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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.query.textserialize.serializer;
import com.yahoo.prelude.query.Item;
import com.yahoo.search.query.textserialize.item.ItemExecutorRegistry;
import java.util.List;
import java.util.Map;
import static com.yahoo.search.query.textserialize.item.ListUtil.butFirst;
import static com.yahoo.search.query.textserialize.item.ListUtil.first;
/**
* @author Tony Vaagenes
*/
class Serializer {
static String serialize(Object child, ItemIdMapper itemIdMapper) {
if (child instanceof DispatchForm) {
return ((DispatchForm) child).serialize(itemIdMapper);
} else if (child instanceof Item) {
return serializeItem((Item) child, itemIdMapper);
} else if (child instanceof String) {
return serializeString((String) child);
} else if (child instanceof Number) {
return child.toString();
} else if (child instanceof Map) {
return serializeMap((Map<?, ?>)child, itemIdMapper);
} else if (child instanceof List) {
return serializeList((List<?>)child, itemIdMapper);
} else {
throw new IllegalArgumentException("Can't serialize type " + child.getClass());
}
}
private static String serializeString(String string) {
return '"' + string.replace("\\", "\\\\").replace("\"", "\\\"") + '"';
}
static String serializeList(List<?> list, ItemIdMapper itemIdMapper) {
StringBuilder builder = new StringBuilder();
builder.append('[');
if (!list.isEmpty()) {
builder.append(serialize(first(list), itemIdMapper));
for (Object element : butFirst(list)) {
builder.append(", ").append(serialize(element, itemIdMapper));
}
}
builder.append(']');
return builder.toString();
}
static String serializeMap(Map<?, ?> map, ItemIdMapper itemIdMapper) {
StringBuilder builder = new StringBuilder();
builder.append("{");
if (!map.isEmpty()) {
serializeEntry(builder, first(map.entrySet()), itemIdMapper);
for (Map.Entry<?, ?> entry : butFirst(map.entrySet())) {
builder.append(", ");
serializeEntry(builder, entry, itemIdMapper);
}
}
builder.append('}');
return builder.toString();
}
static void serializeEntry(StringBuilder builder, Map.Entry<?, ?> entry, ItemIdMapper itemIdMapper) {
builder.append(serialize(entry.getKey(), itemIdMapper)).append(' ').
append(serialize(entry.getValue(), itemIdMapper));
}
static String serializeItem(Item item, ItemIdMapper itemIdMapper) {
return ItemExecutorRegistry.getByType(item.getItemType()).itemToForm(item, itemIdMapper).serialize(itemIdMapper);
}
}
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