125 lines
4.4 KiB
Java
125 lines
4.4 KiB
Java
/**
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* This is free and unencumbered software released into the public domain.
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*
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* Anyone is free to copy, modify, publish, use, compile, sell, or
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* distribute this software, either in source code form or as a compiled
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* binary, for any purpose, commercial or non-commercial, and by any
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* means.
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*
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* In jurisdictions that recognize copyright laws, the author or authors
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* of this software dedicate any and all copyright interest in the
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* software to the public domain. We make this dedication for the benefit
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* of the public at large and to the detriment of our heirs and
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* successors. We intend this dedication to be an overt act of
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* relinquishment in perpetuity of all present and future rights to this
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* software under copyright law.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* For more information, please refer to <http://unlicense.org/>
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*/
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package org.mariotaku.querybuilder;
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import org.mariotaku.querybuilder.Columns.Column;
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import java.util.Locale;
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public class Expression implements SQLLang {
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private final String expr;
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public Expression(final String expr) {
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this.expr = expr;
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}
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public Expression(SQLLang lang) {
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this(lang.getSQL());
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}
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public static Expression and(final Expression... expressions) {
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return new Expression(toExpr(expressions, "AND"));
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}
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public static Expression equals(final Column l, final Column r) {
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return new Expression(String.format(Locale.US, "%s = %s", l.getSQL(), r.getSQL()));
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}
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public static Expression equals(final Column l, final long r) {
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return new Expression(String.format(Locale.US, "%s = %d", l.getSQL(), r));
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}
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public static Expression equals(final Column l, final String r) {
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return new Expression(String.format(Locale.US, "%s = '%s'", l.getSQL(), r));
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}
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public static Expression equals(final String l, final long r) {
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return new Expression(String.format(Locale.US, "%s = %d", l, r));
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}
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public static Expression in(final Column column, final Selectable in) {
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return new Expression(String.format("%s IN(%s)", column.getSQL(), in.getSQL()));
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}
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public static Expression notEquals(final String l, final long r) {
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return new Expression(String.format(Locale.US, "%s != %d", l, r));
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}
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public static Expression notEquals(final String l, final String r) {
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return new Expression(String.format("%s != %s", l, r));
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}
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public static Expression notIn(final Column column, final Selectable in) {
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return new Expression(String.format("%s NOT IN(%s)", column.getSQL(), in.getSQL()));
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}
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public static Expression notNull(final Column column) {
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return new Expression(String.format("%s NOT NULL", column.getSQL()));
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}
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public static Expression or(final Expression... expressions) {
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return new Expression(toExpr(expressions, "OR"));
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}
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private static String toExpr(final Expression[] array, final String token) {
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final StringBuilder builder = new StringBuilder();
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builder.append('(');
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final int length = array.length;
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for (int i = 0; i < length; i++) {
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if (i > 0) {
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builder.append(String.format(" %s ", token));
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}
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builder.append(array[i].getSQL());
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}
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builder.append(')');
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return builder.toString();
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}
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public static Expression equalsArgs(String l) {
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return new Expression(String.format(Locale.US, "%s = ?", l));
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}
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public static Expression isNull(Column column) {
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return new Expression(String.format(Locale.ROOT, "%s IS NULL", column.getSQL()));
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}
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public static Expression greaterThan(Column column1, Column column2) {
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return new Expression(String.format(Locale.ROOT, "%s > %s", column1.getSQL(), column2.getSQL()));
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}
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public static Expression like(final Column l, final String r) {
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return new Expression(String.format(Locale.US, "%s LIKE '%s'", l.getSQL(), r));
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}
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@Override
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public String getSQL() {
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return expr;
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}
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}
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