core-it-suite/src/test/resources/mng-7836-alternative-pom-syntax/maven-hocon-extension/src/mdo/hocon-reader.vm

#*
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you 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.
*#
#set ( $package = "org.apache.maven.hocon" )
#set ( $className = "HoconReader" )
#
#set ( $root = $model.getClass( $model.getRoot($version), $version ) )
#set ( $rootXml = $Helper.xmlClassMetadata( $root ) )
#set ( $rootTag = $rootXml.tagName )
#set ( $rootUcapName = $Helper.capitalise( $root.name ) )
#set ( $rootLcapName = $Helper.uncapitalise( $root.name ) )
#
#MODELLO-VELOCITY#SAVE-OUTPUT-TO ${package.replace('.','/')}/${className}.java
// =================== DO NOT EDIT THIS FILE ====================
//  Generated by Modello Velocity from ${template}
//  template, any modifications will be overwritten.
// ==============================================================
package ${package};

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
import org.apache.maven.api.annotations.Generated;
#foreach ( $class in $model.allClasses )
import ${packageModelV4}.${class.name};
#end
import com.typesafe.config.ConfigList;
import com.typesafe.config.ConfigObject;
import com.typesafe.config.ConfigValue;
import com.typesafe.config.ConfigValueType;

@Generated
public class ${className} {

#foreach ( $class in $model.allClasses )
 #if ( $class.name != "InputSource" && $class.name != "InputLocation" )
  #set ( $classUcapName = $Helper.capitalise( $class.name ) )
  #set ( $classLcapName = $Helper.uncapitalise( $class.name ) )
  #set ( $ancestors = $Helper.ancestors( $class ) )
  #set ( $allFields = [] )
  #foreach ( $cl in $ancestors )
    #set ( $dummy = $allFields.addAll( $cl.getFields($version) ) )
  #end
    public ${classUcapName} parse${classUcapName}(ConfigValue value) {
        if (value instanceof ConfigObject) {
            ${classUcapName}.Builder ${classLcapName} = ${classUcapName}.newBuilder(true);
            ((ConfigObject) value).forEach((k, v) -> {
                switch (k) {
  #foreach ( $field in $allFields )
    #if ( ! $Helper.xmlFieldMetadata( $field ).transient && $field.name != "root" )
      #set ( $fieldTagName = $Helper.xmlFieldMetadata( $field ).tagName )
      #if ( ! $fieldTagName )
        #set ( $fieldTagName = $field.name )
      #end
      #if ( $Helper.isFlatItems( $field ) )
        #set ( $fieldTagName = $Helper.singular( $fieldTagName ) )
      #end
      #set ( $fieldCapName = $Helper.capitalise( $field.name ) )
                    case "${fieldTagName}": {
      #if ( $field.type == "String" )
                        ${classLcapName}.${field.name}(getStringValue(v));
                        break;
      #elseif ( $field.type == "boolean" || $field.type == "Boolean" )
                        ${classLcapName}.${field.name}(getBooleanValue(v));
                        break;
      #elseif ( $field.type == "int" )
                        ${classLcapName}.${field.name}(getIntegerValue(v));
                        break;
      #elseif ( $field.type == "DOM" )
//                        ${classLcapName}.${field.name}(XmlNodeBuilder.build(parser, true));
                        break;
      #elseif ( $field.type == "java.util.List" && $field.to == "String" && $field.multiplicity == "*" )
                        ${classLcapName}.${field.name}(getStringList(v));
                        break;
      #elseif ( $field.type == "java.util.Properties" && $field.to == "String" && $field.multiplicity == "*" )
                        ${classLcapName}.${field.name}(getStringMap(v));
                        break;
      #elseif ( $field.to && $field.multiplicity == "1" )
                        ${classLcapName}.${field.name}(parse${field.toClass.name}(v));
                        break;
      #elseif ( $field.to && $field.multiplicity == "*" && $Helper.isFlatItems( $field ) )
                        ${field.name}.add(parse${field.toClass.name}(v));
                        break;
      #elseif ( $field.to && $field.multiplicity == "*" )
                        ${classLcapName}.${field.name}(getList(v, this::parse${field.toClass.name}));
                        break;
      #else
                        // TODO: type=${field.type} to=${field.to} multiplicity=${field.multiplicity}
                        break;
      #end
                    }
    #end
  #end
                    default: {
                        checkUnknownElement(k, v);
                        break;
                    }
                }
            });
  #foreach ( $field in $allFields )
    #if ( $Helper.isFlatItems( $field ) )
            ${classLcapName}.${field.name}(${field.name});
    #end
  #end
            return ${classLcapName}.build();
  #if($class.name=="Dependency")
        } else if (value != null && value.valueType() == ConfigValueType.STRING) {
            Dependency.Builder dependency = Dependency.newBuilder(true);
            String[] tokens = ((String) value.unwrapped()).split(":");
            if (tokens.length < 3 || tokens.length > 5) {
                throw new RuntimeException("Invalid artifact, you must specify "
                        + "groupId:artifactId:version[:packaging[:classifier]] " + value);
            }
            dependency.groupId(tokens[0]);
            dependency.artifactId(tokens[1]);
            dependency.version(tokens[2]);
            if (tokens.length >= 4) {
                dependency.type(tokens[3]);
            }
            if (tokens.length == 5) {
                dependency.classifier(tokens[4]);
            }
            return dependency.build();
    #end
        } else if (value != null) {
            throw new IllegalArgumentException("Invalid syntax: cannot parse: " + value);
        }
        return null;
    }

 #end
#end

    protected String getStringValue(ConfigValue v) {
        return v.unwrapped().toString();
    }

    protected List<String> getStringList(ConfigValue v) {
        if (v instanceof ConfigList) {
            return ((ConfigList) v).unwrapped().stream().map(Object::toString)
                .collect(Collectors.toList());
        }
        throw new IllegalArgumentException("Unable to convert to List<String>: '" + v + "'");
    }

    protected boolean getBooleanValue(ConfigValue v) {
        return Boolean.parseBoolean(v.unwrapped().toString());
    }

    protected ConfigList getList(ConfigValue v) {
        if (v instanceof ConfigList) {
            return (ConfigList) v;
        }
        throw new IllegalArgumentException("Unable to convert to List<?>: '" + v + "'");
    }

    protected <T> List<T> getList(ConfigValue v, Function<ConfigValue, T> parser) {
        return getList(v).stream().map(parser).collect(Collectors.toList());
    }

    protected Map<String, String> getStringMap(ConfigValue v) {
        if (v instanceof ConfigObject) {
            return ((ConfigObject) v).entrySet().stream().collect(Collectors.toMap(
                e -> e.getKey(),
                e -> getStringValue(e.getValue())
            ));
        }
        throw new IllegalArgumentException("Unable to convert to Map<String, String>: '" + v + "'");
    }

    protected void checkUnknownElement(String k, Object v) {
        throw new IllegalArgumentException("Unrecognized element '" + k + "' with value '" + v + "'");
    }

}