content: /*
   * Copyright (C) 2015 Square, Inc.
   *
   * 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.squareup.javapoet;
  
  import static com.squareup.javapoet.Util.checkArgument;
  import static com.squareup.javapoet.Util.checkNotNull;
  import static com.squareup.javapoet.Util.checkState;
  
  import java.io.IOException;
  import java.lang.reflect.Type;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.Set;
  
  import jdkx.lang.model.SourceVersion;
  import jdkx.lang.model.element.Modifier;
  
  /** A generated field declaration. */
  public final class FieldSpec {
    public final TypeName type;
    public final String name;
    public final CodeBlock javadoc;
    public final List<AnnotationSpec> annotations;
    public final Set<Modifier> modifiers;
    public final CodeBlock initializer;
  
    private FieldSpec(Builder builder) {
      this.type = checkNotNull(builder.type, "type == null");
      this.name = checkNotNull(builder.name, "name == null");
      this.javadoc = builder.javadoc.build();
      this.annotations = Util.immutableList(builder.annotations);
      this.modifiers = Util.immutableSet(builder.modifiers);
      this.initializer =
          (builder.initializer == null) ? CodeBlock.builder().build() : builder.initializer;
    }
  
    public static Builder builder(Type type, String name, Modifier... modifiers) {
      return builder(TypeName.get(type), name, modifiers);
    }
  
    public static Builder builder(TypeName type, String name, Modifier... modifiers) {
      checkNotNull(type, "type == null");
      checkArgument(SourceVersion.isName(name), "not a valid name: %s", name);
      return new Builder(type, name).addModifiers(modifiers);
    }
  
    public boolean hasModifier(Modifier modifier) {
      return modifiers.contains(modifier);
    }
  
    @Override
    public int hashCode() {
      return toString().hashCode();
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (o == null) return false;
      if (getClass() != o.getClass()) return false;
      return toString().equals(o.toString());
    }
  
    @Override
    public String toString() {
      StringBuilder out = new StringBuilder();
      try {
        CodeWriter codeWriter = new CodeWriter(out);
        emit(codeWriter, Collections.emptySet());
        return out.toString();
      } catch (IOException e) {
        throw new AssertionError();
      }
    }
  
    void emit(CodeWriter codeWriter, Set<Modifier> implicitModifiers) throws IOException {
      codeWriter.emitJavadoc(javadoc);
      codeWriter.emitAnnotations(annotations, false);
      codeWriter.emitModifiers(modifiers, implicitModifiers);
      codeWriter.emit("$T $L", type, name);
      if (!initializer.isEmpty()) {
        codeWriter.emit(" = ");
        codeWriter.emit(initializer);
      }
      codeWriter.emit(";\n");
    }
  
    public Builder toBuilder() {
      Builder builder = new Builder(type, name);
      builder.javadoc.add(javadoc);
      builder.annotations.addAll(annotations);
      builder.modifiers.addAll(modifiers);
      builder.initializer = initializer.isEmpty() ? null : initializer;
      return builder;
    }
  
    public static final class Builder {
      public final List<AnnotationSpec> annotations = new ArrayList<>();
      public final List<Modifier> modifiers = new ArrayList<>();
      private final TypeName type;
      private final String name;
      private final CodeBlock.Builder javadoc = CodeBlock.builder();
      private CodeBlock initializer = null;
  
      private Builder(TypeName type, String name) {
        this.type = type;
        this.name = name;
      }
  
      public Builder addJavadoc(String format, Object... args) {
        javadoc.add(format, args);
        return this;
      }
  
      public Builder addJavadoc(CodeBlock block) {
        javadoc.add(block);
        return this;
      }
  
      public Builder addAnnotations(Iterable<AnnotationSpec> annotationSpecs) {
        checkArgument(annotationSpecs != null, "annotationSpecs == null");
        for (AnnotationSpec annotationSpec : annotationSpecs) {
          this.annotations.add(annotationSpec);
        }
        return this;
      }
  
      public Builder addAnnotation(AnnotationSpec annotationSpec) {
        this.annotations.add(annotationSpec);
        return this;
      }
  
      public Builder addAnnotation(Class<?> annotation) {
        return addAnnotation(ClassName.get(annotation));
      }
  
      public Builder addAnnotation(ClassName annotation) {
        this.annotations.add(AnnotationSpec.builder(annotation).build());
        return this;
      }
  
      public Builder addModifiers(Modifier... modifiers) {
        Collections.addAll(this.modifiers, modifiers);
        return this;
      }
  
      public Builder initializer(String format, Object... args) {
        return initializer(CodeBlock.of(format, args));
      }
  
      public Builder initializer(CodeBlock codeBlock) {
        checkState(this.initializer == null, "initializer was already set");
        this.initializer = checkNotNull(codeBlock, "codeBlock == null");
        return this;
      }
  
      public FieldSpec build() {
        return new FieldSpec(this);
      }
    }
  }
  