io.sundr.codegen.directives.FieldDirective Maven / Gradle / Ivy

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/*
 * Copyright 2015 The original authors.
 *
 *    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 io.sundr.codegen.directives;

import io.sundr.codegen.Constants;
import io.sundr.codegen.model.Attributeable;
import io.sundr.codegen.model.Property;
import org.apache.velocity.context.InternalContextAdapter;
import org.apache.velocity.runtime.directive.Directive;
import org.apache.velocity.runtime.parser.node.Node;

import java.io.IOException;
import java.io.Writer;

import static io.sundr.codegen.model.Attributeable.INIT;
public class FieldDirective extends Directive {

    @Override
    public String getName() {
        return "field";
    }

    @Override
    public int getType() {
        return LINE;
    }

    @Override
    public boolean render(InternalContextAdapter context, Writer writer, Node node) throws IOException {
        String block = "";
        Property field = null;
        //reading params
        if (node.jjtGetChild(0) != null) {
            field = (Property) node.jjtGetChild(0).value(context);
        }
        writeField(writer, field, block);
        return true;
    }

    private void writeField(Writer writer, Property field, String block) throws IOException {
        if (field != null) {
            writer.append(field.toString());

            if (field.getAttribute(INIT) != null) {
                writer.append(" = ").append(getDefaultValue(field));
            }
        }
        writer.append(";");
    }

    private String getDefaultValue(Property field) {
        Object value = field.getAttribute(INIT);

        if (Constants.STRING_REF.equals(field.getTypeRef()) && !String.valueOf(value).startsWith("\"") ) {
            return "\"" + value + "\"";
        } else {
            return String.valueOf(value);
        }
    }

}