/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.dom;
import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.util.ArrayList;
import org.pentaho.reporting.engine.classic.core.AttributeNames;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.ReportElement;
import org.pentaho.reporting.engine.classic.core.Section;
import org.pentaho.reporting.engine.classic.core.metadata.ElementMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ElementType;
public class ReportStructureMatcher {
private static class NodeIterator {
private boolean singleResult;
private ArrayList<ReportElement> nodes;
private NodeMatcher matcher;
private MatcherContext context;
private NodeIterator() {
nodes = new ArrayList<ReportElement>();
}
public ReportElement get( final MatcherContext context, final ReportElement node, final NodeMatcher matcher ) {
if ( node == null ) {
throw new NullPointerException();
}
if ( matcher == null ) {
throw new NullPointerException();
}
this.context = context;
this.matcher = matcher;
this.nodes.clear();
this.singleResult = true;
startProcessing( node, true );
if ( this.nodes.isEmpty() ) {
return null;
}
return this.nodes.get( 0 );
}
private void startProcessing( final ReportElement node, final boolean first ) {
if ( node instanceof Section ) {
final Section s = (Section) node;
if ( first == true || startBox( node ) ) {
final int elementCount = s.getElementCount();
for ( int i = 0; i < elementCount; i += 1 ) {
startProcessing( s.getElement( i ), false );
}
}
} else {
processOtherNode( node );
}
}
public ReportElement[] getAll( final MatcherContext context, final ReportElement node, final NodeMatcher matcher ) {
if ( node == null ) {
throw new NullPointerException();
}
if ( matcher == null ) {
throw new NullPointerException();
}
this.context = context;
this.matcher = matcher;
this.nodes.clear();
this.singleResult = false;
startProcessing( node, true );
return this.nodes.toArray( new ReportElement[this.nodes.size()] );
}
protected boolean startBox( final ReportElement box ) {
if ( singleResult && nodes.isEmpty() == false ) {
return false;
}
if ( context.isMatchSubReportChilds() == false ) {
if ( box.getMetaData().getReportElementType() == ElementMetaData.TypeClassification.SUBREPORT ) {
return false;
}
}
if ( matcher.matches( context, box ) ) {
nodes.add( box );
if ( singleResult ) {
return false;
}
}
return true;
}
protected void processOtherNode( final ReportElement node ) {
if ( singleResult && nodes.isEmpty() == false ) {
return;
}
if ( matcher.matches( context, node ) ) {
nodes.add( node );
}
}
}
public enum Type {
Start, Descendant, Child, Id, Class, Element
}
private static ElementMatcher createMatcher( final StreamTokenizer tokenizer ) {
if ( tokenizer.ttype == '*' ) {
return new AnyNodeMatcher();
}
return new ElementMatcher( tokenizer.sval );
}
public static NodeMatcher parse( final String s ) throws IOException {
final StreamTokenizer tokenizer = new StreamTokenizer( new StringReader( s ) );
tokenizer.wordChars( '0', '9' );
tokenizer.ordinaryChar( '.' );
tokenizer.ordinaryChar( ',' );
tokenizer.ordinaryChars( 0, ' ' );
ElementMatcher elementMatcher = null;
NodeMatcher n = null;
Type selectorType = Type.Start;
int token;
while ( ( token = tokenizer.nextToken() ) != StreamTokenizer.TT_EOF ) {
if ( token == StreamTokenizer.TT_WORD || token == '*' ) {
NodeMatcher matcher = null;
switch ( selectorType ) {
case Start:
elementMatcher = createMatcher( tokenizer );
matcher = elementMatcher;
break;
case Child:
n = new ChildMatcher( n );
elementMatcher = createMatcher( tokenizer );
matcher = elementMatcher;
break;
case Descendant:
n = new DescendantMatcher( n );
elementMatcher = createMatcher( tokenizer );
matcher = elementMatcher;
break;
case Id:
if ( elementMatcher == null ) {
if ( n != null ) {
n = new DescendantMatcher( n );
}
elementMatcher = createMatcher( tokenizer );
matcher = elementMatcher;
}
elementMatcher.add( new AttributeMatcher( AttributeNames.Xml.NAMESPACE, AttributeNames.Xml.ID,
tokenizer.sval ) );
break;
case Class:
if ( elementMatcher == null ) {
if ( n != null ) {
n = new DescendantMatcher( n );
}
elementMatcher = createMatcher( tokenizer );
matcher = elementMatcher;
}
elementMatcher.add( new AttributeMatcher( AttributeNames.Core.NAMESPACE, AttributeNames.Core.STYLE_CLASS,
tokenizer.sval ) );
break;
default:
throw new IOException();
}
selectorType = Type.Element;
if ( matcher != null ) {
if ( n != null ) {
n = new AndMatcher( matcher, n );
} else {
n = matcher;
}
}
} else {
if ( token == '>' ) {
selectorType = Type.Child;
}
if ( token == '.' ) {
selectorType = Type.Class;
}
if ( token == '#' ) {
selectorType = Type.Id;
}
if ( Character.isWhitespace( token ) ) {
if ( selectorType == Type.Class || selectorType == Type.Id ) {
throw new IllegalStateException();
}
if ( selectorType != Type.Child ) {
selectorType = Type.Descendant;
}
}
}
}
return n;
}
public static ReportElement match( final MatcherContext context, final ReportElement base, final NodeMatcher parse ) {
if ( parse == null ) {
throw new NullPointerException();
}
context.setSingleSelectionHint( true );
return new NodeIterator().get( context, base, parse );
}
public static ReportElement[] matchAll( final MatcherContext context, final ReportElement base,
final NodeMatcher parse ) {
if ( parse == null ) {
throw new NullPointerException();
}
context.setSingleSelectionHint( false );
return new NodeIterator().getAll( context, base, parse );
}
public static ReportElement match( final MatcherContext context, final ReportElement base, final String selector )
throws IOException {
final NodeMatcher parse = parse( selector );
return match( context, base, parse );
}
public static ReportElement[]
matchAll( final MatcherContext context, final ReportElement base, final String selector ) throws IOException {
final NodeMatcher parse = parse( selector );
return matchAll( context, base, parse );
}
public static ReportElement[] findElementsByName( final ReportElement section, final String name ) {
return findElementsByAttribute( section, AttributeNames.Core.NAMESPACE, AttributeNames.Core.NAME, name );
}
public static ReportElement[]
findElementsByAttribute( final ReportElement section, final String ns, final String name ) {
return findElementsByAttribute( section, ns, name, null );
}
public static ReportElement[] findElementsByAttribute( final ReportElement section, final String ns,
final String name, final Object value ) {
final MatcherContext context = new MatcherContext();
context.setMatchSubReportChilds( false );
return matchAll( context, section, new AttributeMatcher( ns, name, value ) );
}
public static ReportElement[] findElementsByType( final ReportElement section, final ElementType type ) {
final MatcherContext context = new MatcherContext();
context.setMatchSubReportChilds( false );
final String name = type.getMetaData().getName();
return matchAll( context, section, new ElementMatcher( name ) );
}
public static ReportElement findElementByType( final Element element, final ElementType type ) {
final MatcherContext context = new MatcherContext();
context.setMatchSubReportChilds( false );
final String name = type.getMetaData().getName();
return match( context, element, new ElementMatcher( name ) );
}
}