/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.bridge.util.impl;
import java.util.ArrayList;
import org.apache.lucene.document.Document;
import org.hibernate.search.bridge.BridgeException;
import org.hibernate.search.bridge.FieldBridge;
import org.hibernate.search.bridge.LuceneOptions;
import org.hibernate.search.bridge.StringBridge;
import org.hibernate.search.bridge.TwoWayFieldBridge;
import org.hibernate.search.bridge.spi.ConversionContext;
/**
* Wrap the exception with an exception provide contextual feedback.
* This class is designed to be reused, but is not threadsafe.
*
* @author Emmanuel Bernard
* @author Sanne Grinovero
* @author Hardy Ferentschik
*/
public final class ContextualExceptionBridgeHelper implements ConversionContext {
private static final String IDENTIFIER = "identifier";
// Mutable state:
private Class<?> clazz;
private StringBridge stringBridge;
private FieldBridge oneWayBridge;
private TwoWayFieldBridge twoWayBridge;
//Reused helpers:
private final ArrayList<String> path = new ArrayList<String>( 5 ); //half of usual increment size as I don't expect much
private final OneWayConversionContextImpl oneWayAdapter = new OneWayConversionContextImpl();
private final TwoWayConversionContextImpl twoWayAdapter = new TwoWayConversionContextImpl();
private final StringConversionContextImpl stringAdapter = new StringConversionContextImpl();
@Override
public ConversionContext setClass(Class<?> clazz) {
this.clazz = clazz;
return this;
}
@Override
public ConversionContext pushProperty(String property) {
path.add( property );
return this;
}
@Override
public ConversionContext popProperty() {
if ( path.size() == 0 ) {
throw new IllegalStateException( "Trying to pop a property from an empty conversion context" );
}
path.remove( path.size() - 1 );
return this;
}
@Override
public ConversionContext pushIdentifierProperty() {
pushProperty( IDENTIFIER );
return this;
}
protected BridgeException buildBridgeException(Exception e, String method) {
StringBuilder error = new StringBuilder( "Exception while calling bridge#" ).append( method );
if ( clazz != null ) {
error.append( "\n\tclass: " ).append( clazz.getName() );
}
if ( path.size() > 0 ) {
error.append( "\n\tpath: " );
for ( String pathNode : path ) {
error.append( pathNode ).append( "." );
}
error.deleteCharAt( error.length() - 1 );
}
throw new BridgeException( error.toString(), e );
}
@Override
public FieldBridge oneWayConversionContext(FieldBridge delegate) {
this.oneWayBridge = delegate;
return oneWayAdapter;
}
@Override
public TwoWayFieldBridge twoWayConversionContext(TwoWayFieldBridge delegate) {
this.twoWayBridge = delegate;
return twoWayAdapter;
}
@Override
public StringBridge stringConversionContext(StringBridge delegate) {
this.stringBridge = delegate;
return stringAdapter;
}
private final class OneWayConversionContextImpl implements FieldBridge {
@Override
public void set(String name, Object value, Document document, LuceneOptions luceneOptions) {
try {
oneWayBridge.set( name, value, document, luceneOptions );
}
catch (RuntimeException e) {
throw buildBridgeException( e, "set" );
}
}
}
private final class TwoWayConversionContextImpl implements TwoWayFieldBridge {
@Override
public Object get(String name, Document document) {
try {
return twoWayBridge.get( name, document );
}
catch (RuntimeException e) {
throw buildBridgeException( e, "get" );
}
}
@Override
public String objectToString(Object object) {
try {
return twoWayBridge.objectToString( object );
}
catch (RuntimeException e) {
throw buildBridgeException( e, "objectToString" );
}
}
@Override
public void set(String name, Object value, Document document, LuceneOptions luceneOptions) {
try {
twoWayBridge.set( name, value, document, luceneOptions );
}
catch (RuntimeException e) {
throw buildBridgeException( e, "set" );
}
}
}
private final class StringConversionContextImpl implements StringBridge {
@Override
public String objectToString(Object object) {
try {
return stringBridge.objectToString( object );
}
catch (RuntimeException e) {
throw buildBridgeException( e, "objectToString" );
}
}
}
}