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package eu.dnetlib.data.search.utils.cql;
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import org.apache.log4j.Logger;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* Created by kiatrop on 28/9/2016.
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*/
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public class CQLQueryBuilder {
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private final static Logger logger = Logger.getLogger(CQLQueryBuilder.class);
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public enum Operator {
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AND("and"),
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OR("or"),
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NOT("not"),
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EQUAL("="),
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EXACT("exact"),
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NOTEQUAL("<>"),
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NONE("");
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private String value;
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Operator(String value) {
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this.value = value;
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}
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private String getValue() {
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return value;
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}
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@Override
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public String toString() {
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return this.getValue();
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}
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}
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public static void appendQuery(StringBuilder stringBuilder, String query) {
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if (query != null && !query.trim().isEmpty()) {
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appendSimpleTerm(stringBuilder, Operator.AND, query);
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}
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}
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public static void appendKeywords(StringBuilder stringBuilder, String keywords) {
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if (keywords != null && !keywords.trim().isEmpty()) {
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List<String> matchList = new ArrayList<String>();
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Pattern regex = Pattern.compile("[^\\s\"']+|\"[^\"]*\"|'[^']*'");
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Matcher regexMatcher = regex.matcher(keywords);
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while (regexMatcher.find()) {
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matchList.add(regexMatcher.group());
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}
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for (String keyword : matchList) {
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if (keyword.endsWith("\"") && keyword.startsWith("\"")) {
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appendSimpleQuotedTerm(stringBuilder, Operator.AND, keyword);
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} else {
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appendSimpleTerm(stringBuilder, CQLQueryBuilder.Operator.AND, keyword.replaceAll("\"",""));
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}
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}
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}
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}
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public static void appendSimpleTerm(StringBuilder stringBuilder, Operator queryOperator, String value) {
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if (!stringBuilder.toString().isEmpty()) {
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stringBuilder.append(' ').append(queryOperator).append(" (").append(value).append(')');
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} else {
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stringBuilder.append("(").append(value).append(')');
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}
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}
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public static void appendSimpleQuotedTerm(StringBuilder stringBuilder, Operator queryOperator, String value) {
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if (!stringBuilder.toString().isEmpty()) {
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stringBuilder.append(' ').append(queryOperator).append(" (__all exact ").append(value).append(")");
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} else {
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stringBuilder.append(" (__all exact ").append(value).append(")");
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}
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}
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public static void appendFieldTerm(StringBuilder stringBuilder, Operator queryOperator, String indexFieldName, Operator termOperator, String fieldValue) {
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stringBuilder.append(' ').append(queryOperator).
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append(" (").append(indexFieldName).append(' ').append(termOperator).append(' ').append(fieldValue).append(")");
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}
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public static void appendFieldQuotedTerm(StringBuilder stringBuilder, Operator queryOperator, String indexFieldName, Operator termOperator, String fieldValue) {
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stringBuilder.append(' ').append(queryOperator).
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append(" (").append(indexFieldName).append(' ').append(Operator.EXACT).append(" \"").append(fieldValue).append("\")");
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}
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public static void appendFieldTerms(StringBuilder stringBuilder, Operator queryOperator, String indexFieldName, Operator termOperator, List<String> fieldValues) {
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for (String fieldValue: fieldValues) {
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appendFieldTerm(stringBuilder, queryOperator, indexFieldName, termOperator, fieldValue);
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}
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}
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public static void appendFieldQuotedTerms(StringBuilder stringBuilder, Operator queryOperator, String indexFieldName, Operator termOperator, List<String> fieldValues) {
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for (String fieldValue: fieldValues) {
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appendFieldQuotedTerm(stringBuilder, queryOperator, indexFieldName, termOperator, fieldValue);
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}
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}
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public static void appendEnhancedKeywords(StringBuilder stringBuilder, String keywords) {
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if (keywords != null && !keywords.trim().isEmpty()) {
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appendSimpleTerm(stringBuilder, CQLQueryBuilder.Operator.AND, keywords);
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}
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}
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}
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