liquibase.serializer.core.string.StringChangeLogSerializer Maven / Gradle / Ivy
package liquibase.serializer.core.string;
import liquibase.changelog.ChangeSet;
import liquibase.exception.UnexpectedLiquibaseException;
import liquibase.serializer.ChangeLogSerializer;
import liquibase.serializer.LiquibaseSerializable;
import liquibase.util.StringUtils;
import java.io.File;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;
import java.io.OutputStream;
import java.io.IOException;
public class StringChangeLogSerializer implements ChangeLogSerializer {
private static final int INDENT_LENGTH = 4;
@Override
public String[] getValidFileExtensions() {
return new String[]{"txt"};
}
@Override
public String serialize(LiquibaseSerializable object, boolean pretty) {
return object.getSerializedObjectName() + ":" + serializeObject(object, 1);
}
private String serializeObject(LiquibaseSerializable objectToSerialize, int indent) {
try {
StringBuffer buffer = new StringBuffer();
buffer.append("[");
SortedSet values = new TreeSet();
for (String field : objectToSerialize.getSerializableFields()) {
Object value = objectToSerialize.getSerializableFieldValue(field);
if (value instanceof LiquibaseSerializable) {
values.add(indent(indent) + serializeObject((LiquibaseSerializable) value, indent + 1));
} else {
if (value != null) {
if (value instanceof Map) {
values.add(indent(indent) + field + "=" + serializeObject((Map) value, indent + 1));
} else if (value instanceof Collection) {
values.add(indent(indent) + field + "=" + serializeObject((Collection) value, indent + 1));
} else if (value instanceof Object[]) {
values.add(indent(indent) + field + "=" + serializeObject((Object[]) value, indent + 1));
} else {
String valueString = value.toString();
if (value instanceof Double || value instanceof Float) { //java 6 adds additional zeros to the end of doubles and floats
if (valueString.contains(".")) {
valueString = valueString.replaceFirst("0*$","");
}
}
values.add(indent(indent) + field + "=\"" + valueString + "\"");
}
}
}
}
if (values.size() > 0) {
buffer.append("\n");
buffer.append(StringUtils.join(values, "\n"));
buffer.append("\n");
}
buffer.append(indent(indent - 1)).append("]");
return buffer.toString().replace("\r\n", "\n").replace("\r", "\n"); //standardize all newline chars
} catch (Exception e) {
throw new UnexpectedLiquibaseException(e);
}
}
private String indent(int indent) {
return StringUtils.repeat(" ", INDENT_LENGTH * indent);
}
private String serializeObject(Object[] collection, int indent) {
if (collection.length == 0) {
return "[]";
}
String returnString = "[\n";
for (Object object : collection) {
if (object instanceof LiquibaseSerializable) {
returnString += indent(indent) + serializeObject((LiquibaseSerializable) object, indent + 1) + ",\n";
} else {
returnString += indent(indent) + object.toString() + ",\n";
}
}
returnString = returnString.replaceFirst(",$", "");
returnString += indent(indent - 1) + "]";
return returnString;
}
private String serializeObject(Collection collection, int indent) {
if (collection.size() == 0) {
return "[]";
}
String returnString = "[\n";
for (Object object : collection) {
if (object instanceof LiquibaseSerializable) {
returnString += indent(indent) + serializeObject((LiquibaseSerializable) object, indent + 1) + ",\n";
} else {
returnString += indent(indent) + object.toString() + ",\n";
}
}
returnString = returnString.replaceFirst(",$", "");
returnString += indent(indent - 1) + "]";
return returnString;
}
private String serializeObject(Map collection, int indent) {
if (collection.size() == 0) {
return "[]";
}
String returnString = "{\n";
for (Object key : new TreeSet(collection.keySet())) {
returnString += indent(indent) + key.toString() + "=\"" + collection.get(key) + "\",\n";
}
returnString = returnString.replaceFirst(",$", "");
returnString += indent(indent - 1) + "}";
return returnString;
}
@Override
public void write(List changeSets, OutputStream out) throws IOException {
}
@Override
public void append(ChangeSet changeSet, File changeLogFile) throws IOException {
}
}