/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package org.apache.tools.ant.types.selectors;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.Stack;
import java.util.Vector;
import java.util.stream.Collectors;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.DataType;
import org.apache.tools.ant.types.selectors.modifiedselector.ModifiedSelector;

This is the a base class a container of selectors - it does
not need do be a selector itself.
Since:
1.7/**
 * This is the a base class a container of selectors - it does
 * not need do be a selector itself.
 *
 * @since 1.7
 */
public abstract class AbstractSelectorContainer extends DataType
    implements Cloneable, SelectorContainer {

    private List<FileSelector> selectorsList =
        Collections.synchronizedList(new ArrayList<>());

    
Indicates whether there are any selectors here.
Returns:
true if there are selectors/**
     * Indicates whether there are any selectors here.
     * @return true if there are selectors
     */
    @Override
    public boolean hasSelectors() {
        if (isReference()) {
            return getRef().hasSelectors();
        }
        dieOnCircularReference();
        return !selectorsList.isEmpty();
    }

    
Gives the count of the number of selectors in this container
Returns:
the number of selectors/**
     * Gives the count of the number of selectors in this container
     * @return the number of selectors
     */
    public int selectorCount() {
        if (isReference()) {
            return getRef().selectorCount();
        }
        dieOnCircularReference();
        return selectorsList.size();
    }

    
Returns the set of selectors as an array.
Params:
p – the current project
Returns:
an array of selectors/**
     * Returns the set of selectors as an array.
     * @param p the current project
     * @return an array of selectors
     */
    public FileSelector[] getSelectors(Project p) {
        if (isReference()) {
            return getRef(p).getSelectors(p);
        }
        dieOnCircularReference(p);
        return selectorsList.toArray(new FileSelector[selectorsList.size()]);
    }

    
Returns an enumerator for accessing the set of selectors.
Returns:
an enumerator for the selectors/**
     * Returns an enumerator for accessing the set of selectors.
     * @return an enumerator for the selectors
     */
    public Enumeration<FileSelector> selectorElements() {
        if (isReference()) {
            return getRef().selectorElements();
        }
        dieOnCircularReference();
        return Collections.enumeration(selectorsList);
    }

    
Convert the Selectors within this container to a string. This will
just be a helper class for the subclasses that put their own name
around the contents listed here.
Returns:
comma separated list of Selectors contained in this one/**
     * Convert the Selectors within this container to a string. This will
     * just be a helper class for the subclasses that put their own name
     * around the contents listed here.
     *
     * @return comma separated list of Selectors contained in this one
     */
    public String toString() {
        return selectorsList.stream().map(Object::toString)
            .collect(Collectors.joining(", "));
    }

    
Add a new selector into this container.
Params:
selector – the new selector to add/**
     * Add a new selector into this container.
     *
     * @param selector the new selector to add
     */
    public void appendSelector(FileSelector selector) {
        if (isReference()) {
            throw noChildrenAllowed();
        }
        selectorsList.add(selector);
        setChecked(false);
    }

    

This validates each contained selector
provided that the selector implements the validate interface.

Ordinarily, this will validate all the elements of a selector
container even if the isSelected() method of some elements is
never called. This has two effects:

Validation will often occur twice.
Since it is not required that selectors derive from
BaseSelector, there could be selectors in the container whose
error conditions are not detected if their isSelected() call
is never made.

/**
     * <p>
     * This validates each contained selector
     * provided that the selector implements the validate interface.
     * </p>
     * <p>Ordinarily, this will validate all the elements of a selector
     * container even if the isSelected() method of some elements is
     * never called. This has two effects:</p>
     * <ul>
     * <li>Validation will often occur twice.
     * <li>Since it is not required that selectors derive from
     * BaseSelector, there could be selectors in the container whose
     * error conditions are not detected if their isSelected() call
     * is never made.
     * </ul>
     */
    public void validate() {
        if (isReference()) {
            getRef().validate();
        }
        dieOnCircularReference();
        selectorsList.stream().filter(BaseSelector.class::isInstance)
            .map(BaseSelector.class::cast).forEach(BaseSelector::validate);
    }


    /* Methods below all add specific selectors */

    
add a "Select" selector entry on the selector list
Params:
selector – the selector to add/**
     * add a "Select" selector entry on the selector list
     * @param selector the selector to add
     */
    public void addSelector(SelectSelector selector) {
        appendSelector(selector);
    }

    
add an "And" selector entry on the selector list
Params:
selector – the selector to add/**
     * add an "And" selector entry on the selector list
     * @param selector the selector to add
     */
    public void addAnd(AndSelector selector) {
        appendSelector(selector);
    }

    
add an "Or" selector entry on the selector list
Params:
selector – the selector to add/**
     * add an "Or" selector entry on the selector list
     * @param selector the selector to add
     */
    public void addOr(OrSelector selector) {
        appendSelector(selector);
    }

    
add a "Not" selector entry on the selector list
Params:
selector – the selector to add/**
     * add a "Not" selector entry on the selector list
     * @param selector the selector to add
     */
    public void addNot(NotSelector selector) {
        appendSelector(selector);
    }

    
add a "None" selector entry on the selector list
Params:
selector – the selector to add/**
     * add a "None" selector entry on the selector list
     * @param selector the selector to add
     */
    public void addNone(NoneSelector selector) {
        appendSelector(selector);
    }

    
add a majority selector entry on the selector list
Params:
selector – the selector to add/**
     * add a majority selector entry on the selector list
     * @param selector the selector to add
     */
    public void addMajority(MajoritySelector selector) {
        appendSelector(selector);
    }

    
add a selector date entry on the selector list
Params:
selector – the selector to add/**
     * add a selector date entry on the selector list
     * @param selector the selector to add
     */
    public void addDate(DateSelector selector) {
        appendSelector(selector);
    }

    
add a selector size entry on the selector list
Params:
selector – the selector to add/**
     * add a selector size entry on the selector list
     * @param selector the selector to add
     */
    public void addSize(SizeSelector selector) {
        appendSelector(selector);
    }

    
add a selector filename entry on the selector list
Params:
selector – the selector to add/**
     * add a selector filename entry on the selector list
     * @param selector the selector to add
     */
    public void addFilename(FilenameSelector selector) {
        appendSelector(selector);
    }

    
add an extended selector entry on the selector list
Params:
selector – the selector to add/**
     * add an extended selector entry on the selector list
     * @param selector the selector to add
     */
    public void addCustom(ExtendSelector selector) {
        appendSelector(selector);
    }

    
add a contains selector entry on the selector list
Params:
selector – the selector to add/**
     * add a contains selector entry on the selector list
     * @param selector the selector to add
     */
    public void addContains(ContainsSelector selector) {
        appendSelector(selector);
    }

    
add a present selector entry on the selector list
Params:
selector – the selector to add/**
     * add a present selector entry on the selector list
     * @param selector the selector to add
     */
    public void addPresent(PresentSelector selector) {
        appendSelector(selector);
    }

    
add a depth selector entry on the selector list
Params:
selector – the selector to add/**
     * add a depth selector entry on the selector list
     * @param selector the selector to add
     */
    public void addDepth(DepthSelector selector) {
        appendSelector(selector);
    }

    
add a depends selector entry on the selector list
Params:
selector – the selector to add/**
     * add a depends selector entry on the selector list
     * @param selector the selector to add
     */
    public void addDepend(DependSelector selector) {
        appendSelector(selector);
    }

    
adds a different selector to the selector list
Params:
selector – the selector to add/**
     * adds a different selector to the selector list
     * @param selector the selector to add
     */
    public void addDifferent(DifferentSelector selector) {
        appendSelector(selector);
    }

    
adds a type selector to the selector list
Params:
selector – the selector to add/**
     * adds a type selector to the selector list
     * @param selector the selector to add
     */
    public void addType(TypeSelector selector) {
        appendSelector(selector);
    }

    
add a regular expression selector entry on the selector list
Params:
selector – the selector to add/**
     * add a regular expression selector entry on the selector list
     * @param selector the selector to add
     */
    public void addContainsRegexp(ContainsRegexpSelector selector) {
        appendSelector(selector);
    }

    
add the modified selector
Params:
selector – the selector to add
Since:
ant 1.6/**
     * add the modified selector
     * @param selector the selector to add
     * @since ant 1.6
     */
    public void addModified(ModifiedSelector selector) {
        appendSelector(selector);
    }

    public void addReadable(ReadableSelector r) {
        appendSelector(r);
    }

    public void addWritable(WritableSelector w) {
        appendSelector(w);
    }

    
Params:
e – ExecutableSelector
Since:
1.10.0/**
     * @param e ExecutableSelector
     * @since 1.10.0
     */
    public void addExecutable(ExecutableSelector e) {
        appendSelector(e);
    }

    
Params:
e – SymlinkSelector
Since:
1.10.0/**
     * @param e SymlinkSelector
     * @since 1.10.0
     */
    public void addSymlink(SymlinkSelector e) {
        appendSelector(e);
    }

    
Params:
o – OwnedBySelector
Since:
1.10.0/**
     * @param o OwnedBySelector
     * @since 1.10.0
     */
    public void addOwnedBy(OwnedBySelector o) {
        appendSelector(o);
    }

    
Params:
o – PosixGroupSelector
Since:
1.10.4/**
     * @param o PosixGroupSelector
     * @since 1.10.4
     */
    public void addPosixGroup(PosixGroupSelector o) {
        appendSelector(o);
    }

    
Params:
o – PosixPermissionsSelector
Since:
1.10.4/**
     * @param o PosixPermissionsSelector
     * @since 1.10.4
     */
    public void addPosixPermissions(PosixPermissionsSelector o) {
        appendSelector(o);
    }

    
add an arbitrary selector
Params:
selector – the selector to add
Since:
Ant 1.6/**
     * add an arbitrary selector
     * @param selector the selector to add
     * @since Ant 1.6
     */
    public void add(FileSelector selector) {
        appendSelector(selector);
    }

    protected synchronized void dieOnCircularReference(Stack<Object> stk, Project p) {
        if (isChecked()) {
            return;
        }
        if (isReference()) {
            super.dieOnCircularReference(stk, p);
        } else {
            for (FileSelector fileSelector : selectorsList) {
                if (fileSelector instanceof DataType) {
                    pushAndInvokeCircularReferenceCheck((DataType) fileSelector, stk, p);
                }
            }
            setChecked(true);
        }
    }

    
Clone the selector container.
Returns:
a deep clone of a selector container./**
     * Clone the selector container.
     * @return a deep clone of a selector container.
     */
    public synchronized Object clone() {
        if (isReference()) {
            return getRef().clone();
        }
        try {
            AbstractSelectorContainer sc =
                (AbstractSelectorContainer) super.clone();
            sc.selectorsList = new Vector<>(selectorsList);
            return sc;
        } catch (CloneNotSupportedException e) {
            throw new BuildException(e);
        }
    }


    private AbstractSelectorContainer getRef(Project p) {
        return getCheckedRef(AbstractSelectorContainer.class, getDataTypeName(), p);
    }

    private AbstractSelectorContainer getRef() {
        return getCheckedRef(AbstractSelectorContainer.class);
    }

}