org.geotoolkit.parameter.ParameterValueList Maven / Gradle / Ivy
/*
* Geotoolkit.org - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2004-2012, Open Source Geospatial Foundation (OSGeo)
* (C) 2009-2012, Geomatys
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotoolkit.parameter;
import java.util.List;
import java.util.AbstractList;
import java.util.RandomAccess;
import java.io.Serializable;
import org.opengis.parameter.ParameterValue;
import org.opengis.parameter.GeneralParameterValue;
import org.opengis.parameter.ParameterDescriptorGroup;
import org.opengis.parameter.GeneralParameterDescriptor;
import org.opengis.parameter.InvalidParameterNameException;
import org.opengis.parameter.InvalidParameterCardinalityException;
import org.geotoolkit.resources.Errors;
import org.geotoolkit.referencing.IdentifiedObjects;
/**
* The list to be returned by {@link Parameter#values}.
* This class performs checks on the parameter value to be added or removed.
* This implementation supports {@link #add} and {@link #remove} operations.
*
* @author Martin Desruisseaux (IRD)
* @version 3.00
*
* @since 2.1
* @module
*/
final class ParameterValueList extends AbstractList
implements RandomAccess, Serializable
{
/**
* Serial number for inter-operability with different versions.
*/
private static final long serialVersionUID = -7446077551686135264L;
/**
* The descriptor.
*/
private final ParameterDescriptorGroup descriptor;
/**
* The parameter values for this list.
*/
private final List values;
/**
* Constructs a parameter list.
*
* @param descriptor The descriptor for this list.
* @param values The parameter values for this list.
*/
public ParameterValueList(final ParameterDescriptorGroup descriptor,
final List values)
{
this.descriptor = descriptor;
this.values = values;
}
/*
* CAUTION: Some methods are NOT forwarded to 'values', and this is on purpose!
* This include all modification methods (add, set, remove, etc.).
* We must rely on the default AbstractList implementation for them.
*/
@Override public boolean isEmpty () {return values.isEmpty ( );}
@Override public int size () {return values.size ( );}
@Override public GeneralParameterValue get (int i) {return values.get (i);}
@Override public int indexOf (Object o) {return values.indexOf (o);}
@Override public int lastIndexOf(Object o) {return values.lastIndexOf(o);}
@Override public boolean equals (Object o) {return values.equals (o);}
@Override public int hashCode () {return values.hashCode ( );}
@Override public String toString () {return values.toString ( );}
/**
* Adds a {@linkplain ParameterValue parameter value} or an other
* {@linkplain ParameterGroup parameter group} to this group. If an existing parameter
* is already included for the same {@linkplain ParameterDescriptor#getName identifier},
* then there is a choice:
*
*
* - For
{@linkplain GeneralParameterDescriptor#getMaximumOccurs maximumOccurs}
* == 1, the new parameter will replace the existing parameter.
* - For
{@linkplain GeneralParameterDescriptor#getMaximumOccurs maximumOccurs}
* > 1, the new parameter will be added. If adding the new parameter will
* increase the number past what is allowable by {@code maximumOccurs}, then
* an {@link IllegalStateException} will be thrown.
*
*
* @param parameter New parameter to be added to this group.
* @return {@code true} if this object changed as a result of this call.
* @throws IllegalArgumentException if the specified parameter is not allowable by the
* groups descriptor.
* @throws InvalidParameterCardinalityException if adding this parameter would result in
* more parameters than allowed by {@code maximumOccurs}.
*/
@Override
public boolean add(final GeneralParameterValue parameter) {
modCount++;
final GeneralParameterDescriptor type = parameter.getDescriptor();
final List descriptors = descriptor.descriptors();
final String name = type.getName().getCode();
if (!descriptors.contains(type)) {
/*
* For a more accurate error message, check if the operation failed because
* the parameter name was not found, or the parameter descriptor doesn't matches.
*/
for (final GeneralParameterDescriptor descriptor : descriptors) {
if (IdentifiedObjects.nameMatches(descriptor, name)) {
/*
* Found a matching name. Consequently, the operation failed because
* the descriptor was illegal.
*/
throw new IllegalArgumentException(Errors.format(
Errors.Keys.ILLEGAL_DESCRIPTOR_FOR_PARAMETER_$1, name));
}
}
/*
* Found no matching name. Consequently, the operation failed because the name
* was invalid.
*/
final Object value;
if (parameter instanceof ParameterValue) {
value = ((ParameterValue) parameter).getValue();
} else {
value = "(group)";
}
throw new InvalidParameterNameException(Errors.format(
Errors.Keys.ILLEGAL_ARGUMENT_$2, name, value), name);
}
final int max = type.getMaximumOccurs();
if (max == 1) {
/*
* Optional or mandatory parameter - we will simply replace what is there.
*/
for (int i=values.size(); --i>=0;) {
final GeneralParameterValue oldValue = values.get(i);
final GeneralParameterDescriptor oldDescriptor = oldValue.getDescriptor();
if (type.equals(oldDescriptor)) {
assert IdentifiedObjects.nameMatches(oldDescriptor, name) : parameter;
final boolean same = parameter.equals(oldValue);
values.set(i, parameter);
return !same;
}
}
// Value will be added at the end of this method.
} else {
/*
* Parameter added (usually a group). Check the cardinality.
*/
int count = 0;
for (final GeneralParameterValue value : values) {
if (IdentifiedObjects.nameMatches(value.getDescriptor(), name)) {
count++;
}
}
if (count >= max) {
throw new InvalidParameterCardinalityException(Errors.format(
Errors.Keys.TOO_MANY_OCCURRENCES_$2, name, count), name);
}
}
values.add(parameter);
return true;
}
/**
* Removes the value at the specified index.
*
* @param index The index of the value to remove.
*/
@Override
public GeneralParameterValue remove(final int index) {
return remove(values.get(index).getDescriptor(), index);
}
/**
* Removes the value at the specified index.
*
* @param type The descriptor of the value to remove.
* @param index The index of the value to remove.
*/
private GeneralParameterValue remove(final GeneralParameterDescriptor type, final int index) {
modCount++;
int count = 0;
final String name = type.getName().getCode();
for (final GeneralParameterValue value : values) {
if (IdentifiedObjects.nameMatches(value.getDescriptor(), name)) {
count++;
}
}
final int min = type.getMinimumOccurs();
if (count <= min) {
final int max = type.getMaximumOccurs();
throw new InvalidParameterCardinalityException(Errors.format(
Errors.Keys.ILLEGAL_OCCURS_FOR_PARAMETER_$4, name, count-1, min, max), name);
}
final GeneralParameterValue value = values.remove(index);
assert value!=null && type.equals(value.getDescriptor()) : value;
return value;
}
}
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