/*
 * 作成日: 2004/06/13
 * License Apache 2.0
 *org.apache.tools.ant.fileters.LineContains を元にしています。
 */
package org.jpn.xucker.ant.filter;


import java.io.IOException;
import java.io.Reader;
import java.util.Vector;

import org.apache.tools.ant.filters.BaseParamFilterReader;
import org.apache.tools.ant.filters.ChainableReader;
import org.apache.tools.ant.types.Parameter;


public final class LineWhicheverNotContains
    extends BaseParamFilterReader
    implements ChainableReader {
    private static final String NOTCONTAINS_KEY = "notcontains";

    private Vector notcontains = new Vector();

        private String line = null;

 public LineWhicheverNotContains() {
        super();
    }

    public LineWhicheverNotContains(final Reader in) {
        super(in);
    }

      public final int read() throws IOException {
     
        if (!getInitialized()) {
            initialize();
            setInitialized(true);
        }

        int ch = -1;

        if (line != null) {
            ch = line.charAt(0);
            if (line.length() == 1) {
                line = null;
            } else {
                line = line.substring(1);
            }
        } else {
            line = readLine();
            final int containsSize = notcontains.size();

            while (line != null) {
            	boolean isNotContains=false;
            	if(containsSize==0)
            	isNotContains=true;
                for (int i = 0; i < containsSize; i++) {
                    String containsStr = (String) notcontains.elementAt(i);
                    if (line.indexOf(containsStr) == -1) {
                        isNotContains=true;
                        break;
                    }
                }
                
                if(isNotContains==false){
                	line=null;
                }

                if (line == null) {
                    // line didn't match
                    line = readLine();
                } else {
                    break;
                }
            }

            if (line != null) {
                return read();
            }
        }

        return ch;
    }

    /**
     * Adds a <code>contains</code> element.
     *
     * @param contains The <code>contains</code> element to add.
     *                 Must not be <code>null</code>.
     */
    public final void addConfiguredContains(final NotContains contains) {
        this.notcontains.addElement(contains.getValue());
    }

    /**
     * Sets the vector of words which must be contained within a line read
     * from the original stream in order for it to match this filter.
     *
     * @param contains A vector of words which must be contained within a line
     * in order for it to match in this filter. Must not be <code>null</code>.
     */
    private void setNotContains(final Vector contains) {
        this.notcontains = contains;
    }

    /**
     * Returns the vector of words which must be contained within a line read
     * from the original stream in order for it to match this filter.
     *
     * @return the vector of words which must be contained within a line read
     * from the original stream in order for it to match this filter. The
     * returned object is "live" - in other words, changes made to the
     * returned object are mirrored in the filter.
     */
    private final Vector getNotContains() {
        return notcontains;
    }

    /**
     * Creates a new LineContains using the passed in
     * Reader for instantiation.
     *
     * @param rdr A Reader object providing the underlying stream.
     *            Must not be <code>null</code>.
     *
     * @return a new filter based on this configuration, but filtering
     *         the specified reader
     */
    public final Reader chain(final Reader rdr) {
		LineWhicheverNotContains newFilter = new LineWhicheverNotContains(rdr);
        newFilter.setNotContains(getNotContains());
        newFilter.setInitialized(true);
        return newFilter;
    }

    /**
     * Parses the parameters to add user-defined contains strings.
     */
    private final void initialize() {
        Parameter[] params = getParameters();
        if (params != null) {

            for (int i = 0; i < params.length; i++) {
                if (NOTCONTAINS_KEY.equals(params[i].getType())) {
                    notcontains.addElement(params[i].getValue());
                }
            }
        }
    }

    /**
     * Holds a contains element
     */
    public static class NotContains {

        /** User defined contains string */
        private String value;

        /**
         * Sets the contains string
         *
         * @param contains The contains string to set.
         *                 Must not be <code>null</code>.
         */
        public final void setValue(String contains) {
            value = contains;
        }

        /**
         * Returns the contains string.
         *
         * @return the contains string for this element
         */
        public final String getValue() {
            return value;
        }
    }
}