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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document;
import com.yahoo.document.datatypes.FieldValue;
import com.yahoo.document.datatypes.StructuredFieldValue;
import com.yahoo.vespa.objects.Ids;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* @author Håkon Humberset
*/
public abstract class StructuredDataType extends DataType {
public static final int classId = registerClass(Ids.document + 56, StructuredDataType.class);
protected static int createId(String name) {
if (name.equals("document")) return 8;
// This is broken really because we now depend on String.hashCode staying the same in Java vm's
// which is likely for pragmatic reasons but not by contract
return (name+".0").hashCode(); // the ".0" must be preserved to keep hashCodes the same after we removed version
}
public StructuredDataType(String name) {
super(name, createId(name));
}
public StructuredDataType(int id, String name) {
super(name, id);
}
@Override
public abstract StructuredFieldValue createFieldValue();
@Override
protected FieldValue createByReflection(Object arg) { return null; }
/**
* Returns the name of this as a DataTypeName
*
* @return Return the Documentname of this doumenttype.
*/
public DataTypeName getDataTypeName() {
return new DataTypeName(getName());
}
/**
* Gets the field matching a given name.
*
* @param name The name of a field.
* @return Returns the matching field, or null if not found.
*/
public abstract Field getField(String name);
/**
* Gets the field with the specified id.
*
* @param id the id of the field to return.
* @return the matching field, or null if not found.
*/
public abstract Field getField(int id);
public abstract Collection<Field> getFields();
@Override
public boolean equals(Object o) {
return ((o instanceof StructuredDataType) && super.equals(o));
}
@Override
public int hashCode() {
return super.hashCode();
}
@Override
protected void register(DocumentTypeManager manager, List<DataType> seenTypes) {
seenTypes.add(this);
for (Field field : getFields()) {
if (!seenTypes.contains(field.getDataType())) {
//we haven't seen this one before, register it:
field.getDataType().register(manager, seenTypes);
}
}
super.register(manager, seenTypes);
}
@Override
public FieldPath buildFieldPath(String remainFieldName) {
if (remainFieldName.length() == 0) {
return new FieldPath();
}
String currFieldName = remainFieldName;
String subFieldName = "";
for (int i = 0; i < remainFieldName.length(); i++) {
if (remainFieldName.charAt(i) == '.') {
currFieldName = remainFieldName.substring(0, i);
subFieldName = remainFieldName.substring(i + 1);
break;
} else if (remainFieldName.charAt(i) == '{' || remainFieldName.charAt(i) == '[') {
currFieldName = remainFieldName.substring(0, i);
subFieldName = remainFieldName.substring(i);
break;
}
}
Field f = getField(currFieldName);
if (f != null) {
FieldPath fieldPath = f.getDataType().buildFieldPath(subFieldName);
List<FieldPathEntry> tmpPath = new ArrayList<FieldPathEntry>(fieldPath.getList());
tmpPath.add(0, FieldPathEntry.newStructFieldEntry(f));
return new FieldPath(tmpPath);
} else {
throw new IllegalArgumentException("Field '" + currFieldName + "' not found in type " + this);
}
}
}
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