pl.jalokim.propertiestojson.util.PropertiesToJsonConverterBuilder Maven / Gradle / Ivy
package pl.jalokim.propertiestojson.util;
import static pl.jalokim.propertiestojson.resolvers.primitives.object.NullToJsonTypeConverter.NULL_TO_JSON_RESOLVER;
import static pl.jalokim.propertiestojson.resolvers.primitives.string.TextToEmptyStringResolver.EMPTY_TEXT_RESOLVER;
import static pl.jalokim.propertiestojson.resolvers.primitives.string.TextToJsonNullReferenceResolver.TEXT_TO_NULL_JSON_RESOLVER;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import pl.jalokim.propertiestojson.object.AbstractJsonType;
import pl.jalokim.propertiestojson.resolvers.primitives.object.BooleanToJsonTypeConverter;
import pl.jalokim.propertiestojson.resolvers.primitives.object.CharacterToJsonTypeConverter;
import pl.jalokim.propertiestojson.resolvers.primitives.object.ElementsToJsonTypeConverter;
import pl.jalokim.propertiestojson.resolvers.primitives.object.NullToJsonTypeConverter;
import pl.jalokim.propertiestojson.resolvers.primitives.object.NumberToJsonTypeConverter;
import pl.jalokim.propertiestojson.resolvers.primitives.object.ObjectToJsonTypeConverter;
import pl.jalokim.propertiestojson.resolvers.primitives.object.SuperObjectToJsonTypeConverter;
import pl.jalokim.propertiestojson.resolvers.primitives.string.TextToBooleanResolver;
import pl.jalokim.propertiestojson.resolvers.primitives.string.TextToCharacterResolver;
import pl.jalokim.propertiestojson.resolvers.primitives.string.TextToConcreteObjectResolver;
import pl.jalokim.propertiestojson.resolvers.primitives.string.TextToElementsResolver;
import pl.jalokim.propertiestojson.resolvers.primitives.string.TextToEmptyStringResolver;
import pl.jalokim.propertiestojson.resolvers.primitives.string.TextToJsonNullReferenceResolver;
import pl.jalokim.propertiestojson.resolvers.primitives.string.TextToNumberResolver;
import pl.jalokim.propertiestojson.resolvers.primitives.string.TextToObjectResolver;
/**
* Builder class for PropertiesToJsonConverter
*/
public class PropertiesToJsonConverterBuilder {
static final List> TO_OBJECT_RESOLVERS = defaultResolvers();
static final List> TO_JSON_TYPE_CONVERTERS = defaultConverters();
private final List> resolvers = new ArrayList<>();
private final List> converters = new ArrayList<>();
private NullToJsonTypeConverter nullToJsonConverter = NULL_TO_JSON_RESOLVER;
private TextToJsonNullReferenceResolver textToJsonNullResolver = TEXT_TO_NULL_JSON_RESOLVER;
private TextToEmptyStringResolver textToEmptyStringResolver = EMPTY_TEXT_RESOLVER;
private Charset charset;
private boolean skipNulls = false;
private boolean onlyCustomConverters = false;
private boolean onlyCustomResolvers = false;
/**
* Default list of resolvers from text to java Object... Order here is important.
*
* @return list
*/
static List> defaultResolvers() {
List> toObjectResolvers = new ArrayList<>();
toObjectResolvers.add(new TextToElementsResolver());
toObjectResolvers.add(new TextToObjectResolver());
toObjectResolvers.add(new TextToNumberResolver());
toObjectResolvers.add(new TextToCharacterResolver());
toObjectResolvers.add(new TextToBooleanResolver());
return Collections.unmodifiableList(toObjectResolvers);
}
/**
* Default list of converters from java Object to some instance of {@link AbstractJsonType}
*
* @return list
*/
static List> defaultConverters() {
List> toJsonTypeConverters = new ArrayList<>();
toJsonTypeConverters.add(new ElementsToJsonTypeConverter());
toJsonTypeConverters.add(new SuperObjectToJsonTypeConverter());
toJsonTypeConverters.add(new NumberToJsonTypeConverter());
toJsonTypeConverters.add(new CharacterToJsonTypeConverter());
toJsonTypeConverters.add(new BooleanToJsonTypeConverter());
return Collections.unmodifiableList(toJsonTypeConverters);
}
/**
* Returns new instance of builder.
*
* @return builder instance
*/
public static PropertiesToJsonConverterBuilder builder() {
return new PropertiesToJsonConverterBuilder();
}
/**
* Will build PropertiesToJsonConverter only with instances provided in argument. Order of resolvers has meaning. Order is crucial.
*
* @param resolvers it override default list of {@link PropertiesToJsonConverterBuilder#TO_OBJECT_RESOLVERS}
* @return builder instance
*/
public PropertiesToJsonConverterBuilder onlyCustomTextToObjectResolvers(TextToConcreteObjectResolver... resolvers) {
onlyCustomResolvers = true;
this.resolvers.addAll(Arrays.asList(resolvers));
return this;
}
/**
* Will build PropertiesToJsonConverter with combined list of {@link PropertiesToJsonConverterBuilder#TO_OBJECT_RESOLVERS} and instances provided in
* argument.
*
* @param resolvers added to {@link PropertiesToJsonConverterBuilder#TO_OBJECT_RESOLVERS}
* @return builder instance
*/
public PropertiesToJsonConverterBuilder defaultAndCustomTextToObjectResolvers(TextToConcreteObjectResolver... resolvers) {
onlyCustomResolvers = false;
this.resolvers.addAll(Arrays.asList(resolvers));
return this;
}
/**
* Will build PropertiesToJsonConverter only with instances provided in argument. Order of converters has meaning only when converters can convert from the
* same java class.
*
* @param converters it override default list of {@link PropertiesToJsonConverterBuilder#TO_JSON_TYPE_CONVERTERS}
* @return builder instance
*/
public PropertiesToJsonConverterBuilder onlyCustomObjectToJsonTypeConverters(ObjectToJsonTypeConverter... converters) {
onlyCustomConverters = true;
this.converters.addAll(Arrays.asList(converters));
return this;
}
/**
* Will build PropertiesToJsonConverter with combined list of {@link PropertiesToJsonConverterBuilder#TO_JSON_TYPE_CONVERTERS} and instances provided in
* argument.
*
* @param converters added to {@link PropertiesToJsonConverterBuilder#TO_JSON_TYPE_CONVERTERS}
* @return builder instance
*/
public PropertiesToJsonConverterBuilder defaultAndCustomObjectToJsonTypeConverters(ObjectToJsonTypeConverter... converters) {
onlyCustomConverters = false;
this.converters.addAll(Arrays.asList(converters));
return this;
}
/**
* It override default conversion of json null reference for something what you need. (return of this instance will be simply concated to json)
*
* @param nullToJsonConverter new implementation of NullToJsonTypeConverter
* @return builder instance
*/
public PropertiesToJsonConverterBuilder overrideNullToJsonConverter(NullToJsonTypeConverter nullToJsonConverter) {
this.nullToJsonConverter = nullToJsonConverter;
return this;
}
/**
* It override default behavior for resolving of text "null" or java.lang.String with null reference.
*
* @param textToJsonNullResolver new implementation of TextToJsonNullReferenceResolver
* @return builder instance
*/
public PropertiesToJsonConverterBuilder overrideTextToJsonNullResolver(TextToJsonNullReferenceResolver textToJsonNullResolver) {
this.textToJsonNullResolver = textToJsonNullResolver;
return this;
}
/**
* It override default behavior for resolving of empty text in java.lang.String.
*
* @param textToEmptyStringResolver new implementation of TextToEmptyStringResolver
* @return builder instance
*/
public PropertiesToJsonConverterBuilder overrideTextToEmptyStringResolver(TextToEmptyStringResolver textToEmptyStringResolver) {
this.textToEmptyStringResolver = textToEmptyStringResolver;
return this;
}
/**
* It will set the charset of the reader.
*
* @param charset charset to use
* @return builder instance
*/
public PropertiesToJsonConverterBuilder charset(Charset charset) {
this.charset = charset;
return this;
}
/**
* It will skip every leaf in json object which is null, not skip null in arrays.
*
* @return PropertiesToJsonConverterBuilder instance
*/
public PropertiesToJsonConverterBuilder skipNulls() {
skipNulls = true;
return this;
}
/**
* It creates new converter instance.
*
* @return instance of PropertiesToJsonConverter
*/
public PropertiesToJsonConverter build() {
List> resultConverters = new ArrayList<>();
if (onlyCustomConverters) {
resultConverters.addAll(converters);
} else {
resultConverters.addAll(converters);
resultConverters.addAll(TO_JSON_TYPE_CONVERTERS);
}
List> resultResolvers = new ArrayList<>();
if (onlyCustomResolvers) {
resultResolvers.addAll(resolvers);
} else {
resultResolvers.addAll(resolvers);
resultResolvers.addAll(TO_OBJECT_RESOLVERS);
}
return new PropertiesToJsonConverter(resultResolvers,
resultConverters,
nullToJsonConverter,
textToJsonNullResolver,
textToEmptyStringResolver,
skipNulls,
charset);
}
}