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MapFieldSet.java
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MapFieldSet.java
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/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and/or its affiliates, and individual
* contributors by the @authors tag. See the copyright.txt in the
* distribution for a full listing of individual contributors.
*
* 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.seam.config.xml.fieldset;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.SortedMap;
import java.util.TreeMap;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.BeanManager;
import org.jboss.seam.config.xml.model.EntryXmlItem;
import org.jboss.seam.config.xml.util.TypeReader;
import org.jboss.seam.solder.properties.Property;
/**
* class responsible for setting the value of map properties.
*
* @author Stuart Douglas <stuart@baileyroberts.com.au>
*/
public class MapFieldSet implements FieldValueObject {
private final Property<Object> field;
private final List<Entry<FieldValue, FieldValue>> values;
private final Class<?> keyType;
private final Class<?> valueType;
private final Class<? extends Map> collectionType;
public MapFieldSet(Property<Object> field, List<EntryXmlItem> items) {
this.field = field;
this.values = new ArrayList<Entry<FieldValue, FieldValue>>();
// figure out the collection type
Type type = field.getBaseType();
if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
if (parameterizedType.getRawType() == Map.class) {
collectionType = LinkedHashMap.class;
} else if (parameterizedType.getRawType() == LinkedHashMap.class) {
collectionType = LinkedHashMap.class;
} else if (parameterizedType.getRawType() == HashMap.class) {
collectionType = HashMap.class;
} else if (parameterizedType.getRawType() == SortedMap.class) {
collectionType = TreeMap.class;
} else if (parameterizedType.getRawType() == TreeMap.class) {
collectionType = TreeMap.class;
} else {
throw new RuntimeException("Could not determine element type for map " + field.getDeclaringClass().getName() + "." + field.getName());
}
keyType = TypeReader.readClassFromType(parameterizedType.getActualTypeArguments()[0]);
valueType = TypeReader.readClassFromType(parameterizedType.getActualTypeArguments()[1]);
} else if (type == Properties.class) {
collectionType = Properties.class;
keyType = TypeReader.readClassFromType(String.class);
valueType = TypeReader.readClassFromType(String.class);
} else {
throw new RuntimeException("Could not determine element type for map " + field.getDeclaringClass().getName() + "." + field.getName());
}
for (EntryXmlItem i : items) {
values.add(new EntryImpl(i.getKey().getValue(), i.getValue().getValue()));
}
}
public void setValue(Object instance, CreationalContext<?> ctx, BeanManager manager) {
try {
Map res = collectionType.newInstance();
field.setValue(instance, res);
for (int i = 0; i < values.size(); ++i) {
Entry<FieldValue, FieldValue> e = values.get(i);
res.put(e.getKey().value(keyType, ctx, manager), e.getValue().value(valueType, ctx, manager));
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private final class EntryImpl implements Entry<FieldValue, FieldValue> {
private FieldValue key;
private FieldValue value;
public EntryImpl(FieldValue key, FieldValue value) {
this.key = key;
this.value = value;
}
public FieldValue getKey() {
return key;
}
public FieldValue getValue() {
return value;
}
public FieldValue setValue(FieldValue value) {
return this.value = value;
}
public void setKey(FieldValue key) {
this.key = key;
}
}
}