package org.apache.ibatis.builder.xml.dynamic;
import org.apache.ibatis.ognl.OgnlException;
import org.apache.ibatis.ognl.OgnlRuntime;
import org.apache.ibatis.ognl.PropertyAccessor;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.session.Configuration;
import java.util.HashMap;
import java.util.Map;
public class DynamicContext {
public static final String PARAMETER_OBJECT_KEY = "_parameter";
static {
OgnlRuntime.setPropertyAccessor(ContextMap.class, new ContextAccessor());
}
private final ContextMap bindings = new ContextMap();
private final StringBuilder sqlBuilder = new StringBuilder();
private int uniqueNumber = 0;
public DynamicContext(Configuration configuration, Object parameterObject) {
if (parameterObject != null && !(parameterObject instanceof Map)) {
MetaObject metaObject = configuration.newMetaObject(parameterObject);
String[] names = metaObject.getGetterNames();
for (String name : names) {
bindings.put(name, metaObject.getValue(name));
}
}
bindings.put(PARAMETER_OBJECT_KEY, parameterObject);
}
public Map<String, Object> getBindings() {
return bindings;
}
public void bind(String name, Object value) {
bindings.put(name, value);
}
public void appendSql(String sql) {
sqlBuilder.append(sql);
sqlBuilder.append(" ");
}
public String getSql() {
return sqlBuilder.toString().trim();
}
public int getUniqueNumber() {
return uniqueNumber++;
}
static class ContextMap extends HashMap<String, Object> {
}
static class ContextAccessor implements PropertyAccessor {
public Object getProperty(Map context, Object target, Object name)
throws OgnlException {
Map map = (Map) target;
Object result = map.get(name);
if (result != null) {
return result;
}
Object parameterObject = map.get(PARAMETER_OBJECT_KEY);
if (parameterObject instanceof Map) {
return ((Map)parameterObject).get(name);
}
return null;
}
public void setProperty(Map context, Object target, Object name, Object value)
throws OgnlException {
Map map = (Map) target;
map.put(name, value);
}
}
}
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