tools/aconfig/templates/FeatureFlagsImpl.java.template

package {package_name};
{{ -if is_test_mode }}
import static java.util.stream.Collectors.toMap;

import java.util.HashMap;
import java.util.Map;
import java.util.stream.Stream;
{{ else}}
{{ if is_read_write- }}
import android.provider.DeviceConfig;
{{ -endif- }}
{{ endif }}
public final class FeatureFlagsImpl implements FeatureFlags \{
{{ for item in class_elements}}
    @Override
    public boolean {item.method_name}() \{
        {{ -if not is_test_mode- }}
        {{ if item.is_read_write }}
        return DeviceConfig.getBoolean(
            "{item.device_config_namespace}",
            "{item.device_config_flag}",
            {item.default_value}
        );
        {{ -else }}
        return {item.default_value};
        {{ -endif- }}
        {{ else }}
        return getFlag(Flags.FLAG_{item.flag_name_constant_suffix});
        {{ -endif }}
    }
{{ endfor- }}
{{ if is_test_mode }}
    public void setFlag(String flagName, boolean value) \{
        if (!this.mFlagMap.containsKey(flagName)) \{
            throw new IllegalArgumentException("no such flag" + flagName);
        }
        this.mFlagMap.put(flagName, value);
    }

    public void resetAll() \{
        for (Map.Entry entry : mFlagMap.entrySet()) \{
            entry.setValue(null);
        }
    }

    private boolean getFlag(String flagName) \{
        Boolean value = this.mFlagMap.get(flagName);
        if (value == null) \{
            throw new IllegalArgumentException(flagName + " is not set");
        }
        return value;
    }

    private HashMap<String, Boolean> mFlagMap = Stream.of(
            {{-for item in class_elements}}
            Flags.FLAG_{item.flag_name_constant_suffix}{{ if not @last }},{{ endif }}
            {{ -endfor }}
        )
        .collect(
            HashMap::new,
            (map, elem) -> map.put(elem, null),
            HashMap::putAll
        );
{{ -endif }}
}