diff options
Diffstat (limited to 'authz-core/src/main/java/com/att/authz/local/DataFile.java')
| -rw-r--r-- | authz-core/src/main/java/com/att/authz/local/DataFile.java | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/authz-core/src/main/java/com/att/authz/local/DataFile.java b/authz-core/src/main/java/com/att/authz/local/DataFile.java new file mode 100644 index 00000000..a54e8563 --- /dev/null +++ b/authz-core/src/main/java/com/att/authz/local/DataFile.java @@ -0,0 +1,186 @@ +/*******************************************************************************
+ * ============LICENSE_START====================================================
+ * * org.onap.aai
+ * * ===========================================================================
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * * Copyright © 2017 Amdocs
+ * * ===========================================================================
+ * * 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====================================================
+ * *
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * *
+ ******************************************************************************/
+package com.att.authz.local;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileChannel.MapMode;
+
+public class DataFile {
+ private RandomAccessFile rafile;
+ private FileChannel channel;
+ public MappedByteBuffer mapBuff;
+ private final File file;
+ private final String access;
+
+ public DataFile(File file, String access) {
+ this.file = file;
+ this.access = access;
+ }
+ public void open() throws IOException {
+ if(!file.exists()) throw new FileNotFoundException();
+ rafile = new RandomAccessFile(file,access);
+ channel = rafile.getChannel();
+ mapBuff = channel.map("r".equals(access)?MapMode.READ_ONLY:MapMode.READ_WRITE,0,channel.size());
+ }
+ public void close() throws IOException {
+ if(channel!=null){channel.close();}
+ if(rafile!=null) {rafile.close();}
+ mapBuff = null;
+ }
+
+ public long size() throws IOException {
+ return channel.size();
+ }
+
+ private synchronized int load(Token t) {
+ int len = Math.min(mapBuff.limit()-t.next,t.buff.length);
+ if(len>0) {
+ mapBuff.position(t.next);
+ mapBuff.get(t.buff,0,len);
+ }
+ return len<0?0:len;
+ }
+
+ public class Token {
+ private byte[] buff;
+ int pos, next, end;
+
+ public Token(int size) {
+ buff = new byte[size];
+ pos = next = end = 0;
+ }
+
+ public boolean pos(int to) {
+ pos = next = to;
+ return (end=load(this))>0;
+ }
+
+ public boolean nextLine() {
+ end = load(this);
+ pos = next;
+ for(int i=0;i<end;++i) {
+ if(buff[i]=='\n') {
+ end = i;
+ next += i+1;
+ return true;
+ }
+ }
+ return false;
+ }
+
+ public IntBuffer getIntBuffer() {
+ return ByteBuffer.wrap(buff).asIntBuffer();
+ }
+
+
+
+ public String toString() {
+ return new String(buff,0,end);
+ }
+ public class Field {
+ char delim;
+ int idx;
+ ByteBuffer bb;
+
+ public Field(char delimiter) {
+ delim = delimiter;
+ idx = 0;
+ bb = null;
+ }
+
+ public Field reset() {
+ idx = 0;
+ return this;
+ }
+
+ public String next() {
+ if(idx>=end)return null;
+ int start = idx;
+ byte c=0;
+ int endStr = -1;
+ while(idx<end && idx<buff.length && (c=buff[idx])!=delim && c!='\n') { // for DOS
+ if(c=='\r')endStr=idx;
+ ++idx;
+ }
+
+ if(endStr<0) {
+ endStr=idx-start;
+ } else {
+ endStr=endStr-start;
+ }
+ ++idx;
+ return new String(buff,start,endStr);
+ }
+
+ public String at(int fieldOffset) {
+ int start;
+ byte c=0;
+ for(int count = idx = start = 0; idx<end && idx<buff.length; ++idx) {
+ if((c=buff[idx])==delim || c=='\n') {
+ if(count++ == fieldOffset) {
+ break;
+ }
+ start = idx+1;
+ }
+ }
+ return new String(buff,start,(idx-start-(c=='\r'?1:0)));
+ }
+
+ public String atToEnd(int fieldOffset) {
+ int start;
+ byte c=0;
+ for(int count = idx = start = 0; idx<end && idx<buff.length; ++idx) {
+ if((c=buff[idx])==delim || c=='\n') {
+ if(count++ == fieldOffset) {
+ break;
+ }
+ start = idx+1;
+ }
+ }
+
+ for(; idx<end && idx<buff.length && (c=buff[idx])!='\n'; ++idx) {
+ ++idx;
+ }
+ return new String(buff,start,(idx-start-((c=='\r' || idx>=end)?1:0)));
+ }
+
+ }
+
+ public int pos() {
+ return pos;
+ }
+ }
+
+ public File file() {
+ return file;
+ }
+
+}
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