com.fasterxml.jackson.jr.ob.impl.ValueLocatorBase Maven / Gradle / Ivy
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Simple data-binding that builds directly on jackson-core (streaming),
has no other dependencies, and provides additional builder-style content generator
package com.fasterxml.jackson.jr.ob.impl;
import java.io.File;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.URI;
import java.net.URL;
import java.util.*;
import com.fasterxml.jackson.core.TreeNode;
import com.fasterxml.jackson.jr.ob.JSON;
// Only public for reference by `AnnotationBasedValueRWModifier`
public abstract class ValueLocatorBase
{
/*
/**********************************************************************
/* Value constants for "simple" types
/**********************************************************************
*/
/* FAQ: Why ints? Why not Enums?!? Glad you asked: one reasons is class
* size reduction: javac creates annonymous inner class for each switch
* on enum (per referring type and enum: can combine multiple). So by
* not using enunms we try to minimize code foot print.
* But this is ONLY done because Value Type constants are NOT part of
* public API: if they were, size savings wouldn't make sense.
*
* One more note: negative values are used for dynamically introspected
* Beans.
*/
/**
* Type not yet resolved
*/
public final static int SER_UNKNOWN = 0;
/**
* All kinds of {@link java.util.Map}s.
*/
public final static int SER_MAP = 1;
/**
* All kinds of {@link java.util.List}s.
*/
public final static int SER_LIST = 2;
/**
* All kinds of {@link java.util.Collection}s other than {@link java.util.List}s
*/
public final static int SER_COLLECTION = 3;
/**
* Arrays of non-primitive types
*/
public final static int SER_OBJECT_ARRAY = 4;
public final static int SER_INT_ARRAY = 5;
public final static int SER_LONG_ARRAY = 6;
public final static int SER_BOOLEAN_ARRAY = 7;
/**
* An implementation of {@link com.fasterxml.jackson.core.TreeNode}
*/
public final static int SER_TREE_NODE = 8;
// // // String(-like) types
public final static int SER_STRING = 9;
public final static int SER_CHARACTER_SEQUENCE = 10;
public final static int SER_CHAR_ARRAY = 11;
public final static int SER_BYTE_ARRAY = 12;
// // // Numbers
public final static int SER_NUMBER_BYTE = 13;
public final static int SER_NUMBER_SHORT = 14;
public final static int SER_NUMBER_INTEGER = 15;
public final static int SER_NUMBER_LONG = 16;
public final static int SER_NUMBER_FLOAT = 17;
public final static int SER_NUMBER_DOUBLE = 18;
public final static int SER_NUMBER_BIG_INTEGER = 19;
public final static int SER_NUMBER_BIG_DECIMAL = 20;
// // // Other specific scalar types
public final static int SER_BOOLEAN = 21;
public final static int SER_CHAR = 22;
public final static int SER_ENUM = 23;
public final static int SER_DATE = 24;
public final static int SER_CALENDAR = 25;
public final static int SER_CLASS = 26;
public final static int SER_FILE = 27;
public final static int SER_UUID = 28;
public final static int SER_URL = 29;
public final static int SER_URI = 30;
// // // Iterate-able types
/**
* Anything that implements {@link java.lang.Iterable}, but not
* {@link java.util.Collection}.
*/
public final static int SER_ITERABLE = 31;
/*
/**********************************************************************
/* Other constants
/**********************************************************************
*/
protected final static int CACHE_FLAGS = JSON.CACHE_FLAGS;
/*
/**********************************************************************
/* Methods for sub-classes
/**********************************************************************
*/
protected int _findSimpleType(Class raw, boolean forSer)
{
if (raw == String.class) {
return SER_STRING;
}
if (raw.isArray()) {
Class elemType = raw.getComponentType();
if (elemType.isPrimitive()) {
if (raw == byte[].class) {
return SER_BYTE_ARRAY;
}
if (raw == char[].class) {
return SER_CHAR_ARRAY;
}
if (raw == int[].class) {
return SER_INT_ARRAY;
}
if (raw == long[].class) {
return SER_LONG_ARRAY;
}
if (raw == boolean[].class) {
return SER_BOOLEAN_ARRAY;
}
// Hmmh. Could support all types; add as/when needed
return SER_UNKNOWN;
}
return SER_OBJECT_ARRAY;
}
if (raw.isPrimitive()) {
if (raw == Boolean.TYPE) return SER_BOOLEAN;
if (raw == Integer.TYPE) return SER_NUMBER_INTEGER;
if (raw == Long.TYPE) return SER_NUMBER_LONG;
if (raw == Byte.TYPE) return SER_NUMBER_BYTE;
if (raw == Short.TYPE) return SER_NUMBER_SHORT;
if (raw == Double.TYPE) return SER_NUMBER_DOUBLE;
if (raw == Float.TYPE) return SER_NUMBER_FLOAT;
if (raw == Character.TYPE) return SER_CHAR;
throw new IllegalArgumentException("Unrecognized primitive type: "+raw.getName());
}
if (raw == Boolean.class) {
return SER_BOOLEAN;
}
if (Number.class.isAssignableFrom(raw)) {
if (raw == Integer.class) return SER_NUMBER_INTEGER;
if (raw == Long.class) return SER_NUMBER_LONG;
if (raw == Byte.class) return SER_NUMBER_BYTE;
if (raw == Short.class) return SER_NUMBER_SHORT;
if (raw == Double.class) return SER_NUMBER_DOUBLE;
if (raw == Float.class) return SER_NUMBER_FLOAT;
if (raw == BigDecimal.class) return SER_NUMBER_BIG_DECIMAL;
if (raw == BigInteger.class) {
return SER_NUMBER_BIG_INTEGER;
}
// What numeric type is this? Could consider "string-like" but...
return SER_UNKNOWN;
}
if (raw == Character.class) {
return SER_CHAR;
}
if (raw.isEnum()) {
return SER_ENUM;
}
if (Map.class.isAssignableFrom(raw)) {
return SER_MAP;
}
if (Collection.class.isAssignableFrom(raw)) {
if (List.class.isAssignableFrom(raw)) {
// One more thing: here we assume LIST means efficient random access
if (RandomAccess.class.isAssignableFrom(raw)) {
return SER_LIST;
}
// and if not, consider "only" a collection
}
return SER_COLLECTION;
}
if (TreeNode.class.isAssignableFrom(raw)) {
// should we require more accurate type for deser?
return SER_TREE_NODE;
}
// Misc String-like types
if (Calendar.class.isAssignableFrom(raw)) {
return SER_CALENDAR;
}
if (raw == Class.class) {
return SER_CLASS;
}
if (Date.class.isAssignableFrom(raw)) {
return SER_DATE;
}
if (File.class.isAssignableFrom(raw)) {
return SER_FILE;
}
if (URL.class.isAssignableFrom(raw)) {
return SER_URL;
}
if (URI.class.isAssignableFrom(raw)) {
return SER_URI;
}
if (UUID.class.isAssignableFrom(raw)) {
return SER_UUID;
}
/* May or may not help with deser, but recognized nonetheless;
* on assumption that Beans should rarely implement `CharSequence`
*/
if (CharSequence.class.isAssignableFrom(raw)) {
return SER_CHARACTER_SEQUENCE;
}
/* `Iterable` can be added on all kinds of things, and it won't
* help at all with deserialization; hence only use for serialization.
*/
if (forSer && Iterable.class.isAssignableFrom(raw)) {
return SER_ITERABLE;
}
// Ok. I give up, no idea!
return SER_UNKNOWN;
}
}
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