com.groupbyinc.common.jackson.annotation.JsonAutoDetect Maven / Gradle / Ivy
package com.fasterxml.jackson.annotation;
import java.lang.annotation.*;
import java.lang.reflect.Member;
import java.lang.reflect.Modifier;
/**
* Class annotation that can be used to define which kinds of Methods
* are to be detected by auto-detection, and with what minimum access level.
* Auto-detection means using name conventions
* and/or signature templates to find methods to use for data binding.
* For example, so-called "getters" can be auto-detected by looking for
* public member methods that return a value, do not take argument,
* and have prefix "get" in their name.
*
* Default setting for all accessors is {@link Visibility#DEFAULT}, which
* in turn means that the global defaults are used. Defaults
* are different for different accessor types (getters need to be public;
* setters can have any access modifier, for example).
* If you assign different {@link Visibility} type then it will override
* global defaults: for example, to require that all setters must be public,
* you would use:
*
* @JsonAutoDetect(setterVisibility=Visibility.PUBLIC_ONLY)
*
*/
@Target({ElementType.ANNOTATION_TYPE, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@JacksonAnnotation
public @interface JsonAutoDetect
{
/**
* Enumeration for possible visibility thresholds (minimum visibility)
* that can be used to limit which methods (and fields) are
* auto-detected.
*/
public enum Visibility {
/**
* Value that means that all kinds of access modifiers are acceptable,
* from private to public.
*/
ANY,
/**
* Value that means that any other access modifier other than 'private'
* is considered auto-detectable.
*/
NON_PRIVATE,
/**
* Value that means access modifiers 'protected' and 'public' are
* auto-detectable (and 'private' and "package access" == no modifiers
* are not)
*/
PROTECTED_AND_PUBLIC,
/**
* Value to indicate that only 'public' access modifier is considered
* auto-detectable.
*/
PUBLIC_ONLY,
/**
* Value that indicates that no access modifiers are auto-detectable:
* this can be used to explicitly disable auto-detection for specified
* types.
*/
NONE,
/**
* Value that indicates that default visibility level (whatever it is,
* depends on context) is to be used. This usually means that inherited
* value (from parent visibility settings) is to be used.
*/
DEFAULT;
public boolean isVisible(Member m) {
switch (this) {
case ANY:
return true;
case NONE:
return false;
case NON_PRIVATE:
return !Modifier.isPrivate(m.getModifiers());
case PROTECTED_AND_PUBLIC:
if (Modifier.isProtected(m.getModifiers())) {
return true;
}
// fall through to public case:
case PUBLIC_ONLY:
return Modifier.isPublic(m.getModifiers());
default:
return false;
}
}
}
/**
* Minimum visibility required for auto-detecting regular getter methods.
*/
Visibility getterVisibility() default Visibility.DEFAULT;
/**
* Minimum visibility required for auto-detecting is-getter methods.
*/
Visibility isGetterVisibility() default Visibility.DEFAULT;
/**
* Minimum visibility required for auto-detecting setter methods.
*/
Visibility setterVisibility() default Visibility.DEFAULT;
/**
* Minimum visibility required for auto-detecting Creator methods,
* except for no-argument constructors (which are always detected
* no matter what).
*/
Visibility creatorVisibility() default Visibility.DEFAULT;
/**
* Minimum visibility required for auto-detecting member fields.
*/
Visibility fieldVisibility() default Visibility.DEFAULT;
/*
/**********************************************************
/* Value class used to enclose information, allow for
/* merging of layered configuration settings.
/**********************************************************
*/
/**
* Helper class used to contain information from a single {@link JsonIgnoreProperties}
* annotation, as well as to provide possible overrides from non-annotation sources.
*
* @since 2.9
*/
public static class Value
implements JacksonAnnotationValue,
java.io.Serializable
{
private static final long serialVersionUID = 1L;
private final static Visibility DEFAULT_FIELD_VISIBILITY = Visibility.PUBLIC_ONLY;
/**
* Default instance with baseline visibility checking:
*
* - Only public fields visible
* - Only public getters, is-getters visible
* - All setters (regardless of access) visible
* - Only public Creators visible
*
*/
protected final static Value DEFAULT = new Value(DEFAULT_FIELD_VISIBILITY,
Visibility.PUBLIC_ONLY, Visibility.PUBLIC_ONLY, Visibility.ANY,
Visibility.PUBLIC_ONLY);
/**
* Empty instance that specifies no overrides, that is, all visibility
* levels set as {@link Visibility#DEFAULT}.
*/
protected final static Value NO_OVERRIDES = new Value(Visibility.DEFAULT,
Visibility.DEFAULT, Visibility.DEFAULT, Visibility.DEFAULT,
Visibility.DEFAULT);
protected final Visibility _fieldVisibility;
protected final Visibility _getterVisibility;
protected final Visibility _isGetterVisibility;
protected final Visibility _setterVisibility;
protected final Visibility _creatorVisibility;
private Value(Visibility fields,
Visibility getters, Visibility isGetters, Visibility setters,
Visibility creators) {
_fieldVisibility = fields;
_getterVisibility = getters;
_isGetterVisibility = isGetters;
_setterVisibility = setters;
_creatorVisibility = creators;
}
public static Value defaultVisibility() {
return DEFAULT;
}
public static Value noOverrides() {
return NO_OVERRIDES;
}
public static Value from(JsonAutoDetect src) {
return construct(src.fieldVisibility(),
src.getterVisibility(), src.isGetterVisibility(), src.setterVisibility(),
src.creatorVisibility());
}
/**
* Factory method for cnstructing instance with visibility of specified accessor
* (or, in case of ALL, all of them) set as specified; and the
* rest (if any) set as {@link Visibility#DEFAULT}).
*/
public static Value construct(PropertyAccessor acc, Visibility visibility) {
Visibility fields = Visibility.DEFAULT;
Visibility getters = Visibility.DEFAULT;
Visibility isGetters = Visibility.DEFAULT;
Visibility setters = Visibility.DEFAULT;
Visibility creators = Visibility.DEFAULT;
switch (acc) {
case CREATOR:
creators = visibility;
break;
case FIELD:
fields = visibility;
break;
case GETTER:
getters = visibility;
break;
case IS_GETTER:
isGetters = visibility;
break;
case NONE:
break;
case SETTER:
setters = visibility;
break;
case ALL: // default
fields = getters = isGetters = setters = creators = visibility;
break;
}
return construct(fields, getters, isGetters, setters, creators);
}
public static Value construct(Visibility fields,
Visibility getters, Visibility isGetters, Visibility setters,
Visibility creators)
{
Value v = _predefined(fields, getters, isGetters, setters, creators);
if (v == null) {
v = new Value(fields, getters, isGetters, setters, creators);
}
return v;
}
public Value withFieldVisibility(Visibility v) {
return construct(v, _getterVisibility, _isGetterVisibility,
_setterVisibility, _creatorVisibility);
}
public Value withGetterVisibility(Visibility v) {
return construct(_fieldVisibility, v, _isGetterVisibility,
_setterVisibility, _creatorVisibility);
}
public Value withIsGetterVisibility(Visibility v) {
return construct(_fieldVisibility, _getterVisibility, v,
_setterVisibility, _creatorVisibility);
}
public Value withSetterVisibility(Visibility v) {
return construct(_fieldVisibility, _getterVisibility, _isGetterVisibility,
v, _creatorVisibility);
}
public Value withCreatorVisibility(Visibility v) {
return construct(_fieldVisibility, _getterVisibility, _isGetterVisibility,
_setterVisibility, v);
}
public static Value merge(Value base, Value overrides)
{
return (base == null) ? overrides
: base.withOverrides(overrides);
}
public Value withOverrides(Value overrides) {
if ((overrides == null) || (overrides == NO_OVERRIDES) || (overrides == this)) {
return this;
}
if (_equals(this, overrides)) {
return this;
}
Visibility fields = overrides._fieldVisibility;
if (fields == Visibility.DEFAULT) {
fields = _fieldVisibility;
}
Visibility getters = overrides._getterVisibility;
if (getters == Visibility.DEFAULT) {
getters = _getterVisibility;
}
Visibility isGetters = overrides._isGetterVisibility;
if (isGetters == Visibility.DEFAULT) {
isGetters = _isGetterVisibility;
}
Visibility setters = overrides._setterVisibility;
if (setters == Visibility.DEFAULT) {
setters = _setterVisibility;
}
Visibility creators = overrides._creatorVisibility;
if (creators == Visibility.DEFAULT) {
creators = _creatorVisibility;
}
return construct(fields, getters, isGetters, setters, creators);
}
@Override
public Class valueFor() {
return JsonAutoDetect.class;
}
public Visibility getFieldVisibility() { return _fieldVisibility; }
public Visibility getGetterVisibility() { return _getterVisibility; }
public Visibility getIsGetterVisibility() { return _isGetterVisibility; }
public Visibility getSetterVisibility() { return _setterVisibility; }
public Visibility getCreatorVisibility() { return _creatorVisibility; }
// for JDK serialization
protected Object readResolve() {
Value v = _predefined(_fieldVisibility, _getterVisibility, _isGetterVisibility,
_setterVisibility, _creatorVisibility);
return (v == null) ? this : v;
}
@Override
public String toString() {
return String.format(
"JsonAutoDetect.Value(fields=%s,getters=%s,isGetters=%s,setters=%s,creators=%s)",
_fieldVisibility, _getterVisibility, _isGetterVisibility, _setterVisibility, _creatorVisibility
);
}
@Override
public int hashCode() {
return 1 + _fieldVisibility.ordinal()
^ (3 * _getterVisibility.ordinal())
- (7 * _isGetterVisibility.ordinal())
+ (11 * _setterVisibility.ordinal())
^ (13 * _creatorVisibility.ordinal())
;
}
@Override
public boolean equals(Object o) {
if (o == this) return true;
if (o == null) return false;
return (o.getClass() == getClass()) && _equals(this, (Value) o);
}
private static Value _predefined(Visibility fields,
Visibility getters, Visibility isGetters, Visibility setters,
Visibility creators)
{
if (fields == DEFAULT_FIELD_VISIBILITY) {
if ((getters == DEFAULT._getterVisibility)
&& (isGetters == DEFAULT._isGetterVisibility)
&& (setters == DEFAULT._setterVisibility)
&& (creators == DEFAULT._creatorVisibility)) {
return DEFAULT;
}
} else if (fields == Visibility.DEFAULT) {
if ((getters == Visibility.DEFAULT)
&& (isGetters == Visibility.DEFAULT)
&& (setters == Visibility.DEFAULT)
&& (creators == Visibility.DEFAULT)) {
return NO_OVERRIDES;
}
}
return null;
}
private static boolean _equals(Value a, Value b)
{
return (a._fieldVisibility == b._fieldVisibility)
&& (a._getterVisibility == b._getterVisibility)
&& (a._isGetterVisibility == b._isGetterVisibility)
&& (a._setterVisibility == b._setterVisibility)
&& (a._creatorVisibility == b._creatorVisibility)
;
}
}
}
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