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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
*
* 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.android.ide.eclipse.ndk.internal.templates;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
/**
* Reads from a template substituting marked values from the supplied Map.
*/
public class TemplatedInputStream extends InputStream {
private final InputStream mIn;
private final Map<String, String> mMap;
private char[] mSub;
private int mPos;
private int mMark;
public TemplatedInputStream(InputStream in, Map<String, String> map) {
this.mIn = in;
this.mMap = map;
}
@Override
public int read() throws IOException {
// if from a mark, return the char
if (mMark != 0) {
int c = mMark;
mMark = 0;
return c;
}
// return char from sub layer if available
if (mSub != null) {
char c = mSub[mPos++];
if (mPos >= mSub.length)
mSub = null;
return c;
}
int c = mIn.read();
if (c == '%') {
// check if it's a sub
c = mIn.read();
if (c == '{') {
// it's a sub
StringBuffer buff = new StringBuffer();
for (c = mIn.read(); c != '}' && c >= 0; c = mIn.read())
buff.append((char) c);
String str = mMap.get(buff.toString());
if (str != null) {
mSub = str.toCharArray();
mPos = 0;
}
return read(); // recurse to get the real char
} else {
// not a sub
mMark = c;
return '%';
}
}
return c;
}
@Override
public void close() throws IOException {
super.close();
mIn.close();
}
}
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