com.atlassian.bamboo.specs.codegen.emitters.CodeGenerationUtils Maven / Gradle / Ivy
package com.atlassian.bamboo.specs.codegen.emitters;
import com.atlassian.bamboo.specs.api.codegen.CodeEmitter;
import com.atlassian.bamboo.specs.api.codegen.CodeGenerationContext;
import com.atlassian.bamboo.specs.api.codegen.CodeGenerationException;
import com.atlassian.bamboo.specs.api.codegen.annotations.CodeGenerator;
import com.atlassian.bamboo.specs.api.codegen.annotations.CodeGeneratorName;
import org.apache.commons.lang3.StringUtils;
import java.lang.reflect.AnnotatedElement;
import java.util.List;
import java.util.Map;
import java.util.Set;
public final class CodeGenerationUtils {
private CodeGenerationUtils() {
}
/**
* Generates comma separated list of items.
*/
public static void appendCommaSeparatedList(CodeGenerationContext context,
StringBuilder builder,
List valuesAndFails,
Set indicesOfFails) {
for (int i = 0; i < valuesAndFails.size(); i++) {
String valueOrFail = valuesAndFails.get(i);
boolean isFail = indicesOfFails.contains(i);
if (isFail) {
builder.append("//").append(valueOrFail).append(context.newLine());
} else {
if (StringUtils.isNotEmpty(valueOrFail)) {
builder.append(valueOrFail);
if (hasMoreValuesToAppend(i, valuesAndFails, indicesOfFails)) {
builder.append(",");
if (i < valuesAndFails.size() - 1) {
builder.append(context.newLine());
}
}
}
}
}
}
private static boolean hasMoreValuesToAppend(final int i, final List valuesAndFails, Set indicesOfFails) {
for (int j = i + 1; j < valuesAndFails.size(); j++) {
if (StringUtils.isNotEmpty(valuesAndFails.get(j)) && !indicesOfFails.contains(j)) {
return true;
}
}
return false;
}
/**
* Checks if value is empty. Object is empty if it is null, is a blank string or an empty collection.
*/
public static boolean isEmptyField(final Object fieldValue) {
if (fieldValue == null) {
return true;
} else if (fieldValue instanceof String) {
return StringUtils.isBlank((String) fieldValue);
} else if (fieldValue instanceof Iterable) {
return !((Iterable) fieldValue).iterator().hasNext();
} else if (fieldValue instanceof Map) {
return ((Map) fieldValue).isEmpty();
}
return false;
}
/**
* Checks if a field or class has a code generator specified by an annotation.
*
* @return instance of code generator or null if no annotation is present.
*/
public static CodeEmitter findEmitterByAnnotation(final AnnotatedElement annotatedElement) throws CodeGenerationException {
if (annotatedElement.isAnnotationPresent(CodeGenerator.class)) {
final Class> emitterClass = ((CodeGenerator) annotatedElement.getAnnotation(CodeGenerator.class)).value();
try {
return (CodeEmitter) emitterClass.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
throw new CodeGenerationException("Could not instantiate emitter class " + emitterClass.getCanonicalName(), e);
}
}
if (annotatedElement.isAnnotationPresent(CodeGeneratorName.class)) {
final String emitterClassName = annotatedElement.getAnnotation(CodeGeneratorName.class).value();
try {
final Class emitterClass = Class.forName(emitterClassName);
return (CodeEmitter) emitterClass.newInstance();
} catch (final Exception e) {
throw new CodeGenerationException("Could not instantiate emitter class " + emitterClassName, e);
}
}
return null;
}
}