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* 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
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package org.apache.cayenne.exp.parser;
import java.io.IOException;
import java.util.List;
import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.DataObject;
import org.apache.cayenne.exp.Expression;
import org.apache.cayenne.map.Entity;
import org.apache.cayenne.map.ObjEntity;
import org.apache.cayenne.reflect.PropertyUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ASTObjPath extends ASTPath {
private static final long serialVersionUID = -3574281576491705706L;
private static final Logger LOGGER = LoggerFactory.getLogger(ASTObjPath.class);
public static final String OBJ_PREFIX = "obj:";
/**
* Constructor used by expression parser. Do not invoke directly.
*/
ASTObjPath(int id) {
super(id);
}
public ASTObjPath() {
super(ExpressionParserTreeConstants.JJTOBJPATH);
}
public ASTObjPath(Object value) {
super(ExpressionParserTreeConstants.JJTOBJPATH);
setPath(value);
}
@Override
protected Object evaluateNode(Object o) throws Exception {
return (o instanceof DataObject) ? ((DataObject) o).readNestedProperty(path)
: (o instanceof Entity) ? evaluateEntityNode((Entity) o) : PropertyUtils.getProperty(o, path);
}
/**
* Creates a copy of this expression node, without copying children.
*/
@Override
public Expression shallowCopy() {
ASTObjPath copy = new ASTObjPath(id);
copy.path = path;
return copy;
}
/**
* @since 4.0
*/
@Override
public void appendAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId) throws IOException {
out.append(rootId);
out.append('.');
out.append(path);
}
/**
* @since 4.0
*/
@Override
public void appendAsString(Appendable out) throws IOException {
out.append(path);
}
@Override
public int getType() {
return Expression.OBJ_PATH;
}
void injectValue(Object source, Object value) {
if (!getPath().contains(ObjEntity.PATH_SEPARATOR)) {
try {
if (source instanceof DataObject) {
((DataObject) source).writeProperty(getPath(), value);
} else {
PropertyUtils.setProperty(source, getPath(), value);
}
} catch (CayenneRuntimeException ex) {
LOGGER.warn("Failed to inject value " + value + " on path " + getPath() + " to " + source, ex);
}
}
}
}