/*
* Copyright 2011 JBoss, by Red Hat, Inc
*
* Licensed 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.jboss.errai.codegen.builder.callstack;
import org.jboss.errai.codegen.Context;
import org.jboss.errai.codegen.Statement;
import org.jboss.errai.codegen.VariableReference;
import org.jboss.errai.codegen.builder.impl.Scope;
import org.jboss.errai.codegen.exception.UndefinedFieldException;
import org.jboss.errai.codegen.meta.MetaClass;
import org.jboss.errai.codegen.meta.MetaClassFactory;
import org.jboss.errai.codegen.meta.MetaField;
import org.jboss.errai.codegen.meta.impl.build.BuildMetaField;
/**
* @author Mike Brock <cbrock@redhat.com>
*/
public class LoadField extends AbstractCallElement {
private final String fieldName;
public LoadField(final String fieldName) {
this.fieldName = fieldName;
}
@Override
public void handleCall(final CallWriter writer, final Context context, Statement statement) {
final MetaField field;
if (fieldName.equals("this")) {
// TODO this is a workaround to access the enclosing instance of a type
field = new BuildMetaField(null, null, Scope.Private, statement.getType(), "this");
}
else {
field = statement.getType().getInheritedField(fieldName);
}
if (field == null) {
final UndefinedFieldException ufe = new UndefinedFieldException(fieldName, statement.getType());
if (context.isPermissiveMode()) {
ufe.printStackTrace();
}
else {
blameAndRethrow(ufe);
}
}
final String currCallString = writer.getCallString();
writer.reset();
statement = new VariableReference() {
@Override
public String getName() {
return fieldName;
}
@Override
public Statement getValue() {
return null;
}
@Override
public String generate(final Context context) {
final StringBuilder buf = new StringBuilder(currCallString);
if (!currCallString.isEmpty()) {
buf.append(".");
}
return buf.append(getName()).toString();
}
@Override
public MetaClass getType() {
return field == null ? MetaClassFactory.get(Object.class) : field.getType();
}
};
nextOrReturn(writer, context, statement);
}
@Override
public String toString() {
return "[[LoadField<" + fieldName + ">]" + next + "]";
}
}