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/*-
* ============LICENSE_START==========================================
* OPENECOMP - DCAE
* ===================================================================
* Copyright (c) 2017 AT&T Intellectual Property. All rights reserved.
* ===================================================================
* 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.
* ============LICENSE_END============================================
*/
package org.openecomp.ncomp.utils.emf;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import org.eclipse.emf.ecore.EObject;
import org.openecomp.ncomp.webservice.utils.FileUtils;
public class EReader<T extends EObject> implements Iterator<T>, Iterable<T> {
private EStringUtil<T> util = null;
private BufferedReader reader;
private String fileName;
private String line;
private T e = null;
public EReader(String fileName2, EStringUtil<T> u, boolean isFilename) {
util = u;
fileName = fileName2;
if (isFilename)
reader = FileUtils.filename2reader(fileName2, u.errors);
else
reader = FileUtils.cmd2reader(fileName2);
}
public EReader(String fileName2, EStringUtil<T> u) {
util = u;
fileName = fileName2;
reader = FileUtils.filename2reader(fileName2, u.errors);
}
public EReader(File file, EStringUtil<T> u) {
util = u;
fileName = file.getName();
reader = FileUtils.filename2reader(fileName, u.errors);
}
/**
*
* @return An T object for the next line (null if empty). Note the object is
* not a new object. Uses EcoreUtils.copy if needed.
*/
private T findNext() {
line = null;
try {
if (reader == null)
return null;
line = reader.readLine();
if (line == null) {
reader.close();
reader = null;
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (line == null)
return null;
try {
return util.str2ecore(line);
} catch (Exception e) {
throw new RuntimeException("Read error in " + fileName + " : " + e);
}
}
public String getFileName() {
return fileName;
}
@Override
public boolean hasNext() {
if (e != null) return true;
e = findNext();
// TODO Auto-generated method stub
return e != null;
}
@Override
public void remove() {
throw new RuntimeException("Can not remove from a reader");
}
@Override
public T next() {
if (e != null) {
T ee = e;
e = null;
return ee;
}
return findNext();
}
@Override
public Iterator<T> iterator() {
return this;
}
public String getLine() {
return line;
}
}
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