com.espertech.esper.rowregex.EventRowRegexNFAViewUtil Maven / Gradle / Ivy
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Complex event processing and event series analysis component
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/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.rowregex;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.collection.Pair;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.*;
public class EventRowRegexNFAViewUtil {
protected static EventBean[] getMultimatchArray(int[] multimatchStreamNumToVariable, RegexNFAStateEntry state, int stream) {
if (state.getOptionalMultiMatches() == null) {
return null;
}
int index = multimatchStreamNumToVariable[stream];
MultimatchState multiMatches = state.getOptionalMultiMatches()[index];
if (multiMatches == null) {
return null;
}
return multiMatches.getShrinkEventArray();
}
protected static String printStates(List states, Map streamsVariables, LinkedHashMap> variableStreams, int[] multimatchStreamNumToVariable) {
StringBuilder buf = new StringBuilder();
String delimiter = "";
for (RegexNFAStateEntry state : states) {
buf.append(delimiter);
buf.append(state.getState().getNodeNumNested());
buf.append("{");
EventBean[] eventsPerStream = state.getEventsPerStream();
if (eventsPerStream == null) {
buf.append("null");
} else {
String eventDelimiter = "";
for (Map.Entry streamVariable : streamsVariables.entrySet()) {
buf.append(eventDelimiter);
buf.append(streamVariable.getValue());
buf.append('=');
boolean single = !variableStreams.get(streamVariable.getValue()).getSecond();
if (single) {
if (eventsPerStream[streamVariable.getKey()] == null) {
buf.append("null");
} else {
buf.append(eventsPerStream[streamVariable.getKey()].getUnderlying());
}
} else {
int streamNum = state.getState().getStreamNum();
int index = multimatchStreamNumToVariable[streamNum];
if (state.getOptionalMultiMatches() == null) {
buf.append("null-mm");
} else if (state.getOptionalMultiMatches()[index] == null) {
buf.append("no-entry");
} else {
buf.append("{");
String arrayEventDelimiter = "";
EventBean[] multiMatch = state.getOptionalMultiMatches()[index].getBuffer();
int count = state.getOptionalMultiMatches()[index].getCount();
for (int i = 0; i < count; i++) {
buf.append(arrayEventDelimiter);
buf.append(multiMatch[i].getUnderlying());
arrayEventDelimiter = ", ";
}
buf.append("}");
}
}
eventDelimiter = ", ";
}
}
buf.append("}");
delimiter = ", ";
}
return buf.toString();
}
protected static String print(RegexNFAState[] states) {
StringWriter writer = new StringWriter();
PrintWriter buf = new PrintWriter(writer);
Stack currentStack = new Stack();
print(Arrays.asList(states), buf, 0, currentStack);
return writer.toString();
}
protected static void print(List states, PrintWriter writer, int indent, Stack currentStack) {
for (RegexNFAState state : states) {
indent(writer, indent);
if (currentStack.contains(state)) {
writer.println("(self)");
} else {
writer.println(printState(state));
currentStack.push(state);
print(state.getNextStates(), writer, indent + 4, currentStack);
currentStack.pop();
}
}
}
private static String printState(RegexNFAState state) {
if (state instanceof RegexNFAStateEnd) {
return "#" + state.getNodeNumNested();
} else {
return "#" + state.getNodeNumNested() + " " + state.getVariableName() + " s" + state.getStreamNum() + " defined as " + state;
}
}
private static void indent(PrintWriter writer, int indent) {
for (int i = 0; i < indent; i++) {
writer.append(' ');
}
}
}