package com.fasterxml.jackson.databind.node; import java.io.IOException; import com.fasterxml.jackson.core.*; import com.fasterxml.jackson.databind.JsonSerializable; import com.fasterxml.jackson.databind.SerializerProvider; import com.fasterxml.jackson.databind.util.RawValue; /** * Value node that contains a wrapped POJO, to be serialized as * a JSON constructed through data mapping (usually done by * calling {@link com.fasterxml.jackson.databind.ObjectMapper}). */ public class POJONode extends ValueNode { protected final Object _value; public POJONode(Object v) { _value = v; } /* /********************************************************** /* Base class overrides /********************************************************** */ @Override public JsonNodeType getNodeType() { return JsonNodeType.POJO; } @Override public JsonToken asToken() { return JsonToken.VALUE_EMBEDDED_OBJECT; } /** * As it is possible that some implementations embed byte[] as POJONode * (despite optimal being {@link BinaryNode}), let's add support for exposing * binary data here too. */ @Override public byte[] binaryValue() throws IOException { if (_value instanceof byte[]) { return (byte[]) _value; } return super.binaryValue(); } /* /********************************************************** /* General type coercions /********************************************************** */ @Override public String asText() { return (_value == null) ? "null" : _value.toString(); } @Override public String asText(String defaultValue) { return (_value == null) ? defaultValue : _value.toString(); } @Override public boolean asBoolean(boolean defaultValue) { if (_value != null && _value instanceof Boolean) { return ((Boolean) _value).booleanValue(); } return defaultValue; } @Override public int asInt(int defaultValue) { if (_value instanceof Number) { return ((Number) _value).intValue(); } return defaultValue; } @Override public long asLong(long defaultValue) { if (_value instanceof Number) { return ((Number) _value).longValue(); } return defaultValue; } @Override public double asDouble(double defaultValue) { if (_value instanceof Number) { return ((Number) _value).doubleValue(); } return defaultValue; } /* /********************************************************** /* Public API, serialization /********************************************************** */ @Override public final void serialize(JsonGenerator gen, SerializerProvider serializers) throws IOException { if (_value == null) { serializers.defaultSerializeNull(gen); } else if (_value instanceof JsonSerializable) { ((JsonSerializable) _value).serialize(gen, serializers); } else { gen.writeObject(_value); } } /* /********************************************************** /* Extended API /********************************************************** */ /** * Method that can be used to access the POJO this node wraps. */ public Object getPojo() { return _value; } /* /********************************************************** /* Overridden standard methods /********************************************************** */ @Override public boolean equals(Object o) { if (o == this) return true; if (o == null) return false; if (o instanceof POJONode) { return _pojoEquals((POJONode) o); } return false; } /** * @since 2.3 */ protected boolean _pojoEquals(POJONode other) { if (_value == null) { return other._value == null; } return _value.equals(other._value); } @Override public int hashCode() { return _value.hashCode(); } @Override public String toString() { // [databind#743]: Let's try indicating content type, for debugging purposes if (_value instanceof byte[]) { return String.format("(binary value of %d bytes)", ((byte[]) _value).length); } if (_value instanceof RawValue) { return String.format("(raw value '%s')", ((RawValue) _value).toString()); } return String.valueOf(_value); } }