package org.apache.ibatis.builder;
import org.apache.ibatis.mapping.ParameterMode;
import org.apache.ibatis.mapping.ResultSetType;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.TypeAliasRegistry;
import org.apache.ibatis.type.TypeHandlerRegistry;
public abstract class BaseBuilder {
protected final Configuration configuration;
protected final TypeAliasRegistry typeAliasRegistry;
protected final TypeHandlerRegistry typeHandlerRegistry;
public BaseBuilder(Configuration configuration) {
this.configuration = configuration;
this.typeAliasRegistry = this.configuration.getTypeAliasRegistry();
this.typeHandlerRegistry = this.configuration.getTypeHandlerRegistry();
}
public Configuration getConfiguration() {
return configuration;
}
protected String stringValueOf(String value, String defaultValue) {
return value == null ? defaultValue : value;
}
protected Boolean booleanValueOf(String value, Boolean defaultValue) {
return value == null ? defaultValue : Boolean.valueOf(value);
}
protected Integer integerValueOf(String value, Integer defaultValue) {
return value == null ? defaultValue : Integer.valueOf(value);
}
protected JdbcType resolveJdbcType(String alias) {
if (alias == null) return null;
try {
return JdbcType.valueOf(alias);
} catch (IllegalArgumentException e) {
throw new BuilderException("Error resolving JdbcType. Cause: " + e, e);
}
}
protected ResultSetType resolveResultSetType(String alias) {
if (alias == null) return null;
try {
return ResultSetType.valueOf(alias);
} catch (IllegalArgumentException e) {
throw new BuilderException("Error resolving ResultSetType. Cause: " + e, e);
}
}
protected ParameterMode resolveParameterMode(String alias) {
if (alias == null) return null;
try {
return ParameterMode.valueOf(alias);
} catch (IllegalArgumentException e) {
throw new BuilderException("Error resolving ParameterMode. Cause: " + e, e);
}
}
protected Class resolveClass(String alias) {
if (alias == null) return null;
try {
return resolveAlias(alias);
} catch (Exception e) {
throw new BuilderException("Error resolving class . Cause: " + e, e);
}
}
protected Object resolveInstance(String alias) {
if (alias == null) return null;
try {
Class type = resolveClass(alias);
return type.newInstance();
} catch (Exception e) {
throw new BuilderException("Error instantiating class. Cause: " + e, e);
}
}
protected Object resolveInstance(Class type) {
if (type == null) return null;
try {
return type.newInstance();
} catch (Exception e) {
throw new BuilderException("Error instantiating class. Cause: " + e, e);
}
}
protected Class resolveAlias(String alias) {
return typeAliasRegistry.resolveAlias(alias);
}
}
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