samples/VoicemailProviderDemo/src/com/example/android/voicemail/common/core/VoicemailFilter.java

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.voicemail.common.core;

/**
 * An object that can be used to apply filter on voicemail queries made through the voicemail helper
 * interface.
 */
public interface VoicemailFilter {
    /** Returns the where clause for this filter. Returns null if the filter is empty. */
    public String getWhereClause();
}