstance() { 046 return INSTANCE; 047 } 048 049 private TraceDiagnosticListRepresentation() { 050 // Nothing to see here, move along now. 051 } 052 053 @Override 054 public String toStringOf(@Nullable Object object) { 055 if (object == null) { 056 return "null"; 057 } 058 059 @SuppressWarnings("unchecked") 060 var diagnostics = (Collection<? extends TraceDiagnostic<? extends JavaFileObject>>) object; 061 062 return "\n" + diagnostics 063 .stream() 064 .map(TraceDiagnosticRepresentation.getInstance()::toStringOf) 065 .map(this::indentAndBullet) 066 .collect(joining("\n\n")); 067 } 068 069 private String indentAndBullet(String repr) { 070 return " - " + repr.lines().collect(joining("\n ")); 071 } 072}