63 lines
2.2 KiB
Java
63 lines
2.2 KiB
Java
package nodomain.freeyourgadget.gadgetbridge.service.btle;
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import android.bluetooth.BluetoothGatt;
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import android.bluetooth.BluetoothGattCharacteristic;
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import java.util.Date;
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import nodomain.freeyourgadget.gadgetbridge.util.DateTimeUtils;
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/**
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* The Bluedroid implementation only allows performing one GATT request at a time.
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* As they are asynchronous anyway, we encapsulate every GATT request (read and write)
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* inside a runnable action.
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* <p/>
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* These actions are then executed one after another, ensuring that every action's result
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* has been posted before invoking the next action.
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*/
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public abstract class BtLEAction {
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private final BluetoothGattCharacteristic characteristic;
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private final long creationTimestamp;
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public BtLEAction(BluetoothGattCharacteristic characteristic) {
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this.characteristic = characteristic;
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creationTimestamp = System.currentTimeMillis();
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}
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/**
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* Returns true if this action expects an (async) result which must
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* be waited for, before continuing with other actions.
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* <p/>
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* This is needed because the current Bluedroid stack can only deal
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* with one single bluetooth operation at a time.
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*/
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public abstract boolean expectsResult();
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/**
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* Executes this action, e.g. reads or write a GATT characteristic.
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*
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* @param gatt the characteristic to manipulate, or null if none.
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* @return true if the action was successful, false otherwise
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*/
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public abstract boolean run(BluetoothGatt gatt);
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/**
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* Returns the GATT characteristic being read/written/...
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*
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* @return the GATT characteristic, or <code>null</code>
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*/
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public BluetoothGattCharacteristic getCharacteristic() {
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return characteristic;
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}
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protected String getCreationTime() {
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return DateTimeUtils.formatDateTime(new Date(creationTimestamp));
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}
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public String toString() {
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BluetoothGattCharacteristic characteristic = getCharacteristic();
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String uuid = characteristic == null ? "(null)" : characteristic.getUuid().toString();
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return getCreationTime() + ": " + getClass().getSimpleName() + " on characteristic: " + uuid;
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}
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}
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