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/*
* Copyright 2014 James Moger.
*
* 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 com.iciql;
import com.iciql.Iciql.Mode;
import java.io.InputStream;
import java.util.Properties;
/**
* Loads DAO statements from Properties resource files the classpath.
*
* @author James Moger
*/
public class DaoClasspathStatementProvider implements DaoStatementProvider {
private final Properties externalStatements;
public DaoClasspathStatementProvider() {
externalStatements = load();
}
/**
* Returns the list of statement resources to try locating.
*
* @return
*/
protected String[] getStatementResources() {
return new String[]{"/iciql.properties", "/iciql.xml", "/conf/iciql.properties", "/conf/iciql.xml"};
}
/**
* Loads the first statement resource found on the classpath.
*
* @return the loaded statements
*/
private Properties load() {
Properties props = new Properties();
for (String resource : getStatementResources()) {
InputStream is = null;
try {
is = DaoProxy.class.getResourceAsStream(resource);
if (is != null) {
if (resource.toLowerCase().endsWith(".xml")) {
// load an .XML statements file
props.loadFromXML(is);
} else {
// load a .Properties statements file
props.load(is);
}
break;
}
} catch (Exception e) {
throw new IciqlException(e, "Failed to parse {0}", resource);
} finally {
try {
is.close();
} catch (Exception e) {
}
}
}
return props;
}
@Override
public String getStatement(String idOrStatement, Mode mode) {
final String modePrefix = "%" + mode.name().toLowerCase() + ".";
String value = externalStatements.getProperty(idOrStatement, idOrStatement);
value = externalStatements.getProperty(modePrefix + idOrStatement, value);
return value;
}
}
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