package com.facebook.presto.hive.shaded.org.codehaus.jackson.map.deser.impl;
import com.facebook.presto.hive.shaded.org.codehaus.jackson.JsonParser;
import com.facebook.presto.hive.shaded.org.codehaus.jackson.map.DeserializationContext;
import com.facebook.presto.hive.shaded.org.codehaus.jackson.map.deser.SettableAnyProperty;
import com.facebook.presto.hive.shaded.org.codehaus.jackson.map.deser.SettableBeanProperty;
/**
* Simple container used for temporarily buffering a set of
* <code>PropertyValue</code>s.
* Using during construction of beans (and Maps) that use Creators,
* and hence need buffering before instance (that will have properties
* to assign values to) is constructed.
*/
public final class PropertyValueBuffer
{
final JsonParser _parser;
final DeserializationContext _context;
/**
* Buffer used for storing creator parameters for constructing
* instance
*/
final Object[] _creatorParameters;
/**
* Number of creator parameters we are still missing.
*<p>
* NOTE: assumes there are no duplicates, for now.
*/
private int _paramsNeeded;
/**
* If we get non-creator parameters before or between
* creator parameters, those need to be buffered. Buffer
* is just a simple linked list
*/
private PropertyValue _buffered;
public PropertyValueBuffer(JsonParser jp, DeserializationContext ctxt, int paramCount)
{
_parser = jp;
_context = ctxt;
_paramsNeeded = paramCount;
_creatorParameters = new Object[paramCount];
}
public void inject(SettableBeanProperty[] injectableProperties)
{
for (int i = 0, len = injectableProperties.length; i < len; ++i) {
SettableBeanProperty prop = injectableProperties[i];
if (prop != null) {
// null since there is no POJO yet
_creatorParameters[i] = _context.findInjectableValue(prop.getInjectableValueId(),
prop, null);
}
}
}
/**
* @param defaults If any of parameters requires nulls to be replaced with a non-null
* object (usually primitive types), this is a non-null array that has such replacement
* values (and nulls for cases where nulls are ok)
*/
protected final Object[] getParameters(Object[] defaults)
{
if (defaults != null) {
for (int i = 0, len = _creatorParameters.length; i < len; ++i) {
if (_creatorParameters[i] == null) {
Object value = defaults[i];
if (value != null) {
_creatorParameters[i] = value;
}
}
}
}
return _creatorParameters;
}
protected PropertyValue buffered() { return _buffered; }
/**
* @return True if we have received all creator parameters
*/
public boolean assignParameter(int index, Object value) {
_creatorParameters[index] = value;
return --_paramsNeeded <= 0;
}
public void bufferProperty(SettableBeanProperty prop, Object value) {
_buffered = new PropertyValue.Regular(_buffered, value, prop);
}
public void bufferAnyProperty(SettableAnyProperty prop, String propName, Object value) {
_buffered = new PropertyValue.Any(_buffered, value, prop, propName);
}
public void bufferMapProperty(Object key, Object value) {
_buffered = new PropertyValue.Map(_buffered, value, key);
}
}