1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17
18package android.filterpacks.text;
19
20import android.filterfw.core.Filter;
21import android.filterfw.core.FilterContext;
22import android.filterfw.core.Frame;
23import android.filterfw.core.FrameFormat;
24import android.filterfw.core.GenerateFieldPort;
25import android.filterfw.core.KeyValueMap;
26import android.filterfw.core.MutableFrameFormat;
27import android.filterfw.format.ObjectFormat;
28
29/**
30 * @hide
31 */
32public class StringSource extends Filter {
33
34    @GenerateFieldPort(name = "stringValue")
35    private String mString;
36
37    private FrameFormat mOutputFormat;
38
39    public StringSource(String name) {
40        super(name);
41    }
42
43    @Override
44    public void setupPorts() {
45        mOutputFormat = ObjectFormat.fromClass(String.class, FrameFormat.TARGET_SIMPLE);
46        addOutputPort("string", mOutputFormat);
47    }
48
49    @Override
50    public void process(FilterContext env) {
51        Frame output = env.getFrameManager().newFrame(mOutputFormat);
52        output.setObjectValue(mString);
53        output.setTimestamp(Frame.TIMESTAMP_UNKNOWN);
54        pushOutput("string", output);
55        closeOutputPort("string");
56    }
57
58
59}
60