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Jackson Data Binding Source Code
Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".
Jackson Databind Source Code files are provided in the source packge (jackson-databind-2.14.0-sources.jar). You can download it at Jackson Maven Website.
You can also browse Jackson Databind Source Code below:
✍: FYIcenter.com
⏎ com/fasterxml/jackson/databind/deser/impl/JDKValueInstantiators.java
package com.fasterxml.jackson.databind.deser.impl; import java.io.IOException; import java.util.*; import com.fasterxml.jackson.core.JsonLocation; import com.fasterxml.jackson.databind.DeserializationConfig; import com.fasterxml.jackson.databind.DeserializationContext; import com.fasterxml.jackson.databind.deser.ValueInstantiator; import com.fasterxml.jackson.databind.deser.std.JsonLocationInstantiator; /** * Container for a set of {@link ValueInstantiator}s used for certain critical * JDK value types, either as performance optimization for initialization time observed * by profiling, or due to difficulty in otherwise finding constructors. * * @since 2.10 */ public abstract class JDKValueInstantiators { public static ValueInstantiator findStdValueInstantiator(DeserializationConfig config, Class<?> raw) { if (raw == JsonLocation.class) { return new JsonLocationInstantiator(); } // [databind#1868]: empty List/Set/Map // [databind#2416]: optimize commonly needed default creators if (Collection.class.isAssignableFrom(raw)) { if (raw == ArrayList.class) { return ArrayListInstantiator.INSTANCE; } if (Collections.EMPTY_SET.getClass() == raw) { return new ConstantValueInstantiator(Collections.EMPTY_SET); } if (Collections.EMPTY_LIST.getClass() == raw) { return new ConstantValueInstantiator(Collections.EMPTY_LIST); } } else if (Map.class.isAssignableFrom(raw)) { if (raw == LinkedHashMap.class) { return LinkedHashMapInstantiator.INSTANCE; } if (raw == HashMap.class) { return HashMapInstantiator.INSTANCE; } if (Collections.EMPTY_MAP.getClass() == raw) { return new ConstantValueInstantiator(Collections.EMPTY_MAP); } } return null; } private static class ArrayListInstantiator extends ValueInstantiator.Base implements java.io.Serializable { private static final long serialVersionUID = 2L; public final static ArrayListInstantiator INSTANCE = new ArrayListInstantiator(); public ArrayListInstantiator() { super(ArrayList.class); } @Override public boolean canInstantiate() { return true; } @Override public boolean canCreateUsingDefault() { return true; } @Override public Object createUsingDefault(DeserializationContext ctxt) throws IOException { return new ArrayList<>(); } } private static class HashMapInstantiator extends ValueInstantiator.Base implements java.io.Serializable { private static final long serialVersionUID = 2L; public final static HashMapInstantiator INSTANCE = new HashMapInstantiator(); public HashMapInstantiator() { super(HashMap.class); } @Override public boolean canInstantiate() { return true; } @Override public boolean canCreateUsingDefault() { return true; } @Override public Object createUsingDefault(DeserializationContext ctxt) throws IOException { return new HashMap<>(); } } private static class LinkedHashMapInstantiator extends ValueInstantiator.Base implements java.io.Serializable { private static final long serialVersionUID = 2L; public final static LinkedHashMapInstantiator INSTANCE = new LinkedHashMapInstantiator(); public LinkedHashMapInstantiator() { super(LinkedHashMap.class); } @Override public boolean canInstantiate() { return true; } @Override public boolean canCreateUsingDefault() { return true; } @Override public Object createUsingDefault(DeserializationContext ctxt) throws IOException { return new LinkedHashMap<>(); } } private static class ConstantValueInstantiator extends ValueInstantiator.Base implements java.io.Serializable { private static final long serialVersionUID = 2L; protected final Object _value; public ConstantValueInstantiator(Object value) { super(value.getClass()); _value = value; } @Override // yes, since default ctor works public boolean canInstantiate() { return true; } @Override public boolean canCreateUsingDefault() { return true; } @Override public Object createUsingDefault(DeserializationContext ctxt) throws IOException { return _value; } } }
⏎ com/fasterxml/jackson/databind/deser/impl/JDKValueInstantiators.java
Or download all of them as a single archive file:
File name: jackson-databind-2.14.0-sources.jar File size: 1187952 bytes Release date: 2022-11-05 Download
⇒ Jackson Annotations Source Code
⇐ Download and Install Jackson Binary Package
2022-03-29, 81022👍, 0💬
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