--- /dev/null
+package org.apache.lucene.queryParser.core.nodes;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import org.apache.lucene.queryParser.core.parser.EscapeQuerySyntax;
+import org.apache.lucene.queryParser.core.parser.EscapeQuerySyntax.Type;
+
+/**
+ * A {@link PathQueryNode} is used to store queries like
+ * /company/USA/California /product/shoes/brown. QueryText are objects that
+ * contain the text, begin position and end position in the query.
+ * <p>
+ * Example how the text parser creates these objects:
+ * </p>
+ * <pre>
+ * List values = ArrayList();
+ * values.add(new PathQueryNode.QueryText("company", 1, 7));
+ * values.add(new PathQueryNode.QueryText("USA", 9, 12));
+ * values.add(new PathQueryNode.QueryText("California", 14, 23));
+ * QueryNode q = new PathQueryNode(values);
+ * </pre>
+ */
+public class PathQueryNode extends QueryNodeImpl {
+
+ private static final long serialVersionUID = -8325921322405804789L;
+
+ public static class QueryText implements Cloneable {
+ CharSequence value = null;
+ /**
+ * != null The term's begin position.
+ */
+ int begin;
+
+ /**
+ * The term's end position.
+ */
+ int end;
+
+ /**
+ * @param value
+ * - text value
+ * @param begin
+ * - position in the query string
+ * @param end
+ * - position in the query string
+ */
+ public QueryText(CharSequence value, int begin, int end) {
+ super();
+ this.value = value;
+ this.begin = begin;
+ this.end = end;
+ }
+
+ @Override
+ public QueryText clone() throws CloneNotSupportedException {
+ QueryText clone = (QueryText) super.clone();
+ clone.value = this.value;
+ clone.begin = this.begin;
+ clone.end = this.end;
+ return clone;
+ }
+
+ /**
+ * @return the value
+ */
+ public CharSequence getValue() {
+ return value;
+ }
+
+ /**
+ * @return the begin
+ */
+ public int getBegin() {
+ return begin;
+ }
+
+ /**
+ * @return the end
+ */
+ public int getEnd() {
+ return end;
+ }
+
+ @Override
+ public String toString() {
+ return value + ", " + begin + ", " + end;
+ }
+ }
+
+ private List<QueryText> values = null;
+
+ /**
+ * @param pathElements
+ * - List of QueryText objects
+ */
+ public PathQueryNode(List<QueryText> pathElements) {
+ this.values = pathElements;
+ if (pathElements.size() <= 1) {
+ // this should not happen
+ throw new RuntimeException(
+ "PathQuerynode requires more 2 or more path elements.");
+ }
+ }
+
+ /**
+ * Returns the a List with all QueryText elements
+ *
+ * @return QueryText List size
+ */
+ public List<QueryText> getPathElements() {
+ return values;
+ }
+
+ /**
+ * Returns the a List with all QueryText elements
+ */
+ public void setPathElements(List<QueryText> elements) {
+ this.values = elements;
+ }
+
+ /**
+ * Returns the a specific QueryText element
+ *
+ * @return QueryText List size
+ */
+ public QueryText getPathElement(int index) {
+ return values.get(index);
+ }
+
+ /**
+ * Returns the CharSequence value of a specific QueryText element
+ *
+ * @return the CharSequence for a specific QueryText element
+ */
+ public CharSequence getFirstPathElement() {
+ return values.get(0).value;
+ }
+
+ /**
+ * Returns a List QueryText element from position startIndex
+ *
+ * @return a List QueryText element from position startIndex
+ */
+ public List<QueryText> getPathElements(int startIndex) {
+ List<PathQueryNode.QueryText> rValues = new ArrayList<PathQueryNode.QueryText>();
+ for (int i = startIndex; i < this.values.size(); i++) {
+ try {
+ rValues.add(this.values.get(i).clone());
+ } catch (CloneNotSupportedException e) {
+ // this will not happen
+ }
+ }
+ return rValues;
+ }
+
+ private CharSequence getPathString() {
+ StringBuilder path = new StringBuilder();
+
+ for (QueryText pathelement : values) {
+ path.append("/").append(pathelement.value);
+ }
+ return path.toString();
+ }
+
+ public CharSequence toQueryString(EscapeQuerySyntax escaper) {
+ StringBuilder path = new StringBuilder();
+ path.append("/").append(getFirstPathElement());
+
+ for (QueryText pathelement : getPathElements(1)) {
+ CharSequence value = escaper.escape(pathelement.value, Locale
+ .getDefault(), Type.STRING);
+ path.append("/\"").append(value).append("\"");
+ }
+ return path.toString();
+ }
+
+ @Override
+ public String toString() {
+ QueryText text = this.values.get(0);
+
+ return "<path start='" + text.begin + "' end='" + text.end + "' path='"
+ + getPathString() + "'/>";
+ }
+
+ @Override
+ public QueryNode cloneTree() throws CloneNotSupportedException {
+ PathQueryNode clone = (PathQueryNode) super.cloneTree();
+
+ // copy children
+ if (this.values != null) {
+ List<QueryText> localValues = new ArrayList<QueryText>();
+ for (QueryText value : this.values) {
+ localValues.add(value.clone());
+ }
+ clone.values = localValues;
+ }
+
+ return clone;
+ }
+
+}
fnp / pylucene.git / blobdiff