| /*========================================================================= |
| * Copyright (c) 2010-2014 Pivotal Software, Inc. All Rights Reserved. |
| * This product is protected by U.S. and international copyright |
| * and intellectual property laws. Pivotal products are covered by |
| * one or more patents listed at http://www.pivotal.io/patents. |
| *========================================================================= |
| */ |
| package com.gemstone.gemfire.cache.query.internal; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Comparator; |
| import java.util.Iterator; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.SortedSet; |
| |
| import com.gemstone.gemfire.DataSerializer; |
| import com.gemstone.gemfire.cache.query.SelectResults; |
| import com.gemstone.gemfire.cache.query.Struct; |
| |
| import com.gemstone.gemfire.cache.query.internal.types.CollectionTypeImpl; |
| import com.gemstone.gemfire.cache.query.internal.types.StructTypeImpl; |
| import com.gemstone.gemfire.cache.query.types.CollectionType; |
| import com.gemstone.gemfire.cache.query.types.ObjectType; |
| import com.gemstone.gemfire.internal.DataSerializableFixedID; |
| import com.gemstone.gemfire.internal.Version; |
| import com.gemstone.gemfire.internal.i18n.LocalizedStrings; |
| |
| public class LinkedStructSet extends LinkedHashSet<Struct> implements |
| SelectResults<Struct>, Ordered, DataSerializableFixedID { |
| |
| private static final long serialVersionUID = -1687142950781718156L; |
| |
| protected StructTypeImpl structType; |
| |
| /** |
| * Holds value of property modifiable. |
| */ |
| private boolean modifiable = true; |
| |
| /** Creates a new instance of StructSet */ |
| public LinkedStructSet() { |
| }; |
| |
| /** Creates a new instance of StructSet */ |
| public LinkedStructSet(StructTypeImpl structType) { |
| if (structType == null) { |
| throw new IllegalArgumentException( |
| LocalizedStrings.SortedStructSet_STRUCTTYPE_MUST_NOT_BE_NULL |
| .toLocalizedString()); |
| } |
| this.structType = structType; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (!(other instanceof SortedStructSet)) { |
| return false; |
| } |
| if (!this.structType.equals(((SortedStructSet)other).structType)) { |
| return false; |
| } |
| return super.equals(other); |
| } |
| |
| /** Add a Struct */ |
| @Override |
| public boolean add(Struct obj) { |
| if (!(obj instanceof StructImpl)) { |
| throw new IllegalArgumentException( |
| LocalizedStrings.SortedStructSet_THIS_SET_ONLY_ACCEPTS_STRUCTIMPL |
| .toLocalizedString()); |
| } |
| StructImpl s = (StructImpl)obj; |
| if (!s.getStructType().equals(this.structType)) { |
| throw new IllegalArgumentException( |
| LocalizedStrings.SortedStructSet_OBJ_DOES_NOT_HAVE_THE_SAME_STRUCTTYPE |
| .toLocalizedString()); |
| } |
| // return addFieldValues(s.getFieldValues()); |
| return super.add(s); |
| } |
| |
| /** |
| * For internal use. Just add the Object[] values for a struct with same type |
| * |
| * public boolean addFieldValues(Object[] fieldValues) { //return |
| * super.add(fieldValues); StructImpl s = new StructImpl(this.structType, |
| * fieldValues); return super.add(s); } |
| */ |
| |
| /** Does this set contain specified struct? */ |
| @Override |
| public boolean contains(Object obj) { |
| if (!(obj instanceof Struct)) { |
| return false; |
| } |
| Struct s = (Struct)obj; |
| if (!this.structType.equals(StructTypeImpl.typeFromStruct(s))) { |
| return false; |
| } |
| return contains(s); |
| // return containsFieldValues(s.getFieldValues()); |
| } |
| |
| /** |
| * Does this set contain a Struct of the correct type with the specified |
| * values? |
| * |
| * public boolean containsFieldValues(Object[] fieldValues) { return |
| * super.contains(fieldValues); } |
| */ |
| |
| /** Remove the specified Struct */ |
| @Override |
| public boolean remove(Object o) { |
| if (!(o instanceof Struct)) { |
| return false; |
| } |
| Struct s = (Struct)o; |
| if (!this.structType.equals(StructTypeImpl.typeFromStruct(s))) { |
| return false; |
| } |
| return remove(s); |
| // return removeFieldValues(s.getFieldValues()); |
| } |
| |
| /** |
| * Remove the field values from a struct of the correct type public boolean |
| * removeFieldValues(Object[] fieldValues) { return super.remove(fieldValues); |
| * } |
| */ |
| |
| // downcast StructSets to call more efficient methods |
| @Override |
| public boolean addAll(Collection c) { |
| //if (c instanceof StructSet) { |
| // return addAll((StructSet)c); |
| //} |
| return super.addAll(c); |
| } |
| |
| @Override |
| public boolean removeAll(Collection c) { |
| //if (c instanceof StructSet) { |
| //return removeAll((StructSet)c); |
| //} |
| return super.removeAll(c); |
| } |
| |
| @Override |
| public boolean retainAll(Collection c) { |
| //if (c instanceof StructSet) { |
| //return retainAll((StructSet)c); |
| //} |
| return super.retainAll(c); |
| } |
| |
| // public boolean addAll(StructSet ss) { |
| // boolean modified = false; |
| // if (!this.structType.equals(ss.structType)) { throw new |
| // IllegalArgumentException(LocalizedStrings.SortedStructSet_TYPES_DONT_MATCH.toLocalizedString()); |
| // } |
| // for (Iterator itr = ss.fieldValuesIterator(); itr.hasNext();) { |
| // Struct vals = (Struct) itr.next(); |
| // if (super.add(vals)) { |
| // modified = true; |
| // } |
| // } |
| // return modified; |
| // } |
| |
| // public boolean removeAll(StructSet ss) { |
| // boolean modified = false; |
| // if (!this.structType.equals(ss.structType)) { return false; // nothing |
| // // modified |
| // } |
| // for (Iterator itr = ss.fieldValuesIterator(); itr.hasNext();) { |
| // Struct vals = (Struct) itr.next(); |
| // if (super.remove(vals)) { |
| // modified = true; |
| // } |
| // } |
| // return modified; |
| // } |
| // |
| // public boolean retainAll(StructSet ss) { |
| // if (!this.structType.equals(ss.structType)) { |
| // if (isEmpty()) { |
| // return false; // nothing modified |
| // } |
| // else { |
| // clear(); |
| // return true; // nothing retained in receiver collection |
| // } |
| // } |
| // boolean changed = false; |
| // int size = size(); |
| // Iterator it; |
| // it = fieldValuesIterator(); |
| // while (size-- > 0) { |
| // Struct val = (Struct) it.next(); |
| // //if (!ss.containsFieldValues(vals)) { |
| // if (!ss.contains(val)) { |
| // it.remove(); |
| // changed = true; |
| // } |
| // } |
| // return changed; |
| // } |
| |
| /** Returns an Iterator over the Structs in this set */ |
| @Override |
| public Iterator iterator() { |
| return new StructIterator(fieldValuesIterator()); |
| } |
| |
| /** Returns an iterator over the fieldValues Object[] instances */ |
| public Iterator fieldValuesIterator() { |
| return super.iterator(); |
| } |
| |
| public CollectionType getCollectionType() { |
| return new CollectionTypeImpl(Ordered.class, this.structType); |
| } |
| |
| // note: this method is dangerous in that it could result in undefined |
| // behavior if the new struct type is not compatible with the data. |
| // For now just trust that the application knows what it is doing if it |
| // is overriding the element type in a set of structs |
| public void setElementType(ObjectType elementType) { |
| if (!(elementType instanceof StructTypeImpl)) { |
| throw new IllegalArgumentException( |
| LocalizedStrings.SortedStructSet_ELEMENT_TYPE_MUST_BE_STRUCT |
| .toLocalizedString()); |
| } |
| this.structType = (StructTypeImpl)elementType; |
| } |
| |
| public List asList() { |
| return new ArrayList(this); |
| } |
| |
| public Set asSet() { |
| return this; |
| } |
| |
| /** |
| * Getter for property modifiable. |
| * |
| * @return Value of property modifiable. |
| */ |
| public boolean isModifiable() { |
| return this.modifiable; |
| } |
| |
| public int occurrences(Struct element) { |
| return contains(element) ? 1 : 0; |
| } |
| |
| /** |
| * Setter for property modifiable. |
| * |
| * @param modifiable |
| * New value of property modifiable. |
| */ |
| public void setModifiable(boolean modifiable) { |
| this.modifiable = modifiable; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuffer buf = new StringBuffer(); |
| buf.append("["); |
| Iterator i = iterator(); |
| boolean hasNext = i.hasNext(); |
| while (hasNext) { |
| Object o = i.next(); |
| buf.append(o == this ? "(this Collection)" : String.valueOf(o)); |
| hasNext = i.hasNext(); |
| if (hasNext) |
| buf.append(",\n "); |
| } |
| buf.append("]"); |
| return buf.toString(); |
| } |
| |
| /** |
| * Iterator wrapper to construct Structs on demand. |
| */ |
| static private class StructIterator implements Iterator { |
| |
| private final Iterator itr; |
| |
| StructIterator(Iterator itr) { |
| this.itr = itr; |
| } |
| |
| public boolean hasNext() { |
| return this.itr.hasNext(); |
| } |
| |
| public Object next() { |
| return this.itr.next(); |
| } |
| |
| public void remove() { |
| this.itr.remove(); |
| } |
| } |
| |
| public void fromData(DataInput in) throws IOException, ClassNotFoundException { |
| this.modifiable = in.readBoolean(); |
| int size = in.readInt(); |
| this.structType = (StructTypeImpl)DataSerializer.readObject(in); |
| for (int j = size; j > 0; j--) { |
| Object[] fieldValues = DataSerializer.readObject(in); |
| this.add(new StructImpl(this.structType, fieldValues)); |
| } |
| } |
| |
| public int getDSFID() { |
| |
| return LINKED_STRUCTSET; |
| } |
| |
| public void toData(DataOutput out) throws IOException { |
| // how do we serialize the comparator? |
| out.writeBoolean(this.modifiable); |
| out.writeInt(this.size()); |
| DataSerializer.writeObject(this.structType, out); |
| for (Iterator<Struct> i = this.iterator(); i.hasNext();) { |
| Struct struct = i.next(); |
| DataSerializer.writeObject(struct.getFieldValues(), out); |
| } |
| } |
| |
| @Override |
| public Version[] getSerializationVersions() { |
| return null; |
| } |
| |
| @Override |
| public Comparator comparator() { |
| return null; |
| } |
| |
| @Override |
| public boolean dataPreordered() { |
| return true; |
| } |
| |
| } |