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The Adobe Experience Manager SDK
/*
* 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.
*/
package org.apache.jackrabbit.spi.commons.query;
import java.util.Arrays;
import javax.jcr.RepositoryException;
import org.apache.jackrabbit.spi.Name;
import org.apache.jackrabbit.spi.Path;
/**
* Utility class to dump a {@link QueryNode} tree to a StringBuffer.
*/
public class QueryTreeDump implements QueryNodeVisitor {
/**
* Current indentation level
*/
private int indent;
/**
* Padding array filled with spaces
*/
private static char[] PADDING = new char[255];
/**
* The padding character: whitespace.
*/
private static final char PADDING_CHAR = ' ';
static {
Arrays.fill(PADDING, PADDING_CHAR);
}
/**
* Dumps the node tree to buffer.
* @param node the root node.
* @param buffer where to dump the tree.
* @throws RepositoryException
*/
private QueryTreeDump(QueryNode node, StringBuffer buffer) throws RepositoryException {
node.accept(this, buffer);
}
/**
* Dumps a query node tree to the string buffer.
* @param node the root node of a query tree.
* @param buffer a string buffer where to dump the tree structure.
* @throws RepositoryException
*/
public static void dump(QueryNode node, StringBuffer buffer) throws RepositoryException {
new QueryTreeDump(node, buffer);
}
public Object visit(QueryRootNode node, Object data) throws RepositoryException {
StringBuffer buffer = (StringBuffer) data;
buffer.append("+ Root node");
buffer.append("\n");
// select properties
Name[] select = node.getSelectProperties();
buffer.append("+ Select properties: ");
if (select.length == 0) {
buffer.append("*");
} else {
String comma = "";
for (int i = 0; i < select.length; i++) {
buffer.append(comma);
buffer.append(select[i].toString());
comma = ", ";
}
}
buffer.append("\n");
// path
traverse(new QueryNode[]{node.getLocationNode()}, buffer);
// order by
OrderQueryNode order = node.getOrderNode();
if (order != null) {
traverse(new QueryNode[]{order}, buffer);
}
return buffer;
}
public Object visit(OrQueryNode node, Object data) throws RepositoryException {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ OrQueryNode");
buffer.append("\n");
traverse(node.getOperands(), buffer);
return buffer;
}
public Object visit(AndQueryNode node, Object data) throws RepositoryException {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ AndQueryNode");
buffer.append("\n");
traverse(node.getOperands(), buffer);
return buffer;
}
public Object visit(NotQueryNode node, Object data) throws RepositoryException {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ NotQueryNode");
buffer.append("\n");
traverse(node.getOperands(), buffer);
return buffer;
}
public Object visit(ExactQueryNode node, Object data) {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ ExactQueryNode: ");
buffer.append(" Prop=").append(node.getPropertyName());
buffer.append(" Value=").append(node.getValue());
buffer.append("\n");
return buffer;
}
public Object visit(NodeTypeQueryNode node, Object data) {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ NodeTypeQueryNode: ");
buffer.append(" Prop=").append(node.getPropertyName());
buffer.append(" Value=").append(node.getValue());
buffer.append("\n");
return buffer;
}
public Object visit(TextsearchQueryNode node, Object data) {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ TextsearchQueryNode: ");
buffer.append(" Path=");
Path relPath = node.getRelativePath();
if (relPath == null) {
buffer.append(".");
} else {
Path.Element[] elements = relPath.getElements();
String slash = "";
for (int i = 0; i < elements.length; i++) {
buffer.append(slash);
slash = "/";
if (node.getReferencesProperty() && i == elements.length - 1) {
buffer.append("@");
}
buffer.append(elements[i]);
}
}
buffer.append(" Query=").append(node.getQuery());
buffer.append("\n");
return buffer;
}
public Object visit(PathQueryNode node, Object data) throws RepositoryException {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ PathQueryNode");
buffer.append("\n");
traverse(node.getOperands(), buffer);
return buffer;
}
public Object visit(LocationStepQueryNode node, Object data) throws RepositoryException {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ LocationStepQueryNode: ");
buffer.append(" NodeTest=");
if (node.getNameTest() == null) {
buffer.append("*");
} else {
buffer.append(node.getNameTest());
}
buffer.append(" Descendants=").append(node.getIncludeDescendants());
buffer.append(" Index=");
if (node.getIndex() == LocationStepQueryNode.NONE) {
buffer.append("NONE");
} else if (node.getIndex() == LocationStepQueryNode.LAST) {
buffer.append("last()");
} else {
buffer.append(node.getIndex());
}
buffer.append("\n");
traverse(node.getOperands(), buffer);
return buffer;
}
public Object visit(RelationQueryNode node, Object data) throws RepositoryException {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ RelationQueryNode: Op: ");
buffer.append(QueryConstants.OPERATION_NAMES.getName(node.getOperation()));
buffer.append(" Prop=[");
PathQueryNode relPath = node.getRelativePath();
if (relPath == null) {
buffer.append(relPath);
} else {
visit(relPath, buffer);
}
buffer.append("] Type=").append(QueryConstants.TYPE_NAMES.getName(node.getValueType()));
if (node.getValueType() == QueryConstants.TYPE_DATE) {
buffer.append(" Value=").append(node.getDateValue());
} else if (node.getValueType() == QueryConstants.TYPE_DOUBLE) {
buffer.append(" Value=").append(node.getDoubleValue());
} else if (node.getValueType() == QueryConstants.TYPE_LONG) {
buffer.append(" Value=").append(node.getLongValue());
} else if (node.getValueType() == QueryConstants.TYPE_POSITION) {
buffer.append(" Value=").append(node.getPositionValue());
} else if (node.getValueType() == QueryConstants.TYPE_STRING) {
buffer.append(" Value=").append(node.getStringValue());
} else if (node.getValueType() == QueryConstants.TYPE_TIMESTAMP) {
buffer.append(" Value=").append(node.getDateValue());
}
buffer.append("\n");
traverse(node.getOperands(), buffer);
return buffer;
}
public Object visit(OrderQueryNode node, Object data) {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ OrderQueryNode");
buffer.append("\n");
OrderQueryNode.OrderSpec[] specs = node.getOrderSpecs();
for (int i = 0; i < specs.length; i++) {
buffer.append(PADDING, 0, indent);
buffer.append(" ");
appendPath(specs[i].getPropertyPath(), buffer);
buffer.append(" asc=").append(specs[i].isAscending());
buffer.append("\n");
}
return buffer;
}
public Object visit(DerefQueryNode node, Object data) throws RepositoryException {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ DerefQueryNode: ");
buffer.append(" NodeTest=");
if (node.getNameTest() == null) {
buffer.append("*");
} else {
buffer.append(node.getNameTest());
}
buffer.append(" Descendants=").append(node.getIncludeDescendants());
buffer.append(" Index=");
if (node.getIndex() == LocationStepQueryNode.NONE) {
buffer.append("NONE");
} else if (node.getIndex() == LocationStepQueryNode.LAST) {
buffer.append("last()");
} else {
buffer.append(node.getIndex());
}
buffer.append("\n");
traverse(node.getOperands(), buffer);
return buffer;
}
public Object visit(PropertyFunctionQueryNode node, Object data) {
StringBuffer buffer = (StringBuffer) data;
buffer.append(PADDING, 0, indent);
buffer.append("+ PropertyFunctionQueryNode: ");
buffer.append(node.getFunctionName());
buffer.append("()\n");
return buffer;
}
private void traverse(QueryNode[] node, StringBuffer buffer) throws RepositoryException {
indent += 2;
if (indent > PADDING.length) {
char[] tmp = new char[indent * 2];
Arrays.fill(tmp, PADDING_CHAR);
PADDING = tmp;
}
for (int i = 0; i < node.length; i++) {
node[i].accept(this, buffer);
}
indent -= 2;
}
/**
* Appends the relative path to the buffer using '/' as the
* delimiter for path elements.
*
* @param relPath a relative path.
* @param buffer the buffer where to append the path.
*/
private static void appendPath(Path relPath, StringBuffer buffer) {
Path.Element[] elements = relPath.getElements();
String slash = "";
for (int i = 0; i < elements.length; i++) {
buffer.append(slash);
slash = "/";
buffer.append(elements[i]);
}
}
}
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