enterprises.orbital.evekit.model.AttributeSelector Maven / Gradle / Ivy
package enterprises.orbital.evekit.model;
import java.util.HashSet;
import java.util.Set;
import com.google.gson.Gson;
/**
* Model data attribute selector. Precedence works as follows:
*
* - If any == true, then all other values are ignored and this becomes a wildcard selector.
*
- If any == false and like != null, then all other values are ignored and this becomes a like selector.
*
- If any == false and like == null and !value.isEmpty(), then all other values are ignored and this becomes a set selector.
*
- If any == false and like == null and value.isEmpty() and start != null and end != null, then this becomes a range selector.
*
- Otherwise, this becomes a wildcard selector.
*
*/
public class AttributeSelector {
public static enum SelectorType {
WILDCARD,
SET,
RANGE,
LIKE;
}
public static interface EnumMapper> {
public A mapEnumValue(
String value);
}
/**
* If true, allow any value for the attribute associated with this selector.
*/
public boolean any;
/**
* If not-null, make this a string based "like" selector. Ignored for non-string attributes.
*/
public String like;
/**
* If non-empty, only select elements in which the attribute has a value which is a member of the given set. Attributes are converted to the appropriate type
* (an error is thrown if the conversion fails).
*/
public Set values = new HashSet();
/**
* The lower bound of a range selector.
*/
public String start;
/**
* The upper bound of a range selector.
*/
public String end;
@SuppressWarnings("unused")
private AttributeSelector() {}
public AttributeSelector(String json) {
Gson gson = new Gson();
AttributeSelector convert = gson.fromJson(json, AttributeSelector.class);
copy(convert);
}
public void copy(
AttributeSelector other) {
this.any = other.any;
this.like = other.like;
this.values.addAll(other.values);
this.start = other.start;
this.end = other.end;
}
public SelectorType type() {
if (any) return SelectorType.WILDCARD;
if (like != null) return SelectorType.LIKE;
if (!values.isEmpty()) return SelectorType.SET;
if (start != null && end != null) return SelectorType.RANGE;
return SelectorType.WILDCARD;
}
public String getLikeValue() {
return like;
}
public Set getStringValues() {
return values;
}
public Set getLongValues() {
Set result = new HashSet();
for (String next : values) {
result.add(Long.parseLong(next));
}
return result;
}
public Set getIntValues() {
Set result = new HashSet();
for (String next : values) {
result.add(Integer.parseInt(next));
}
return result;
}
public Set getDoubleValues() {
Set result = new HashSet();
for (String next : values) {
result.add(Double.parseDouble(next));
}
return result;
}
public String getStringStart() {
return start;
}
public String getStringEnd() {
return end;
}
public long getLongStart() {
return Long.parseLong(start);
}
public long getLongEnd() {
return Long.parseLong(end);
}
public int getIntStart() {
return Integer.parseInt(start);
}
public int getIntEnd() {
return Integer.parseInt(end);
}
public double getDoubleStart() {
return Double.parseDouble(start);
}
public double getDoubleEnd() {
return Double.parseDouble(end);
}
public static void addLifelineSelector(
StringBuilder builder,
String target,
AttributeSelector at) {
switch (at.type()) {
case SET:
// Return items which were live at the given selected points in time
builder.append(" AND (");
for (long l : at.getLongValues()) {
builder.append("(").append(target).append(".lifeStart <= ").append(l).append(" AND ").append(target).append(".lifeEnd > ").append(l).append(") OR");
}
builder.setLength(builder.length() - 3);
builder.append(")");
break;
case RANGE:
// Fetch all values live in the given range
// lifeStart <= max and lifeEnd > min
long max = at.getLongEnd();
long min = at.getLongStart();
builder.append(" AND ").append(target).append(".lifeStart <= ").append(max);
builder.append(" AND ").append(target).append(".lifeEnd > ").append(min);
break;
case WILDCARD:
case LIKE:
default:
// No constraint, skip
break;
}
}
public static void addIntSelector(
StringBuilder builder,
String target,
String column,
AttributeSelector as) {
switch (as.type()) {
case SET:
builder.append(" AND ").append(target).append(".").append(column).append(" IN (");
for (int l : as.getIntValues()) {
builder.append(l).append(", ");
}
builder.setLength(builder.length() - 2);
builder.append(")");
break;
case RANGE:
builder.append(" AND ").append(target).append(".").append(column).append(" >= ").append(as.getIntStart()).append(" AND ").append(target).append(".")
.append(column).append(" <= ").append(as.getIntEnd());
break;
case WILDCARD:
case LIKE:
default:
// No constraint, skip
break;
}
}
public static void addLongSelector(
StringBuilder builder,
String target,
String column,
AttributeSelector as) {
switch (as.type()) {
case SET:
builder.append(" AND ").append(target).append(".").append(column).append(" IN (");
for (long l : as.getLongValues()) {
builder.append(l).append(", ");
}
builder.setLength(builder.length() - 2);
builder.append(")");
break;
case RANGE:
builder.append(" AND ").append(target).append(".").append(column).append(" >= ").append(as.getLongStart()).append(" AND ").append(target).append(".")
.append(column).append(" <= ").append(as.getLongEnd());
break;
case WILDCARD:
case LIKE:
default:
// No constraint, skip
break;
}
}
public static void addDoubleSelector(
StringBuilder builder,
String target,
String column,
AttributeSelector as) {
switch (as.type()) {
case SET:
builder.append(" AND ").append(target).append(".").append(column).append(" IN (");
for (double l : as.getDoubleValues()) {
builder.append(l).append(", ");
}
builder.setLength(builder.length() - 2);
builder.append(")");
break;
case RANGE:
builder.append(" AND ").append(target).append(".").append(column).append(" >= ").append(as.getDoubleStart()).append(" AND ").append(target).append(".")
.append(column).append(" <= ").append(as.getDoubleEnd());
break;
case WILDCARD:
case LIKE:
default:
// No constraint, skip
break;
}
}
public static void addStringSelector(
StringBuilder builder,
String target,
String column,
AttributeSelector as,
AttributeParameters p) {
switch (as.type()) {
case SET:
builder.append(" AND ").append(target).append(".").append(column).append(" IN (");
for (String l : as.getStringValues()) {
String next = ":" + p.addStringParam(l);
builder.append(next).append(", ");
}
builder.setLength(builder.length() - 2);
builder.append(")");
break;
case RANGE:
String minParam = ":" + p.addStringParam(as.getStringStart());
String maxParam = ":" + p.addStringParam(as.getStringEnd());
builder.append(" AND ").append(target).append(".").append(column).append(" >= ").append(minParam).append(" AND ").append(target).append(".")
.append(column).append(" <= ").append(maxParam);
break;
case LIKE:
// Like clause. Attribute should contain any needed wildcards.
String likeParam = ":" + p.addStringParam(as.getLikeValue());
builder.append(" AND ").append(target).append(".").append(column).append(" LIKE ").append(likeParam);
break;
case WILDCARD:
default:
// No constraint, skip
break;
}
}
public static > void addEnumSelector(
StringBuilder builder,
String target,
String column,
AttributeSelector as,
EnumMapper mapper,
AttributeParameters p) {
switch (as.type()) {
case SET:
builder.append(" AND ").append(target).append(".").append(column).append(" IN (");
for (String l : as.getStringValues()) {
String next = ":" + p.addEnumParam(mapper.mapEnumValue(l));
builder.append(next).append(", ");
}
builder.setLength(builder.length() - 2);
builder.append(")");
break;
case RANGE:
case LIKE:
case WILDCARD:
default:
// No constraint, skip
break;
}
}
public static void addBooleanSelector(
StringBuilder builder,
String target,
String column,
AttributeSelector as) {
switch (as.type()) {
case SET:
// Only take the first value in the set (according to the iterator). This value determines the value for comparison.
boolean value = Boolean.valueOf(as.getStringValues().iterator().next());
builder.append(" AND ").append(target).append(".").append(column).append(" = ").append(value);
break;
case RANGE:
case LIKE:
case WILDCARD:
default:
// No constraint, skip
break;
}
}
public static void addSetLongSelector(
StringBuilder builder,
String target,
String column,
AttributeSelector as) {
switch (as.type()) {
case SET:
// Check that at least one set member is a member of the long valued target collection
builder.append(" AND SOME ELEMENTS(").append(target).append(".").append(column).append(") IN (");
for (long next : as.getLongValues()) {
builder.append(next).append(", ");
}
builder.setLength(builder.length() - 2);
builder.append(")");
break;
case RANGE:
// Check that some of the elements of the set are within the range.
long min = as.getLongStart();
long max = as.getLongEnd();
builder.append(" AND SOME ELEMENTS(").append(target).append(".").append(column).append(") BETWEEN ").append(min).append(" AND ").append(max);
break;
case LIKE:
case WILDCARD:
default:
// No constraint, skip
break;
}
}
}
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