/**
* MVEL 2.0
* Copyright (C) 2007 The Codehaus
* Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor
*
* 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 org.mvel2.templates.util;
import org.mvel2.templates.TemplateError;
import org.mvel2.templates.res.Node;
import org.mvel2.templates.res.TerminalNode;
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import static java.nio.ByteBuffer.allocateDirect;
import static org.mvel2.util.ParseTools.balancedCapture;
public class TemplateTools {
public static Node getLastNode(Node node) {
Node n = node;
while (true) {
if (n.getNext() instanceof TerminalNode) return n;
n = n.getNext();
}
}
public static int captureToEOS(char[] expression, int cursor) {
int length = expression.length;
while (cursor != length) {
switch (expression[cursor]) {
case '(':
case '[':
case '{':
cursor = balancedCapture(expression, cursor, expression[cursor]);
break;
case ';':
case '}':
return cursor;
}
cursor++;
}
return cursor;
}
public static String readInFile(String file) {
return readInFile(new File(file));
}
public static String readInFile(File file) {
try {
FileChannel fc = new FileInputStream(file).getChannel();
ByteBuffer buf = allocateDirect(10);
StringBuilder appender = new StringBuilder();
int read;
while (true) {
buf.rewind();
if ((read = fc.read(buf)) != -1) {
buf.rewind();
for (; read != 0; read--) {
appender.append((char) buf.get());
}
}
else {
break;
}
}
fc.close();
return appender.toString();
}
catch (FileNotFoundException e) {
throw new TemplateError("cannot include template '" + file.getName() + "': file not found.");
}
catch (IOException e) {
throw new TemplateError("unknown I/O exception while including '" + file.getName() + "' (stacktrace nested)", e);
}
}
public static String readStream(InputStream instream) {
try {
byte[] buf = new byte[10];
StringBuilder appender = new StringBuilder();
int read;
while ((read = instream.read(buf)) != -1) {
for (int i = 0; i < read; i++) {
appender.append((char) buf[i]);
}
}
return appender.toString();
}
catch (NullPointerException e) {
if (instream == null) {
throw new TemplateError("null input stream", e);
}
else {
throw e;
}
}
catch (IOException e) {
throw new TemplateError("unknown I/O exception while including (stacktrace nested)", e);
}
}
}