com.contentful.vault.compiler.FieldsInjection.java Source code

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Here is the source code for com.contentful.vault.compiler.FieldsInjection.java

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/*
 * Copyright (C) 2015 Contentful GmbH
 *
 * 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.contentful.vault.compiler;

import com.contentful.vault.BaseFields;
import com.contentful.vault.FieldMeta;
import com.google.common.base.CaseFormat;
import com.squareup.javapoet.ClassName;
import com.squareup.javapoet.FieldSpec;
import com.squareup.javapoet.TypeSpec;
import java.util.Set;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.TypeElement;

final class FieldsInjection extends Injection {
    private final Set<FieldMeta> fields;

    public FieldsInjection(String remoteId, ClassName className, TypeElement originatingElement,
            Set<FieldMeta> fields) {
        super(remoteId, className, originatingElement);
        this.fields = fields;
    }

    @Override
    TypeSpec.Builder getTypeSpecBuilder() {
        TypeSpec.Builder builder = TypeSpec.classBuilder(className.simpleName())
                .addModifiers(Modifier.PUBLIC, Modifier.FINAL).superclass(BaseFields.class);

        for (FieldMeta field : fields) {
            builder.addField(createFieldSpec(field));
        }

        return builder;
    }

    private FieldSpec createFieldSpec(FieldMeta field) {
        String name = CaseFormat.LOWER_CAMEL.converterTo(CaseFormat.UPPER_UNDERSCORE).convert(field.name());
        if (name == null) {
            throw new IllegalArgumentException("Invalid field with ID '" + field.id() + "' for generated class '"
                    + className.simpleName() + "', has no name.");
        }
        return FieldSpec.builder(String.class, name, Modifier.PUBLIC, Modifier.STATIC, Modifier.FINAL)
                .initializer("$S", field.name()).build();
    }
}