org.springframework.data.gemfire.mapping.PdxReaderPropertyAccessor Maven / Gradle / Ivy
/*
* Copyright 2012-2020 the original author or authors.
*
* 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
*
* https://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.springframework.data.gemfire.mapping;
import org.apache.geode.pdx.PdxReader;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.PropertyAccessor;
import org.springframework.expression.TypedValue;
/**
* {@link PropertyAccessor} to read values from a {@link PdxReader}.
*
* @author Oliver Gierke
*/
enum PdxReaderPropertyAccessor implements PropertyAccessor {
INSTANCE;
/*
* (non-Javadoc)
* @see org.springframework.expression.PropertyAccessor#getSpecificTargetClasses()
*/
@Override
public Class[] getSpecificTargetClasses() {
return new Class[] { PdxReader.class };
}
/*
* (non-Javadoc)
* @see org.springframework.expression.PropertyAccessor#canRead(org.springframework.expression.EvaluationContext, java.lang.Object, java.lang.String)
*/
@Override
public boolean canRead(EvaluationContext context, Object target, String name) {
return ((PdxReader) target).hasField(name);
}
/*
* (non-Javadoc)
* @see org.springframework.expression.PropertyAccessor#read(org.springframework.expression.EvaluationContext, java.lang.Object, java.lang.String)
*/
@Override
public TypedValue read(EvaluationContext context, Object target, String name) {
Object object = ((PdxReader) target).readObject(name);
return object == null ? TypedValue.NULL : new TypedValue(object);
}
/*
* (non-Javadoc)
* @see org.springframework.expression.PropertyAccessor#canWrite(org.springframework.expression.EvaluationContext, java.lang.Object, java.lang.String)
*/
@Override
public boolean canWrite(EvaluationContext context, Object target, String name) {
return false;
}
/*
* (non-Javadoc)
* @see org.springframework.expression.PropertyAccessor#write(org.springframework.expression.EvaluationContext, java.lang.Object, java.lang.String, java.lang.Object)
*/
@Override
public void write(EvaluationContext context, Object target, String name, Object newValue) {
throw new UnsupportedOperationException();
}
}