44 lines
1.7 KiB
Java
44 lines
1.7 KiB
Java
package com.github.dtschust.zork.parser;
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import com.github.dtschust.zork.ZorkGame;
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import com.github.dtschust.zork.objects.*;
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import java.util.Map;
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import static com.github.dtschust.zork.objects.ZorkObjectTypes.*;
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public abstract class ZorkParser {
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private final Map<ZorkObjectTypes, PropertyParseStrategy<? extends ZorkObject>> strategies;
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public ZorkParser(final PropertyParseStrategy<ZorkCreature> creatureStrategy,
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final PropertyParseStrategy<ZorkContainer> containerStrategy,
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final PropertyParseStrategy<ZorkItem> itemStrategy,
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final PropertyParseStrategy<ZorkRoom> roomStrategy) {
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this.strategies = Map.ofEntries(
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Map.entry(CREATURE, creatureStrategy),
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Map.entry(CONTAINER, containerStrategy),
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Map.entry(ITEM, itemStrategy),
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Map.entry(ROOM, roomStrategy)
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);
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}
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protected abstract Property getRootProperty(final String filename);
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public ZorkGame parse(final String filename) {
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ZorkGame data = new ZorkGame();
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final Property rootElement = getRootProperty(filename);
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// Every single first generation child is a room, container, creature, or item. So load them in
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for (final Property element : rootElement.subProperties()) {
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final String name = element.name();
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final ZorkObjectTypes t = ZorkObjectTypes.fromPropertyName(name)
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.orElseThrow(() -> new IllegalStateException("Unexpected value: " + name));
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final ZorkObject built = strategies.get(t).parse(element);
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data.addObjectThroughLookup(t, built);
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}
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return data;
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}
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}
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